Understanding Anchor Bolts in Pre-Engineered Buildings (PEBs)
"AISI E 1 is for wall studs, not foundations." Fact: Volume II Part VII explicitly covers embedded cold-formed steel devices in concrete. It is the correct reference. aisi e 1 volume ii part vii anchor bolt chairs better
are heavily engineered stiffened assemblies welded to structural shells that optimize structural safety, wind resistance, and seismic survival. Published by the American Iron and Steel Institute (AISI) under its authoritative Steel Plate Engineering Data , this specific design methodology provides empirical formulas to safely distribute enormous eccentric tensile loads from anchor bolts into thin-walled vessel or tank shells. Without these properly designed chairs, severe localized secondary bending forces would deform, buckle, or rupture the shell wall under high wind overturning moments or seismic uplift. Published by the American Iron and Steel Institute
In heavy industrial construction, steel is expensive and heavy. Over-designing a hundred anchor bolt chairs on a massive tank farm wastes thousands of dollars. The AISI formulas allow you to find the ideal thickness for the chair's top plate, vertical stiffeners, and the vessel shell itself. 3. Prevents Localized Shell Buckling Over-designing a hundred anchor bolt chairs on a
Calculate the minimum width and thickness required to resist bending moments caused by the bolt tension.