Rigid connection to the building structure using four threaded vertical rods with horizontal cable supports

Seismic Restraints for Mechanical Equipment Rigid connection to the building structure using four threaded vertical rods with horizontal cable supports

Equipment should have pre-installed brackets that can support attachment to the building.

***Figure 94:*** *Rigid connection to the building structure.*

Cables provide horizontal restraint for seismic loads and should not be used to support the equipment weight.

Step 1: Attach the equipment to the building structure using threaded rods and anchors

Lay out all attachment points before anchoring. For building structure attachment details, see Figures 95-100. For instructions on bolting directly to the building structure, see Steel Bolt Connections.

**Figure 95.** *Cast-in-place anchor; concrete fill on steel deck.*

**Figure 96.** *Post-installed anchor; concrete fill on steel deck.*

***Figure 97:*** *Wood beam construction.*

For edge distances and spacing, see Lag Bolts

Use center load beam clamps for vertical loads. Do not use for cables, rods, or structural members positioned at an angle.

***Figure 100:*** *Concrete slab construction.*

Step 2: Add rod stiffeners

Step 3: Attach anchors to the building structure for cable attachment

Figure 102 shows typical anchorage to different building construction. See Anchors.

Step 4: Attach cable to the building structure.

For cable assembly instructions, see Cables.

For details on attaching cable to the building structure.

***Figure 102:*** *Attachment of cable to the building structure.*

Step 5: Attach cables to equipment

For details on attaching cable to the equipment, see Figure 103

**Figure 103:** *Attachment of cable to equipment.*

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