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St. Alphonsus Church: Repair and Spire Installation

Concrete Repair Bulletin, May/June 2009

The repair of capstones and installation of new spires at a landmark church in Baltimore, Maryland.

Cooling Tower Basin Evaluation and Repair

CTI Journal, Summer 2009

The article reviews the process of regular evaluations for these critical structures and, as needed, the development and implementation of a repair strategy.

The Building Envelope – When and Where to Go for Help

Corporate Facilities Council Summer Newsletter, August 2009

You realize how important the building envelope is to maintaining a building’s energy efficiency, and the next step is getting help. But how do you know when your building needs attention? And where do you go for trusted advice and solutions? When you’re investing in reducing your building’s energy expenses, you want to be sure you’re making the right decisions.

Structural Strengthening Using External Post-Tensioning Systems

Structure, July 2009

The primary reasons for the strengthening of concrete structures are typically to increase existing elements' capacity to carry new loads or to resolve an existing deficiency. Several strengthening techniques such as section enlargement, externally bonded fiber reinforced polymer (FRP) reinforcement, supplemental steel elements, and post-tensioning can be employed to increase the load carrying capacity and improve serviceability of existing structures. However, there are many technical factors that should be considered when selecting a strengthening system.

Electro-Chemical Dewatering System

Structural Engineer, July 2009

For building owners and managers, one of the biggest issues is a damp or moldy basement area resulting from water intrusion through cracked concrete slabs and foundation walls. This is evidenced by the fact that structural engineers are often asked by architects and building owners about the cost to design crack-free concrete structures. Those with experience in concrete repair have found that structural and concrete mix designs must be coupled with exceptional field curing and placement practices in order to achieve “crack-free” or “watertight” concrete.

Dispelling Church Window Restoration Myths

Church Executive, May 2009

Whether a church is a historic property or a modern facility, it is not immune to problems such as water or air infiltration that may arise with its windows. Many times, decision makers assume replacing the existing windows in their churches is the most economic route. However, numerous factors must be considered before such a decision is made.

Temperature Can Affect Upper Floors of Precast Garages

Parking Today, March 2009

Precast concrete double-tees and joists are a common feature on many parking decks. While the use of these materials is proven for parking deck construction, several owners have noticed that the pre-stressed framing members on the top level would be begin to camber.

Not so ‘shocking' results

Structural Engineer, March 2009

Success with impressed cathodic protection for a National Historic Landmark.

Buchanan House Parking Structure: Repair and Installation of Post-Tensioning Tendons

Concrete Repair Bulletin, Mar/Apr 2009

The Buchanan House offers residents of the 200-unit luxury apartment complex nearly 600 parking spaces in a below-grade, three-story parking garage. In addition to the luxury residential units, the facility features restaurants and other retail shops on the street level, which results in additional parking needs. The consulting engineer for the project recognized that the post-tension concrete structure had begun to experience degradation from water infiltration. Additionally, the use of de-icing salts had caused corrosion of the existing buttonhead post-tensioning system.

Understanding Post-Tensioned Concrete Repair

Structural Journal, Winter 2009

In post-tensioned concrete construction, reinforcing bars and post-tensioning tendons are required to support self-weight and intended service loads. As these structures age, many time-related problems occur, such as corrosion of the tendons or strands. For owners of a post-tensioned structure, the responsibility of ensuring the safety of tenants or those using the structure is paramount.

Controlling Corrosion on the La Unidad Bridge in Campeche, Mexico

Concrete Repair Bulletin, Jan/Feb 2009

Nearly two miles long, the 30-year-old bridge is subjected to an aggressive marine environment and is part of a major highway that runs along the coastline from Texas to the tip of the Yucatán peninsula. A visual inspection of the structure revealed that cracks had penetrated the concrete matrix and corrosion of the reinforcing was present and active. Since the bridge is essential for the community – and any detour would be hefty, the Mexican federal and local transportation authorities elected to repair it.

The Building Envelope – A Little-Known Key to Energy Efficiency

Quorum Magazine, October 2008

Energy efficiency is one of the most pressing concerns for today's property owners. Municipalities are increasingly regulating the energy efficiency of buildings, and owners are becoming more aware of their responsibilities to reduce their buildings' energy consumption. As a result, many property owners are scrambling to do whatever they can to make their buildings more efficient. In the mad rush of updating and making changes, many fail to realize a building system that can have a huge impact on a building's energy efficiency. The building envelope plays a critical role, as it forms the barrier between a building's interior and exterior environments. And with proper management, the building envelope can significantly slash a building's energy demand.

Christ Church Harbor Apartments/University Specialty Hospital Plaza Deck Repair

Concrete Repair Bulletin, September/October 2008

Originally constructed approximately 30 years ago, time had taken its toll on this 30,000 square foot, multi-level plaza deck. Most of the exposed aggregate concrete topping on all three levels had deteriorated. Due to sections of failed waterproofing, water was migrating through the concrete topping and leaking into the occupied parking garage located below most of the plaza deck. In order to achieve the optimum repair solution, owners coordinated their efforts to engage a qualified engineer and repair contractor to repair the plaza deck, fountain and planter box, prevent future leaks and update and modernize the overall appearance of the area so that tenants and visitors could once again enjoy the plaza.

Plaza Deck Restoration at 300 Winston Towers

Concrete Construction Online, September 2008

Located along the western banks of the Hudson River in Cliffside Park, N.J., 300 Winston Towers is a popular residential building with approximately 600 units. Over the years, pooling water on the entrance plaza had leaked into the parking garage below, leading not only to the deterioration of the entrance plaza structural slab, but also to spalling of some of the concrete beams and columns in the garage. The solution came in the form of a waterproofing membrane.

Strategies for Infrastructure Reliability

Hydrocarbon Engineering, September 2008

Being proactive in the understanding of your refineries infrastructure needs may not make you money, but it sure can improve safety and save you money.

Hyperbolic Cooling Tower Column and Lintel Beam Protection

The Construction Specifier, September 2008

Used in large power generation plants, hyperbolic natural draft cooling towers are extremely susceptible to corrosion-induced deterioration. Due to the unique water cooling process, practically all surfaces in the basin are subject to “immersion” conditions. The columns and lintels are in a “splash zone” environment subject to intermittent wet and dry conditions. Construction of new hyperbolic natural draft cooling towers, however, represents a large capital investment so maintaining existing towers is crucial.

