![]() Worst case, but sometimes necessary, would be to jackhammer out the existing concrete and re-pour with properly placed bolts. Bolts poured too low can be extended with couplers or welded extensions, and bolts too high can be cut off and re-threaded. Out-of- place bolts can be repositioned by drilling and adding epoxy anchors. When that occurs, there are many various remedies approved by the AISC. The most common error is to position the anchor bolts incorrectly, whether out of place, too low or too high. A good solution is using post-installed anchors.” Often, the location of the anchor bolt can shift while the concrete is being poured, or can be difficult to maintain its location. That is the benefit of post-installed anchors, the location of the attachment can be determined after the frame has been erected. It is difficult to determine the correct location of cast-in-place anchors. “ allow an anchor to be installed after the concrete has cured and allows more flexibility in the anchor location. Mike Steiber, senior product manager of mechanical anchor systems, Simpson Strong- Tie, Pleasanton, Calif., claims the most common type of concrete anchor systems are cast-in-placeJ-bolts. The piers and anchor bolts work with the steel design, the panels and the roof to complete one cohesive design and system.” Types of Anchor Bolts The piers and anchor bolts also act to tie the entire building design together. “Metal buildings act as large kites in high winds and the footer/ foundation is the primary reason they stay in/on the ground. Quarture Jr., outside sales manager, Mohawk Construction and Supply Co. “They do to a certain extent, but the primary reason for large footer and pier pads is that they act as counterweights to weigh down the building and keep it on the ground,” says Robert J. Most people commonly think that the foundation or footer support a building. “They help stabilize the steel framing during erection, and they may help transfer horizontal and vertical loads from the framing to the foundation.” “Anchor bolts serve two functions,” says Alexander Newman, PE, a forensic structural engineer in the Boston area and author of a book titled, “Metal Building Systems,” now in its third edition. ![]() For this stability, structural steel columns are supported by high-strength anchor bolts embedded in the foundation’s concrete. The foundation provides stability and prevents extreme building movement to protect the building and its contents from damage or failure. The sturdiness and strength of a metal building is only as solid as the foundation it rests on. ![]()
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