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Re: Anchor Bolts & Pre-engineered Buildings[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: seaint(--nospam--at)seaint.org
- Subject: Re: Anchor Bolts & Pre-engineered Buildings
- From: "Bill Sherman" <SHERMANWC(--nospam--at)cdm.com>
- Date: 26 Jan 99 10:06:22 -0500
Richard Lewis wrote: > I have designed buildings for almost 15 years now, including quite a few pre-engineered buildings. I have always required the building supplier to design the anchor bolts and never had much of a problem with that requirement. This particular building supplier is making a big fuss about having to design the anchor bolts, which includes embedment, etc. Have I been wrong to require the supplier to completely design the anchor bolts in the past? Prior to getting the calcs, I do not have firm numbers on reactions to design the bolts myself. Now, if I design the bolts and the contractor doesn't like it, does he have a legitimate claim for an extra? < I specify that the anchor bolts shall be sized by the pre-engineered building manufacturer, but I also typically show a minimum embedment depth on the drawings and call for a minimum 3/4" diameter anchor bolt. Or in some cases, I've given a table of anchor bolt embedment vs bolt diameter on the drawings (also intended to cover equipment anchor bolts of various diameters). I did have one building manufacturer resist designing the anchor bolts but I pointed out that it was a contract requirement, and I pointed out that I could not have adequate information to design anchor bolts prior to the manufacturer's building design. I think the building manufacturer should be responsible for sizing the diameter and location of anchor bolts but the foundation designer should be responsible for bolt embedment and load transfer within the foundation. I generally estimate the building reactions and list the assumed reactions on the drawing, and state that the foundation must be confirmed by the responsible engineer for the actual building reactions. I also specify that the contractor will be responsible for changes to the foundation due to deviations required by the manufacturer's building design.
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