The bracing supplier will normally employ the services of a delegated engineer who designs the braces and their connections for wind loads. The delegated engineer will rarely have a contract or the authority to design the slab-on-ground. In fact, the slab-on-ground could very well be in place at the time the bracing design is completed. Finally, all bidders can argue that they would risk losing the contract if they were to include services not indicated in the contract documents.
Asce 37 02 Design Loads On Structures During Construction 28
Per Section 8 of the TCA bracing guidelines, the floor slab, footing, or deadmen should be designed with sufficient strength and weight to resist the applied brace loads, using a minimum safety factor of 1.5. The section provides a method for estimating the required thickness of a floor slab to safely anchor wall braces and recommends the designer consider the type and location of joints, the thickness and reinforcement in the slab, the strength of the concrete in the slab, and the size and location of slab closure strips. For sliding resistance, a friction coefficient of 0.5 is recommended.
Clearly, such tall walls are going to create numerous challenges that are outside the scope of this article. Knowing that the elevation of the upper brace connections will be about 60 percent of the panel height and the distance from the face of the panel to the lower brace connections will be 33 to 40 percent of the panel height, the building designer should consider numerous questions before the construction documents are issued, including: 2ff7e9595c
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