The Foundations of Compressor Foundation Maintenance

Compressor Tech Two, August 2008

Compressor foundations, some more than 50 years old, are often neglected. However, they need vital maintenance if they are to perform satisfactorily.

Protecting Your Assets: Caring for Your Historic Building

The Florida Preservationist, Fall 2008

Of the components that make up the building envelope, perhaps the most important when determining the source of a problem is the wall system. To function as intended, several factors must be taken into consideration.

Efficient Floor Framing Systems: Preliminary Sizing of Post-Tensioned Floors (PDF)

Structural Engineer, 10/01/2008

When designing for thinner floors, using post-tensioning to resist loads and deflections provides a more optimal solution than conventionally reinforced floors. This fact is primarily due to the load-balancing effect of the draped post-tensioned tendons.

Floor Framing System Selection : Applications of Post-Tensioning in Buildings

Structural Engineer, August 2008

Designers have a multitude of choices in building design, especially in the selection of a flooring framing system. Post-tensioned flooring systems offer a great deal of flexibility, and when properly designed, can significantly impact the cost of materials and speed of construction.

Window Restoration Benefits Owners and Communities

School Planning & Management, August 2008

When it comes to aging windows, new replacements don’t always equal a better option. Decision makers must realize that oftentimes repairing or restoring existing windows, rather than replacing with new models, offers the best alternative.

Identifying Building Envelope Problems

Interface , July 2008

By definition, “envelope” is an encapsulating covering such as an outer shell or membrane. In simple building terms, it consists of the roof, above-grade wall system and the below-grade wall system. An envelope’s purpose is to provide protection from external elements, which, in building construction means protection from moisture, air and temperature ingress and egress.

SCC Proves Successful in Repair and Strengthening Projects

Structure, July 2008

Self-consolidating concrete (SCC) has been used for a variety of new construction and precast manufacturing projects since its inception in the 1980's. Recently, design and construction professionals have found that the features and benefits related to SCC can solve many constructability and placement challenges that most concrete mix designs can not.

From Eyesore to Opportunity: Adapting an Older Building for a New Use

Applicator, Summer 2008

It is inevitable that structures will age and outgrow their original intended function. With changes in technology and lifestyle, construction design is constantly updated to meet modern demands and older structures are left in the wake of change. Those sensitive to history may prefer to restore older structures to their former glory, however, associated costs often make this plan unrealistic. An alternate concept is adaptive reuse - a process of retrofitting buildings for new uses, which allows structures to retain their historic integrity, while providing for the occupants' modern needs.

Causes and Effects of Low Strength Concrete and Repair Options

Strengthening E-News, June 2008

For a contractor or ready mix supplier, there are few things during a construction project that can match the anxiety of receiving compressive strength test results that indicate the material is not reaching the specified strength level. Learn about the causes and effects of low strength concrete as well as repair options.

Balcony Repair: Long-Term Approach Is Best

Concrete Engineering International, Summer 2008

A typical concrete balcony in Florida, constantly exposed to the harsh coastal elements, is a breeding ground for deterioration. As such, condominium owners and associations often find themselves in the middle of balcony repair projects. All too often, though, a shortsighted approach to balcony restorations is taken, and only minimal repairs are made at one time. As a result, owners fail to realize the practical and economic benefits of a more long-range approach to balcony repair.

Unique Repair Strategies Ensure Longevity for National Landmark Lighthouse

Revitalization e-Digest, May 2008

About one-mile out from the shore of the Chesapeake Bay stands the nation's last operational screw-pile foundation lighthouse in its original location - Maryland's Thomas Point Shoal Lighthouse. The 43-foot-tall lighthouse has withstood the most tremendous weather conditions of the Bay and South River since 1875. Located about four miles from Annapolis, Md., the lighthouse is a beacon of safety for vessels traveling the bay.

Electrochemical Treatments on Historic Steel Frame Buildings

The American Institute of Architects, March 2008

Corrosion is present in historic buildings which utilize iron or steel in construction and can cause a variety of failures leading to masonry damage, the loss of original fabric, and even death. Traditional repair techniques can temporarily slow the corrosion process but do not provide a long term solution for corrosion.

Corrosion - Hidden in Plain Sight

Hydrocarbon Engineering, March 2008

Besides the catastrophic consequences associated with manmade (i.e., fire and explosions) as well natural (i.e., tornadoes and hurricanes) disasters, long-term degradation of the infrastructure should be anticipated and scheduled maintenance planned well in advance to keep costs low and infrastructure dependability high.

Sneaking a Peak - The Benefits of Physical Mock-Ups

Structural Engineer, March 2008

From an engineer’s perspective, mock-ups – detailed, full-scale, site-constructed samples of part of a project – are an important part of today’s construction process. Typically, mock-ups are requested as part of the submittal process in order to verify the contractor’s ability to install a given product in accordance with the specifications but, they also provide the owner with a means of comparison by which to judge the acceptability of the required work.

Maintaining Masonry - Repair Beyond Caulk

The Construction Specifier, February 2008

The image of any building constructed with masonry typically conjures thoughts of a structure designed for permanence and durability - a construction so sound that it will last through many decades. After all, masonry structures dating to ancient times still stand tall in many places all over the world. Yet over time, even the most soundly designed and constructed masonry buildings require some attention. Extreme weather conditions and the general effects of time may lead to a need for masonry repair. Or, in some cases, poor building design or construction may be the cause.

Expanding the Use of Post-Tensioning in Buildings (PDF)

Structure, January 2008

For more than 40 years, post-tensioned concrete has been used in buildings. It is widely accepted by structural engineers for offices, parking garages, condominiums and apartments.

Corrosion-Induced Deterioration: Repairs and Protections

Power Engineering Magazine, November 2007

As the supply source for operations in power generating plants, water intake structures serve an important function. Because of the constant exposure to water - whether fresh, brackish or marine - these intake structures are extremely susceptible to corrosion-induced deterioration. However, with an understanding of the root cause for corrosion-induced concrete deterioration and the technologies available to address it, plant and maintenance professionals can adopt the proper mechanisms and rehabilitation strategies.

