Timber Trench Shoring
Timber Trench Shoring
(OP)
Does anyone have any tips on designing timber trench shoring. This should be easy, but I am missing something. The method of shoring the contractor has proposed is with vertical wood planking which are 3X8 or 4x6 douglas fir with a bending strength of 1500 psi. The system consistes of these vertical planks with wales and 2 struts, wales and struts are located 3' from the bottom of the pit and 2' from the top. I analyized the verticals like a simple beam with the struts as rollers and the retained soil as the loading, but I can not get any of the proposed sizes to work, even though the contractor has had the system reviewed in another state and it worked, basically I am recertifing for my state.
I even found tables here saying these memebers should work http:/ /www.seton resourcece nter.com/C FR/29CFR/1 926150.htm
I even found tables here saying these memebers should work http:/






RE: Timber Trench Shoring
Could you be figuring soil loads more conservatively than what the tabulated values assume?
RE: Timber Trench Shoring
RE: Timber Trench Shoring
...however, see the "California Trenching & Shoring Manual" at this link
htt
In particular, see Chapter 5.
www.SlideRuleEra.net
RE: Timber Trench Shoring
thank you for the CA shoring manual that looks like a great starting point. I have to say the CA DOT always has great resources.