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Re: Nailer on Masory Wall

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Most effective method of connecting a wood nailer(ledger) AND to avoid X-grain bending is to place two (2) anchor bolts (staggered) within the masonry wall a distance equal to the depth of the ledger. This will usually require a deeper ledger than would normally be required. Eg. for a calculated 2X10 you would use a 2X12 and locate the ab's min 3" from the top and 3" from the bottom of nailer thereby "fixing" the nailer in place and reducing the danger of X-grain bending.  

--- On Fri, 5/22/09, Doug Mayer <doug.mayer(--nospam--at)taylorteter.com> wrote:

From: Doug Mayer <doug.mayer(--nospam--at)taylorteter.com>
Subject: Nailer on Masory Wall
To: seaint(--nospam--at)seaint.org
Date: Friday, May 22, 2009, 12:11 PM

Situation:  typical nailer on top of a cmu wall.  Joists bearing on nailer and ties (H2.5) connecting joist to nailer for uplift.

Problem: DSA (California) backcheck comment believes that cross-grain bending of the nailer needs to be avoided and to design direct connection to cmu wall.

 

I have never seen the code address cross-grain bending in anything other than lateral anchorage of masonry/concrete walls to diaphragms.  Does the code somewhere specify that cross-grain bending in this situation is not allowed?  Any help would be appreciated.

 

TIA,

 

Doug Mayer, SE

Structural Engineer