Preserving the Past: Historic Repair Requires Informed Approach

Design Cost Data E•News, October 2007

Whether the job calls for rehabilitating a 1920s-era high-rise structure in a city's downtown or restoring a Founding father's estate to its original luster, historic preservation projects call for a great deal of expertise.

Minimizing Risk with Mock-ups

Applicator, Summer 2007

Mock-ups – a detailed, full-scale sample of part of a project to be completed – can be an important part of today’s construction process. Primarily used as part of the submittal process to verify the contractor’s ability to install a given product in accordance with the specifications, they provide the owner with a means of comparison by which to judge the acceptability of the required work.

Shock therapy - Florida DOT uses galvanic cathodic protection to protect its bridges from corrosion.

Public Works Magazine, August 1, 2007

Corrosion of reinforcing steel in concrete is a dangerous problem-and all too common for the many bridges in Florida's salt-water environments. It induces cracks and spalls, which compromises structural integrity and public safety. Florida's warm climate and abundance of chlorides make the bridges highly susceptible to corrosion.

Post-Tensioning Revisited

Structure Magazine, July 2007

Post-tensioned concrete has been used for more than 40 years in the United States in a wide variety of construction projects. First used primarily in bridge construction, applications for post-tensioning now extend far beyond bridges to include tanks, office buildings, condominiums, hotels, parking structures, pavement, masonry, seismic walls, single-family homes and more.

Employee Retention Requires Person-Centered Plan

National Parking Association, June 2007

Retaining good employees is critical to a firm’s long-term success. And in the engineering and construction markets, employee retention is especially serious since the job market is tight and competition is fierce for top candidates.

The Building Envelope (PDF)

Corporate Facilities Council, Spring 2007

From energy-efficiency to indoor air quality, the issues that face today's building owners are increasingly complex. While there is no substitute for getting a design professional involved in diagnosing and fixing a problem in a structure, understanding the exterior components, or the building envelope, will pay dividends in determining the optimal solution.

Maintenance Crucial for Brick Liners

Masonry Construction, April 2007

Many structures built in the 1970s through the mid-1980s were equipped with free-standing, acid-resistant brick linings. Although some of these independent brick-lined chimneys operate dry and encounter minimal problems, many work downstream of old-generation wet FGD systems still using bypassed flue gas for reheat.

Pumps & Systems, March 2007

Precast polymer concrete pump foundation systems provide numerous advantages over conventional means, including savings in installation costs, improved reliability and superior corrosion resistance for pumps in corrosive service.

Avoiding Pitfalls in Plaza Deck Restoration

Florida Commercial Association Journal, March 2007

It is no secret that the "gold" coast of South Florida is lined with high-rise condominiums - the majority of which are now close to 30 years old. Subject to the harsh environmental conditions common along the coast, age and natural wear-and-tear, it is crucial to examine the condition of these structures' plaza decks.

Structural Healing

Hydrocarbon Engineering, February 2007

Industrial environments differ markedly from the commercial, public, transportation and residential markets by the sheer aggressive nature of their service. A commitment to continuous improvement often results in the need for new facilities or modifications to the existing facility.

Restoration Project Showcase Importance of Safety and Scheduling for High-Rise Repair

Concrete, February 2007

Xerox Corporation's 33-story Xerox Square Tower stands high along the Rochester, NY skyline. On 25 September 1998, a mild earthquake created vibrations reaching Rochester.

St. Mark's Church Historic Restoration (PDF)

Concrete Repair Bulletin, January/February 2007

Built in 1888, St. Mark's Church in Catonsville, MD, is a treasured place for many in the community. Generations of families have called the church home and have come to appreciate the rustic charm of the structure.

Corrosion Conundrum

Bridges, Jan/Feb 2007

When corrosion occurs in the post-tensioning for bridges and other structures, effects can be disastrous. Following random inspections of Florida bridges that revealed corrosion in a few of the structures' post-tensioning, the Florida Department of Transportation (FDOT) called for a full investigation in late 2000 to determine the degree of corrosion in all FDOT bridges reinforced with post-tensioning.

Renovating Resorts Atlantic City (PDF)

Concrete International, November 2006

The adage "time is money" is certainly relevant to many industries, but is particularly relevant to building renovations and the costs of downtime, interruptions to services, or inconveniences to customers. To the casino industry, the phrase is even more literal.

The Specialty Contractors' Role in Adaptive Reuse Projects

SWRI, November 2006

In the era of adaptive reuse, owners and developers are opting for massive upgrades to their structures. The most common change of use is likely the adaptation of an apartment building to a condominium.

Proactive Recruiting: Attracting Today's Top Graduates Requires Plan of Action

CE News, September 2006

The competition among A/E/C firms to attract today’s top graduates from engineering and construction science programs is fierce. A growing construction marketplace, plus fewer people entering the A/E/C industry, is fueling demand for candidates in these disciplines.

Four Bears Bridge: A New Landmark for North Dakota

Bridges, September/October 2006

The Four Bears Bridge is the only crossing of the 150-mile-long Lake Sakakawea on the Fort Berthold Indian Reservation. It is the first post-tensioned precast segmental bridge in the state and resulted in North Dakota and the Tribes embracing a new landmark that celebrates the past and the future.

Flooring Fix: Green Solution Proven to Successfully Strengthen Industrial and School Facility Floors

Adhesives & Sealants Industry, August 2006

It isn’t enough for maintenance professionals today to simply keep up their facilities. In addition to meeting the demands new loads and change of use places on a facility, industrial building owners and educational institutions are pressured to utilize environmentally-friendly solutions that still offer extreme durability.

Heating Up to Disaster: Why Hospital Must Engage in Regular Inspections of Their Boiler Rooms

Heathcare Building Ideas, August 2006

Pressured to provide more and better service with streamlined resources, economic belt-tightening is a way of life in today’s healthcare arena. Those responsible for maintaining facility utilities are challenged to improve systems and their performance while reducing costs at the same time.

APTDC Newsletter, Summer 2006

It is inevitable that structures will age and outgrow their originally intended functions. With changes in technology and lifestyle, construction design is constantly updated to meet modern demands, leaving the predecessors in its wake.

