August 26, 2014
Much of the working development length of the anchorage is hidden from view due to embedment into building construction materials, such as brick, stone, mortar, wood, and concrete. In industrial facilities, anchorage of process stream lines, vessels, and rotating/reciprocating equipment onto supporting foundations is handled by threaded metal rods embedded into conventionally reinforced concrete. Unfortunately, the condition of the ‘business end’ of the anchor bolt is unknown until an owner/operator experiences an unfortunate event in the form of: Bolt tensile failure Pullout (concrete...
August 26, 2014
Several strategies are available to reestablish anchor bolt integrity. Anchor bolts restoration strategies can be as follows: Repair existing anchor bolts Near surface separated anchor bolts can be repaired using mechanical couplings or welding stud extensions. Both techniques remove and replace anchor bolt threaded regions damaged by corrosion, lateral shear, or vertical ‘cup and cone’ failures. Property installed and incorporating appropriate metallurgical detailing, repairs as described can add significant service life to the existing anchor bolt system, once the ‘root cause’ of the...