Secure Your Building: Rooftop Heating Unit/Duct

Dare to Prepare

Earthquake Readiness Campaign

Disclaimer: The effects, descriptions, recommendations, and suggestions included in this web site are intended to improve earthquake preparedness; however, they do not guarantee the safety of an individual or a structure. The Earthquake Country Alliance (ECA) takes responsibility for the inclusion of materials from various sources on these pages. The State of California, the Seismic Safety Commission, the ECA and all contributors to this document do not assume liability for any injury, death, property damage, loss of revenue, or any other effect of an earthquake.

Rooftop Heating Unit/Duct

Larger imageRooftop Heating Unit or Duct with Metal Straps

Source: Noson, Perbix, SSD

Purpose

To secure unit or duct to roof.

Recommendation

Install metal straps; brace unit supports

Supplies Required

Metal straps (18 gage x 2")
Sheet metal screws—No. 10 x 3/4"
Angle—1-1/2" x 1-1/2" x 1/4"

Installation

To attach metal straps to the unit or duct, follow these steps:

Wrap metal straps around heating/duct unit at each support location.
Attach metal strap to existing supports of the unit with screws.

To brace the unit or duct to the roof and strengthen the existing supporting, follow this step:

Weld or screw top and bottom of the angles to the existing supports.

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Created in the SCEC

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Last modified: May 22 2007 21:28

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Southern California Earthquake Center @