Countersunk Bolt Steel Plate
Countersunk Bolt Steel Plate
(OP)
Hi,
I'm working on a connection detail for a curtain wall. The window manufacturer wants to use 3/8" dia countersunk bolts (tapered head)in a 1/2" thick plate. The bolts will have about 1.2kip factored tension. Can someone point me to a reference for checking the pullout capacity?
Thanks.
I'm working on a connection detail for a curtain wall. The window manufacturer wants to use 3/8" dia countersunk bolts (tapered head)in a 1/2" thick plate. The bolts will have about 1.2kip factored tension. Can someone point me to a reference for checking the pullout capacity?
Thanks.






RE: Countersunk Bolt Steel Plate
RE: Countersunk Bolt Steel Plate
http://www.icc-es.org/Reports/pdf_files/ESR-2196.p...
RE: Countersunk Bolt Steel Plate
The Flat head/countersunk torque spec is about 1/2 that of regular SHCS. I think the reduction must mostly be based on the head strength.
Approximate FH clamp force would be over 3000 lbs.
http://www.spaenaur.com/pdf/sectionD/D48.pdf
RE: Countersunk Bolt Steel Plate
The recommended installation torque is reduced for a FHCS because the tool size is smaller- a 3/8" FHCS has a 7/32" hex, while a 3/8" SHCS has a 5/16" hex. Big difference.
From experience, a FHCS will fail in tension way, way before the head will pull out of any steel or aluminum part I've ever used.
RE: Countersunk Bolt Steel Plate
Thanks CANPRO.....I can buy that logic, using the tables for weaker materials.
Based on comments from Tmoose and jgKRI, my loads seem small and should be ok.