When can they start setting precast
When can they start setting precast
(OP)
Situation: Concrete foundation walls poured today. Type 1 cement (no accelerating admix).
The contractor is wondering when he will be able to start setting precast wall panels (single story, 33' high) on the foundation wall. My first response was after 7 days of curing. Is that too early?
The contractor is wondering when he will be able to start setting precast wall panels (single story, 33' high) on the foundation wall. My first response was after 7 days of curing. Is that too early?






RE: When can they start setting precast
I suspect it would be fine given that there won't be any live loads, snow loads, etc in place.
Peer reviewing precast structures, we usually insist on cast in place reaching it's 28 day strength prior to erecting precast or a letter from the EOR stating that early erection is ok.
RE: When can they start setting precast
RE: When can they start setting precast
Thanks for the input. Considering that conc under normal circumstances would gain 70% of its strength in 24 hrs (correct me if I am wrong), your 48 hrs response makes sense. May be I'll tack at least a couple more days on just to feel better, so 4 days with a break showing min 2000 psi.
RE: When can they start setting precast
RE: When can they start setting precast
RE: When can they start setting precast
Dik
RE: When can they start setting precast
Mike McCann
MMC Engineering