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FEMA 453 Design Guidance for Shelters and Safe Rooms

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Precast concrete frames <strong>and</strong> shearwalls consist of precast concrete<br />

planks, tees, or double-tees supported on precast concrete girders<br />

<strong>and</strong> precast columns (see Figure 2-34). Lateral <strong>for</strong>ces are resisted<br />

by precast or cast-in-place concrete shear walls. Diaphragms<br />

consist of precast elements interconnected with welded inserts,<br />

cast-in-place closure strips, or rein<strong>for</strong>ced concrete topping slabs.<br />

Structural deSign criteria<br />

Figure 2-<br />

Pc tilt-up concrete<br />

shearwalls<br />

2-

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