High-Rise Repair Challenges

Concrete Engineering International, Summer 2006

Every repair job has its own unique set of challenges. The intricacies found in a high-rise repair project often give contractors little pause.

Why Construction Safety is Important

Facilities Manager, July/August 2006

Today’s owners face a variety of risks when they undertake a construction project. Not only must owners be concerned with potential risks to their employees, tenants, or property, but they must also be concerned about the risks that the contractor bears.

Glulam Beam Repair: The Dangers of Uninspected Beams

The Construction Specifier, June 2006

For years, retailers, school districts, church groups and others have benefited from the efficiency, design freedom and economy of integrating structural, glued laminated (glulam) wood beams and trusses into the design of their structures. In addition to offering a natural wood appearance that holds a timeless appeal, glulam beams are specified for their strength and durability.

Blast Mitigation of Concrete Structures

The Construction Specifier, March 2006

Although recent concerns about terrorism have generated a wider knowledge of the consequences of bombing, the majority of public, federal, and corporate buildings still has minimal blast-resistance capacities and may not be able to survive the destructive effects of such attacks.

Micropile: Geotechnical technologies stabilize effects of settlement

Concrete Monthly, November 2005

Building settlement and cracked concrete are simple facts of life in construction. However, though all structures experience settling in one fashion or another, the level or degree of the settlement determines whether or not problems will result.

Stacking Up - A maintenance program for chimneys is necessary to help schools avoid costly repairs later (PDF)

American School and University, November 2005

Chimneys and stacks appear to be strong and indestructible. But chimneys begin to deteriorate from the moment they are built.

Corrosion Control (PDF)

Concrete Repair Bulletin, Sept/Oct 2005

According to a recently completed study sponsored by the Federal Highway Administration (FHWA), NACE International, and mandated by Congress in the Transportation Equity Act for the 21st Century (TEA-21), corrosion of metals costs the United States in excess of $276 billion per year.

Identifying Building Envelope Problems (PDF)

Applicator, Summer 2005

As complex and intricate as the building envelope seems to be, how can you tell if a building envelope is going to have or is already having problems?

Prescribing a Bonded Post-tensioning System

Structural Engineer, July 2005

Bonded post-tensioning system minimizes life-cycle maintenance costs.

Post-Tensioning Update

Associated Construction Publications, June 15, 2005

Although post-tensioning has been a proven solution in the marketplace for almost five decades, older systems focused more on obtaining the desired prestress force and less on durability. Today, however, the industry has evolved to offer systems that deliver the desired prestress force while providing improved protection for the prestressing steel.

Is Time on Your Side? (PDF)

Parking, June 2005

Parking professionals know very well that the way to help ensure that their facilities stand the test of time is to develop and implement a regular preventive maintenance plan. However, a preventive maintenance plan alone will not guarantee a long life for your concrete structure.

Repair of Condominiums

Concrete, June 2005

Concrete comes under attack from both natural and man-made forces almost from the time it is first formed and poured. The relative rate of degradation resulting from these assaults depends on a wide variety of factors of which only some are controllable.

Solid Cures for Concrete Floor Problems

Plant Services, May 2005

Floor slabs must withstand tough conditions such as impact and abrasion from heavy, moving traffic and static loads, and ideally, the floor must be flat, in proper alignment and in good shape. Unfortunately, because of initial construction techniques, or uses and loads that differ from the original design, slab-on-grade floors can develop problems that often result in costly delays or downtime.

A Guide for Concrete Restoration

Florida Community Association Journal, May 2005

According to the National Association of Realtors, sales of existing condos and co-ops have dramatically increased in recent years. Such data demonstrates the growth that the condominium market is experiencing. However, to ensure that owners receive value on their investment, condominium facility and property managers, as well as association boards, must allocate proper funds to the repair and upkeep of the units.

The Building Envelope Breakdown

Today's Facility Manager, May 2005

The issues that facility managers face today are increasingly complex-especially when something goes wrong. While there is no substitute for getting an outside professional involved in the diagnosis and repair of a structural problem-be it leaks, deterioration, or other scenarios that pose a potential threat to the safety of the occupants-an understanding of the building envelope will pay dividends in determining the optimal solution.

Post-tensioning techniques reinforce water tanks

Water & Wastewater International, May 2004

The water and wastewater industry is undergoing tremendous changes due to population growth, aging infrastructure, security concerns and water quality regulation. All of these factors have contributed to industry growth, which calls for the construction of new storage and process tanks that reduce long-term maintenance costs.

Concrete Under Stress

Structural Engineer, April 2005

There is little argument that today's owners have a vested interest in using innovative techniques that not only provide efficient and cost-effective construction solutions, but also provide long-term value in terms of life-cycle cost. One growing solution — the VSLAB post-tensioning system — has proven to be a leading means of minimizing maintenance costs of concrete structures.

Parking structure managers express concern over maintenance issues

Concrete Monthly, April 2005

Maintenance and the durability of parking structures are primary concerns for facility managers, according to the results of a recent survey. Results of the online survey of more than 750 respondents conducted by Structural Group and Parking Today magazine present the construction industry with tremendous opportunity in this market.

Stacked Odds in Brick-Lined Chimney Repair

The Construction Specifier, April 2005

Chimneys begin to deteriorate exponentially from the moment they are built, even before being put into service. While signs are often hidden during the structure's early years, decline accelerates rapidly and often catches building owners and facility managers off-guard.

Maintain Concrete Properly to Preserve its Strength

Plant Engineering, March 1, 2005

A basic understanding of what concrete is, the lessons learned throughout its centuries of use, and how to strengthen and repair a concrete building is critical for maintaining safety and durability. This fundamental knowledge will provide the foundation for recognizing when your facility is in need of repair.

Advances in Post-Tensioning Systems Lead to Improved Concrete Tank Durability

WaterWorld, March 2005

With a basic understanding of prestressed, post-tensioned concrete and recently enhanced multistrand and monostrand systems, industry professionals can select the optimal solution for their next water storage or process tank.

