Secure Your Building: Secure Walls to Roof or Floor

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.

Secure Concrete or Masonry Walls to Roof or Floor: Solution 2

Purpose

To anchor the walls to the roof/floor.

Recommendation

Larger imageJoists Parallel to Wall

Source: Noson, Perbix, SSD

Install LTT anchors.

Supplies Required

LTT anchors (manufactured by Simpson or equivalent)
Thru-bolt—3/4" diameter
Washer—3/8" x 6" diameter
2x___ blocking (depth to match existing joist depth)

Installation

Larger imageWall Section

Source: Noson, Perbix, SSD

Install LTT anchors approximately every 4' on center.
Where existing joists are perpendicular to the wall, attached anchors to the sides at the top or bottom of the joists.
Where existing joists are parallel to the wall, install blocking to two joist spaces at the LTT anchor locations. Install anchors above or below blocking.

Note

If washers are not desired, as in historic buildings or terra cotta exteriors, epoxy an all-thread rod inserted into the wall a minimum 8".

Larger imageJoists Perpendicular to Wall

Source: Noson, Perbix, SSD

Source: Noson, Perbix, SSD

This campaign receives major sponsorship from:

Created in the SCEC

system

Last modified: May 24 2007 16:39

© 2008

Southern California Earthquake Center @