Using additional structural steel shapes that transfer load to the building floor

Seismic Restraints for Mechanical Equipment Using additional structural steel shapes that transfer load to the building floor

bolts and then attach steel shapes to the building with concrete anchors, steel bolts or welding. When bolting to concrete, use post-installed anchors, embedded headed studs, or embedded J-bolts.

Five different configurations for using angles to attach equipment to the building structure are shown in the following figures.

Full-size angles on each side of equipment: Figure 71.
Four or more angles on each side of equipment bolted to the concrete floor/pad: Figure 72.
Four or more angles welded to equipment and bolted to the floor/pad: Figure 73.
Four or more angles on each side of equipment welded to embedded plates: Figure 74.
Three or more angles used to bolt down equipment with a round base: Figure 75.

***Figure 71:*** *Two angles used to attach the equipment to the building.*

**Figure 72:** *Four or more angles used to attach the equipment to the building.*

**Figure 73:** *Four or more angles welded to equipment and bolted to the floor/pad.*

**Figure 74:** *Four or more angles on each side of equipment welded to embedded plates. Figure 149 gives examples of embedded steel plates.*

***Figure 75:*** *Three or more angles used to bolt down equipment with a round base.*

Step 1: Determine where to bolt the equipment

Accurately draw the bolt pattern on the floor, concrete pad, or steel beams using one of the following methods:

Set the equipment in place and mark the holes.
Make a template.
Use measurements and shop drawings to lay out the bolt hole pattern.

You may drill additional holes into the equipment assembly or building steel beams as shown on construction drawings or the manufacturer’s instructions.

USE CAUTION WHEN DRILLING INTO EQUIPMENT. Internal components can be damaged or the manufacturer’s warranty may be voided. DO NOT DRILL OVERSIZED HOLES.

New holes cannot be oversized or oval in shape. Repair oversized holes as shown in Figure 70, if necessary.

Step 2: Install anchors

If the equipment is to be anchored to concrete, drill and install post-installed anchors or pour concrete with embedded studs or J-bolts.

If the equipment is to be bolted to steel, drill holes in the steel as shown on construction drawings or the manufacturer’s instructions.

Step 3: Move the equipment into place

BE CAREFUL NOT TO DAMAGE THE ANCHORS WHEN SETTING THE EQUIPMENT.

You may bolt or weld angles to the equipment before moving the equipment into place.

Step 4: Attach nuts or weld equipment

Attach nuts to the anchor/bolt and torque.

Piping, ductwork, and raceways may be connected.

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