Steel-Belted Flooring: Concrete Flooring is Strengthened by Polymer Technology

InMFG, February 2005

For more than 40 years, various forms of polymer based flooring systems have been successfully applied to concrete surfaces. These systems have become mainstream forms of protection against aggressive chemicals, abrasion and impact while also offering an appealing aesthetic appearance.

Protecting Your Assets: The Building Envelope Breakdown

The Business Monthly, February, 2005

While there is no substitute for getting a design professional involved in diagnosing and fixing a problem in a structure, understanding the exterior components - or the building envelope - will pay dividends in determining the optimal solution.

The Rehabilitation of Cooling Towers (PDF)

Concrete International, January 2005

Natural-draft hyperbolic cooling towers are extremely susceptible to corrosion-induced deterioration. Exposure conditions, and the resulting deterioration, vary depending on a host of factors.

Renovation of Baltimore's Historic Hippodrome Theater (PDF)

Concrete Constuction, November 2004

Dealing with unexpected job conditions midway through a project is a challenge for any contractor, especially when there's not enough time or money to make the changes. Because of its extensive experience and by using creativity and management skills, Structural Preservation Systems, Inc. (SPS), one of the specialty contractors for Baltimore's historic Hippodrome Theater renovation, was able to meet the challenge head-on.

Parking Garage Repair - A Case Study

Parking Today, September 2004

With more than 24,000 parking garages located throughout the United States, there is no denying the important role they play in society. However, as some of the structures begin to age, experience an increase in loads, and suffer the effects of chemical and de-icing salt usage, garages are often left in need of repair and retrofit.

Technology Imparts Blast Resistance Wire-to-Wire

Concrete Products, September, 2004

A proprietary innovation in blast-resistance is based on a familiar technology. Steel-belted radial tires incorporate the same wire metallurgy as Hardwire, a family of high-tensile-steel reinforcement products said by the manufacturer to have been successfully implemented as blast-resistance and blast-mitigation retrofit solutions on a variety of structures and infrastructure components.

Structures Needing Strength Get a Stiff Belt from Hardwire

Engineering News-Record, Aug 30/Sept 6, 2004 Issue

Some call it "steel-belted duct tape." Inspired by a rebar cage, an inventor in 2000 began tinkering in his garage with ultrahigh-strength twisted steel wires, attempting to replicate the structure in miniature. The material, called Hardwire, comes in various configurations, but all resemble duct tape in being thin and shipped on a spool.

Hardwire Steel-Belted Reinforcement Product Provides New Solution for Blast-Resistance Need

Business Wire, August 17, 2004

Hardwire, LLC has announced that their proprietary high-tensile steel reinforcement products -- based on steel-belted technology commonly found in tires -- have been successfully implemented as solutions for structures and other infrastructure components seeking blast-resistance and blast-mitigation retrofit.

Remediating Corrosion in Hyperbolic Towers (PDF)

Power Magazine, July/August 2004

Generally, natural-draft (that is, hyperbolic) cooling towers are less expensive to operate and maintain than their mechanical-draft cousins. However, hyperbolics- which are made of concrete- are vulnerable to corrosion-induced physical damage that can be very costly to repair.

Concrete Q&A: Design Considerations for Fire Resistance of Structural Strengthening System

Structural Engineer, July 2004

Determining design parameters is the first and most important step into achieving adequate and durable strengthening solution. In addition to strength and serviceability, design parameters should address environmental exposure and fire rating issues.

Growing Smart (PDF)

Concrete Construction, July 2004

A common buzzword in today’s business world is culture. At management conferences and executive seminars, we are all told that we need to establish a corporate culture that governs our business and philosophy. However, as many have found, such a task is neither easy nor complete without an ongoing commitment. This is because a culture goes beyond ideals, to how you make choices.

A Clean Sweep: Tips for Radial Brick Chimney Maintenance

Structural Engineer, June 2004

Although radial bricks are no longer used to construct industrial chimneys, regular maintenance and repair are necessary for continued operations.

Keys to Success: Structural Repair and Strengthening Techniques for Concrete Facilities

Structural Engineer, May 2004

Concrete experts commonly use the terms structural repair and strengthening to describe building renovation activities. Although the two terms sound similar, they refer to slightly different concepts.

Encore

Building Design and Construction, April 1, 2004

In Baltimore, ambitious renovation and expansion projects have the spotlights shining anew on three venerable performing arts venues. Timing is everything in the theater and performing arts, as well as in building design and construction.

Post-tensioning system takes off at airport garage

Concrete Products, March 2004

According to industry associations, it costs about $10,000 to $12,000 per space to build a new multi-level garage. Even more staggering is the estimated $650-per-year cost of simply operating the structure — including lighting, cleaning, employees, elevators and gate equipment.

Design, Application Techniques Key to Successful Structural Repair, Strengthening of Aging Concrete Facilities

Concrete Monthly, February 2004

A significant number of facilities in the United States were constructed during the first half of the 20th Century using reinforced or prestressed concrete materials. Now, at the beginning of the next century, many of these buildings have reached the end of their planned service life, and deterioration in the form of steel corrosion, concrete cracking and spalling is frequently observed.

Concrete Products, February 1, 2004

Concrete experts commonly use the terms structural concrete repair and strengthening to describe building renovation activities. Although they sound similar, the two terms refer to slightly different functions.

Hydrocarbon Engineering, January 2004

In petrochemical facilities, fires when they occur, develop quickly into "pool fires", rapidly reaching 2,000oF (1,100oC) in a matter of minutes. Unfortunately, unprotected structural steel members lose about ½ their strength at 1,000oF (538oC) and rapidly loses more strength as the temperature rises.

Concrete Repair Technology - A Revised Approach is Needed (PDF)

Concrete International, January 2004

In recent years, durability problems, poor performance, and, most of all, repair failures have tarnished the public's image of concrete. Repair failures and endless "repair of repairs" make a substantial contribution to the current perception of concrete.

PTI Structure Awards Competition (PDF)

Concrete International, January 2004

The Post-Tensioning Institute (PTI), Phoenix, AZ, reinstated its Structure Awards Competition in 2003— the first one PTI has held since 1987—with plans to continue the program as an annual event. Winners are chosen in five categories and seven projects received honorable mention.

