Need a book? Engineering books recommendations...
RE: hooked ABs and ABs with bearing plates[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: <seaint(--nospam--at)seaint.org>
- Subject: RE: hooked ABs and ABs with bearing plates
- From: <William.Sherman(--nospam--at)CH2M.com>
- Date: Wed, 6 Aug 2008 08:56:24 -0600
- Accept-language: en-US
- Acceptlanguage: en-US
I believe that the ACI 349 anchor bolt embedment method used to require that the tensile area of the pullout cone be reduced by the area of any bearing plates provided at the head (not sure if the current provisions address this). As Harold noted, research showed that bearing plates could be detrimental because of reduced bond to the concrete below the bearing plate. Bearing plates were provided mainly to reduce bearing stresses at the head - but research has shown that a standard bolt head is adequate to develop the anchor in tension via bearing on concrete. This does create high bearing stresses which also have a lateral component, requiring adequate side cover.
As with others, I then stopped using bearing plates at embedded anchor bolts - also stopped using hooked anchor bolts, since headed bolts were found to perform better.
CH2M HILL / DEN
- Prev by Subject: Re: hooked ABs ... & angels
- Next by Subject: HUD 7584 - Question
- Previous by thread: RE: hooked ABs
- Next by thread: ASTM A513 Tube Specs.