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Lap Splices for Restoration Projects[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: SEAINT <seaint(--nospam--at)seaint.org>
- Subject: Lap Splices for Restoration Projects
- From: Jim Kestner <jkestner(--nospam--at)somervilleinc.com>
- Date: Mon, 23 Aug 1999 14:35:29 -0500
We are currently working on a concrete restoration project. This is an older structure, built in 1921. (before the high bond deformation bars were used). There may be some instances where some rebar has lost a significant enough area to splice a new bar in. The CRSI publication, "Evaluation of Reinforcing Steel Systems in Old Reinforced Concrete Structures" recommends adding 10% to current lap lengths. The reason stated is the old bars were 50% effective in bond plus the steel yield being 33 v. 60 ksi gives a 10% difference in lap length. The Sika rep. thinks these lap lengths are longer than what is normally used. What am I missing here? An alternative might be welding, but I would prefer to avoid this if I can. Jim Kestner, P.E. Green Bay, Wi.
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