Better Bridges: Vietnam Veterans Memorial Bridge Completed Quickly

Better Roads, November 2003

The Vietnam Veterans Memorial Bridge, which crosses the James River directly downstream of the Port of Richmond, is the gem among the 15 bridges along the new 8.8-mile Route 895 Connector, known as the Pocahontas Parkway. The new toll road was planned to alleviate congestion and traffic delays by linking I-95 in Chesterfield County to I-295 in Henrico County.

Steel-Reinforced Composite Offers Strength and Flexibility

Engineering News-Record, October 6, 2003

A new strengthening product offering from VSL is set to change the landscape of concrete reinforcing materials. Hardwire is a steel-reinforced polymer (SRP) composite that is bonded externally to structural elements, allowing end users to incorporate ultra high tensile strength fibers inside or outside almost any material.

Stack Lining Retrofit Has Three-Year Payback

Power Engineering Magazine, October 2003

Like many power plants constructed in the early 1970s, Louisville Gas & Electric's (LG&E) 2,000 MW Mill Creek coal-fired power plant was required to add a wet scrubbing systems to comply with EPA pollution control guidelines. As part of the wet scrubber installation a re-heater system was also installed.

Advantages of Post-Tensioning in Water Tanks

Engineering News-Record, October 13, 2003

For decades, storage tanks have been the primary resource to store municipal water and wastewater. Yet today's technology is making them tougher.

Benefits of Pre-Cast Pump Base Plate and Foundation Systems (PDF)

Solutions! Magazine, August 2003

Installing and maintaining pump foundations and base plates have always posed challenges to plant maintenance and construction personnel in the demanding pulp and paper mill environment.

An Investigative Approach Yields Success (PDF)

Hydrocarbon Asia, July/August 2003

Managers of coking units face serious challenges both in controlling day-to-day processes and maintaining the structural integrity of their coking units. Deterioration and damage to concrete support structures can have a severe and costly impact on coking operations.

Keeping Chimneys Standing Tall

BIC Alliance, June/July 2003

Chimney maintenance can be one of the most challenging of plant MRO activities. Their height, form, and functions make them quite unique from other structures.

CC100: Concrete Construction's List of the Top 100 Concrete Contractors in America (PDF)

Concrete Construction, May 2003

"What doesn't destroy me makes me stronger" could be the nation's slogan for 2001, and that's also an appropriate description of the concrete construction industry's year. It was indeed a challenging year - as is the first half of 2002.

Peter Emmons: Forward Thinker, User of Technology

ConcreteNetwork.com, May 2003

When he's not busy leading his very successful company, Structural Preservation Systems (SPS), Inc. - which delivers services, systems and technologies that build, repair, protect, strengthen and reinforce concrete, steel, masonry, timber and soils - Peter Emmons is involved in other endeavors, including Fixconcrete.org.

Landmark MSU Smokestack Coming Down

Bozeman Daily Chronicle, May 2003

Working without a net -- but with plenty of safety gear -- two workmen clambered to the top of the Heating Plant smokestack at Montana State University on Wednesday to start tearing down the landmark, brick by brick.

Bonded, Post-Tensioning at BWI Airport (PDF)

Concrete International,, May 2003

When selected by the Maryland Aviation Administration (MAA) to provide design services for the new Baltimore Washington International Airport (BWI) Consolidated Parking Garage, Walker Parking Consultants and Michael Baker Architects opted to use the most advanced techniques and materials possible.

Co-Extruded Stay Pipe and Strand-By-Strand Installation Combo

Engineering News-Record, April 14th, 2003

The William H. Harsha Bridge uses a VSL Monostrand Stay Cable System. It is the first cable-stayed bridge in the U.S. to use co-extruded stay pipe and strand-by-strand installation.

Successful Approach to Repair of Coke Drum Support Structures

World Refining, April 2003

In addition to the challenges of controlling day-to-day process operations, managers of coking units also face the equally critical issue of maintaining the structural integrity of the concrete support structures. It should come as no surprise that deterioration and damage to concrete support structures can have a severe and costly impact on coking operations, often leading to unforeseen and costly shutdowns.

Post-Tensioned Retrofitting Maintains Landmark's Aesthetics (PDF)

Concrete International, April 2003

When selected by the Western Pennsylvania Conservancy to renovate Fallingwater - one of Frank Lloyd Wright's most famous designs - VSL (a post-tensioning contractor) became part of a team focused on saving the ailing structure.

Saving Fallingwater

This Old House Magazine, January/February 2003

Fallingwater, Frank Lloyd Wright"s masterpiece, has been featured on a U.S. postage stamp, on the cover of Time magazine, and in perhaps a shelf-full of coffee table books. Too bad it wasn"t built properly.

FRP Technology Repairs and Strengthens Municipal Aqueduct System

PublicWorks Magazine, January 2003

The first-ever on-site application of FRP strengthening technology to water pipelines enabled the Providence Water Supply Board to repair rather than replace 50-year-old pipes in its aqueduct system.

Post-Tensioned Masonry Around the World (PDF)

Concrete International, January 2003

Post-tensioned masonry combines an advanced construction technique with an old building material almost forgotten in the education of civil engineers. The major advantages of masonry have always been the overall availability of its raw materials, it's easy and economical construction, and its natural beauty and durability.

Finding True North

Concrete Construction, December 2002

CONCRETE CONSTRUCTION, with assistance from the Strategic Development Council, invited a group of industry visionaries to come together this past summer to look at the big picture.

CFRP Strengthening and Load Testing of a Parking Garage: A Case Study

Third Middle East Symposium On Structural Composites for Infrastructure Applications, December, 2002

This article explores a case study for the upgrade and full-scale load testing of a parking garage for a commercial office rental property. Carbon fiber reinforced polymer (CFRP) reinforcement was considered for flexural strengthening and the performance was verified by full-scale in-situ load testing of typical bays before and after strengthening.

Thermal Effects on Concrete Behavior

BIC Alliance, November, 2002

Peter Emmons examines the volume changes in concrete due to temperature change.

An Ounce of Prevention: Chimney Maintenance is More Complex Than You Realize

Plant Services, October 09, 2002

Across the nation, chimneys and stacks rise from industrial facilities like monuments to American industry. But unlike monuments, they are designed to last the life of the plants they serve, usually 25 to 30 years.

