Sway braces

System foundation. Provide lateral and longitudinal sway bracing. Use diesel drivers for fire pumps. Use of PVC underground pipe. 

Sway brace- Metal straps or wood blocks installed diagonally on the inside of a wall from bottom to top plate, to prevent the wall from twisting, racking, or falling over "domino" fashion. 

Leg supports may be braced or unbraced. Braced legs are those which are reinforced with either cross-bracing or swaybracing. Sway braces are the diagonal members which transfer the horizontal loads, but unlike cross braces, they operate in tension only. The diagonal members in a sway-braced system are called tie rods, which transfer the load to each adjacent panel. Turnbucldes may be used for adjustments of the tie rods. 

Sway-bracing. Sway braces are tension only members, not connected at the center. There is one per panel alternating in each adjacent panel. 

Legs can be either cross-braced or sway-braced. Of the two bracing methods, sway-bracing is the more common. Sway-bracing is for tension-only members. Cross-bracing is used for tension and compression members. When used, cross-bracing is usually pinned at the center to reduce the. sizes of the members in compression. 

Note Loads in sway bracing are tension only. Area of bracing required, Abr Abt = f/Ft... 

Horizontal Forces on Ring Beam In the analysis for in-plane bending moment and thrust, the wind or seismic force is assumed to be transferred to the girder by a sine-distributed tangential shear. (See Figure 6-7.) These loads are resisted by the horizontal reaction components of the sway bracing as shown in Figure 6-8. 

Note Loads in sway bracing are tension only ... 

Columns for spheres that are high pressure, liquid loaded, heavy wall or in high seismic areas are best with cross bracing. Conversely, columns for spheres in low seismic areas, gas filled or light wall are best with sway bracing. 

Sway braces or vibration dampeners should be used to control the movement of piping due to vibration. 

Booster-External Tank Attachment Ring, Aft Avionics and Sway Braces... 

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