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Re: OSHA 4-Bolt Column Requirements and Pre-Engineered Buildings

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I participated in a forensic investigation a couple of years ago that
concerned collapse of a partially-constructed metal (pre-engineered)
building frame.  Those four bolts per column would likely have saved the
legs of an unfortunate workman. I think OSHA is reacting to this and
other similar cases.

Russ Nester, SE, CE


On Thu, 14 Jun 2001 12:20:07 -0500 "Effland, Greg"
<geeffland(--nospam--at)> writes:
> Once the OHSA regulation is put into action any column over 300 lbs 
> (most
> columns and endposts) will require a minimum of 4 anchor bolts.  
> Probably
> will not see much affect on the base plate thickness (at least not 
> thicker).
> HTH, 
> Greg Effland, P.E. 
> KC MO 
> -----Original Message-----
> From: Mark D. Anderson PE [mailto:mark(--nospam--at)]
> Sent: Thursday, June 14, 2001 11:26 AM
> To: seaint(--nospam--at)
> Subject: OSHA 4-Bolt Column Requirements and Pre-Engineered 
> Buildings
> Has any one determined how the new OSHA 4-bolt requirement for 
> column
> anchoring (Federal Register 63:43451-43513) will be applicable to 
> the metal
> building industry?   Specifically for the primary frames?  
> Historically,
> most of these buildings, at least the small to mid-size ones, have a 
> two
> bolt anchorage, with a light baseplate.
> It appears that the MBMA was represented in the proceedings, but I 
> cannot
> readily see where their products are exempted.
> Thank you
> Mark D. Anderson  PE
> Anchorage, AK

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