Miami's Freedom Tower Shines Again (PDF)

Concrete International, October 1, 2002

Late 1997 was marked by an act of mercy, embellished by a touch of irony, as members of the very community who first benefited from the Freedom Tower's benevolence stepped in to save the building. Shortly thereafter, detailed plans were unveiled to turn the Freedom Tower into a living monument to the Cuban struggle for freedom.

Fallingwater, Standing Still

Architecture, September 10, 2002

Inspired as much by the rocky earth as by De Stijl, Bauhaus, and Richard Neutra, Frank Lloyd Wright emerged from a decade of near-dormancy in 1935 to design Fallingwater, a home in rural Mill Run, Pennsylvania. It was worth the wait; the icon of American design would produce what is arguably the most important and recognizable private residence in the world.

New Life for Bridges and Budgets

Bridge Builder, September/October 2002

A recent survey conducted by the National Cooperative Highway Research Program (NCHRP, Synthesis 249) indicated that sixty-three percent of the North American transportation agencies expect to see the need to increase the live load capacity of existing highway bridges grow as the infrastructure continues to age.

Concrete Construction Top 100 Concrete Contractors - 2002 (PDF)

Concrete Construction, August 9, 2002

Structural Group, a Maryland-based specialty concrete repair contractor, is among the largest concrete contracting companies in the United States, according to Concrete Magazine's CC 100 List. With 2001 revenues of $142 million, Structural Group ranked seventh overall, and first among concrete repair contractors.

Upgrading Parking Structures (PDF)

Parking, June 2002

Repair and strengthening of concrete parking structures is a challenging segment of the concrete repair industry. Repair or strengthening of an existing parking structure may become necessary due to structural inadequacies that adversely affect strength or serviceability of the structure or its members.

Sulfur Recovery Operations Pose Formidable Challenge to Concrete Infrastructure

World Refining, May 2002

A misconception held throughout the industrial manufacturer sector is that "concrete is forever," therefore making it maintenance-free. For all of its seeming permanence, concrete comes under attack from both natural and man-made forces almost from the time it is first placed and finished.

Challenging Environment to Concrete

BIC Newsmagazine, May 2002

Sulfur Recovery Unit (SRU) operations can be the most challenging environment to refinery concrete infrastructure. One of the most aggressive exposure environments for concrete can be found in SRUs.

Strengthening Highway Bridges with CFRP Composites

Concrete Repair Bulliten, May/June 2002

The future growth of nations and their economical prosperity is closely related to the potency of its transportation infrastructure. Bridges, in particular, are one of the most important components of this infrastructure.

'Wrighting' A Fragile Landmark Sagging for Nearly 65 Years

ENR, March 25, 2002

First, the leaning tower of Pisa is rescued. Then, Fallingwater – the sagging house of Pennsylvania. Workers are completing a post-tensioning procedure designed to put a stop to the historic sagging of the hallmark-cantilevered portion of the 64-year-old Fallingwater, designed by Frank Lloyd-Wright.

Post-Tensioning Saves Time on Tunnel Project

Structural Engineer, March 2002

State Route 29 snakes its way through Trenton, New Jersey, along the Delaware River. Just south of downtown, it veers away from the river and proceeds through a residential area. Over the years, increased vehicular traffic on this major artery has contributed to mounting traffic congestion, causing problems for local residents as well as headaches for commuters.

Wright's Fallingwater Going Over the Edge

The Business Monthly, March 2002

One of the most well known by architect Frank Lloyd Wright is undergoing a one-of-a-kind overhaul by a Hanover company. Without the structural repairs, Fallingwater would end up in the very steam it was designed to embody.

Fallingwater Restoration Uncovers More Damage

Civil Engineering, February 2002

The scope of the structural rehabilitation of Fallingwater, Frank Lloyd Wright"s architectural masterpiece in rural western Pennsylvania, has been expanded because of the deteriorated condition of the substructure beneath the floor of the living room.

Fallingwater Gets a Facelift

Pennsylvania Business Central, February 2002

Fallingwater, one of Frank Lloyd Wright"s most distinctive accomplishments and one of the most unique houses ever built in America, is getting a new lease on life with the help of some much needed renovations.

Fighting for the Freedom Tower: Team Returns Historic Miami Structure to its Original Glory

Southeast Construction Magazine, February 2002

A stately Miami tower, once a beacon of hope for more than a half-million Cuban refugees, inched toward the verge of collapse before its rescue by an immigrant family and team of restoration experts.

Upgrading Parking Structures: Techniques and design considerations

The Construction Specifier, November 2001

The repair and strengthening of concrete structures is a challenging and growing segment of the concrete repair industry for both engineers and contractors. The continued economic growth of the United States confronts this industry with distinctively new trials arising from extensive infrastructure renewal.

Structural Group Ranks in Top 5 US Concrete Contractors

MarylandB2B.com, October 22, 2001

Structural Group, a Maryland-based specialty concrete repair contractor, is among the five largest concrete contracting companies in the United States, according to Concrete Magazine's CC 100 List. With 2000 revenues of $134 million, Structural Group ranked fifth overall, and first among concrete repair contractors.

Structural Group Ranks 67th in ENR Magazine's Top 600 Listing

MarylandB2B.com, October 22, 2001

Structural Group, a Maryland-based specialty concrete repair contractor, has scored a 67th place ranking in Engineering News Record (ENR) magazine's annual listing of the Top 600 Specialty Contractors in the United States.

The Top 600 Specialty Contractors

ENR: Engineering News-Record, October 8, 2001

The big construction boom was finally beginning to fade by the middle of 2001. Then, terrorist attacks of Sept. 11 shook the industry, as well as the nation.

Raising the Next Generation of Specialty Contracting Professionals

Concrete Construction, August 2001

Structural Group"s Project Engineer Program develops its national engineering and project management talent, while providing grads with flexible career opportunities.

Precast Polymer Concrete Pump Foundations

Hydrocarbon Processing, August 2001

Corrosion-resistant polymer concrete technology provides better alternatives to conventional pump support systems in refining, petrochemical, and pulp and paper facilities.

