How do I install a retaining angle on a fire damper in a masonry wall?

Position the damper sleeve centered in the wall penetration. Place the pre-formed steel retaining angles (1\frac{1}{2}\text{ in} \times 1\frac{1}{2}\text{ in} minimum) tight against the masonry surface on all four sides of the sleeve perimeter. Fasten the angles directly to the damper sleeve using approved screws or welds spaced per manufacturer instructions. Do not anchor the angle directly into the masonry wall.

['Position the damper sleeve centered in the wall penetration. Place the pre-formed steel retaining angles (1\\frac{1}{2}\\text{ in} \\times 1\\frac{1}{2}\\text{ in} minimum) tight against the masonry surface on all four sides of the sleeve perimeter. Fasten the angles directly to the damper sleeve using approved screws or welds spaced per manufacturer instructions. Do not anchor the angle directly into the masonry wall. ']

Stop if

• Use this as training guidance. The foreman, approved drawings, project specs, manufacturer installation instructions, employer safety policy, and AHJ/code requirements always control the final answer.

Check

• Position the damper sleeve centered in the wall penetration. Place the pre-formed steel retaining angles (1\frac{1}{2}\text{ in} \times 1\frac{1}{2}\text{ in} minimum) tight against the masonry surface on all four sides of the sleeve perimeter. Fasten the an

Steps

• Stop and verify the approved detail, manufacturer instructions, foreman direction, and project specs before touching it.
• Position the damper sleeve centered in the wall penetration. Place the pre-formed steel retaining angles (1\frac{1}{2}\text{ in} \times 1\frac{1}{2}\text{ in} minimum) tight against...

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