Structural Group - Brick and Mortar Streaming

Streaming Media Magazine, July/August 2001

For companies that do not have a financial stake in the success of the streaming media industry, the internal use of streaming today is generally an option, not a necessity. For Structural Group, a 25-year-old company based in Baltimore, streaming media has become an integral part of its core business practices, and has markedly enhanced the performance of the enterprise.

Streaming Media Magazine, July/August 2001

Marc Yeager spent 14 years learning how to repair large concrete structures before he first picked up a video camera in 1997. Since then, working virtually alone, he has produced hundreds of hours of streaming video detailing virtually every aspect of Structural Group's operations.

Is Concrete Really All It's Cracked Up To Be?

World Refining, April 2001

Part 1 of a two-part series: Defined in the simplest possible terms, successful concrete repair integrates new materials with existing materials to form a composite structure that can withstand environmental conditions and operational processes, while at the same time providing extended service life.

Is Concrete Really All It's Cracked Up To Be?

World Refining, April 2001

Part 2 of a two-part series: For industrial plants, concrete repair activities pose challenges that are quite different from those encountered in new concrete construction.

E-Learning Beckons Busy Professionals

ENR: Engineering News-Record, March 28, 2001

E-Learning succeeds best when integrated into everyday business practices, according to Baltimore-based Structural Group, a $130-million-a-year concrete contractor with 840 employees nationwide. The company offers 540 courses online, almost all videotaped and produced in-house on topics such as concrete repair and equipment operation.

Local Firm Rescues Crumbling Freedom Tower

The Daily Record, March 9, 2001

Miami's Freedom Tower, a 76-year-old spire of steel and concrete that once heralded Cuban refugees and housed the Miami News & Metropolis, was crumbling and on the brink of collapse before Structural Preservation Systems Inc. restored its walls and foundation, preparing it for another grand use.

Brick-and-Mortar Streams

Streaming Media Magazine, March 2001

Quite naturally, streaming and other technology-oriented corporations have been quickest in their implementation of streaming in the enterprise. But "old-school" companies - the ones propping up the Dow while many tech sectors languish - should not be counted out of the potential market for streaming products and services.

Opportunities in Enterprise

Streaming Media Magazine, March 2001

By bringing tangible return on investment and increased efficiency, streaming technology is proliferating in the intranets and extranets of corporations - both old-school and new - on a major scale. The enterprise presents real opportunities for streaming product and service providers.

Raising the Next Generation of Specialty Contracting Professionals

The Business Monthly, March 2001

How does a growing specialty contracting organization with a continuing need for new project engineers attract and retain strong talent in a tight professional labor market? Faced with such a challenge, Baltimore-based Structural Group responded by establishing its Project Engineer Program.

Structural Preservation Systems Helps Miami's Architecture with Composites

Advanced Materials & Composites News, February 19, 2001

The Freedom Tower, a 75-year-old architectural landmark and enduring symbol of resilience in the face of adversity, looms large over Miami's skyline. Built in 1925, the sixteen-story stucco office tower is a prime example of Spanish Renaissance revival style, and is said to be modeled after the Giralda Tower in Seville, Spain.

Virage and Structural Preservation Systems Advance Corporate Knowledge Capture and Sharing to Maximize Productivity and Profitability (PDF)

Virage, Inc., December, 2000

Emmons envisioned an intuitive system that would give employees comprehensive and immediate access to the wealth of knowledge stored in their video library. Using the Virage platform, Emmons was able to build a system that has revolutionized how The Structural Group captures and communicates their corporate knowledge.

Structural Group Chipping Away at Concrete Chimney Repair Market

The Daily Record, November 8, 2000

The chimney repair business sounds like small potatoes, but for Structural Group, a $90 million specialty contractor in Hanover, it's a potential source of substantial revenue growth.

Contractor acquires Kansas City firm

Baltimore Business Journal, November 3, 2000

Structural Group, a Hanover-based specialty contractor with national and international projects, said it acquired Pullman Power Products Corp. of Kansas City, Mo., from RESCO Holdings Inc.

Built From the Bottom Up, New Fenders Skirt Tappan Zee

ENR: Engineering News-Record, December 20, 1999

By switching the construction scheme from a top-down, gantry approach to a bottom-up sub-cap or stay-lathe system, a marine joint venture contractor beat the second place bid by $5 million and won a $33-million contract to replace the fenders for the Tappan Zee Bridge's two main piers.

Interview with Peter Emmons

Concrete Construction, May 1999

Structural Preservation Systems' president talks about the concrete repair market, strategic alliances, sharing leadership, and managing growth.

Chemical Independence

ENR: Engineering News-Record, February, 15 1999

One place project participants are being extra careful is in the blast containment wall's concrete placement. The 20-in.-thick wall is so heavily reinforced that workers for Anniston site contractor Bechtel National Inc., San Francisco, had trouble last spring fitting vibrators between the No. 11 rebar to remove air.

New York Airport Experiments with Epoxy System on Runways

ENR: Engineering News-Record, November 16, 1998

The Port Authority of New York and New Jersey was faced with two concrete runway decks in need of resurfacing and limited time to do the work. So officials turned to an epoxy-based overlay system that allowed intermittent staging and avoided runway closures.

Load Checks Get Easier, Cheaper

ENR: Engineering News-Record, October 6, 1997

The practice and popularity of checking load capacity of repairs on structures may be turned on its head if a test method recently brought over from Europe finds widespread acceptance in the U.S. Rather than spending days using traditional tools such as large water-filled bladders or educated guesses, testers use off-the-shelf electronics and hydraulic equipment to apply and measure loads in hours.

Structural Preservation Systems, Inc Wins ICRI Project of The Year 1996

ICRI Concrete Repair Bulletin, April 1997

Peeling, blistering paint observed in the ring tank of one of the premier aquarium facilities worldwide prompted concern. When the floor of the biofilter pump room collapsed, remedial work became mandatory.

Carbon Fibers Gain Strength

ENR: Engineering News-Record, March 10, 1997

In a move that may finally launch the widespread commercial use of composite sheets in U.S. building construction, a chemical manufacturer and a large concrete contractor have joined forces to market a new structural repair system.

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