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screw/bolts into tapped holes

screw/bolts into tapped holes

screw/bolts into tapped holes

(OP)
I was wondering if anyone has any information/codes on using tapped bolts for structural/ building applications.  I have talked with AISC and they are really no help.  I have a european client and they use this type of fastener all of the time.  I know that it is used in many other industries in the U.S. also but I can't seem to find any info.  Also if you have data/references for the tapped screw/bolt allowable loads.

Thank You

RE: screw/bolts into tapped holes

When you are bolting into a tapped hole the fastener is defined as a cap screw rather than a bolt. Cap screws have slightly tighter controls and a few variations from typical bolts. This is probably why AISC doesn't get into it.  I am not aware of any specifications written for tapping structural bolts.  The closest thing I know of is the "Naval Ships Technical Manual Chapter 075- Fasteners"  It is available on the web at  http://www.metalwebnews.org/fastners.pdf
Section 7.6 covers fasteners in tapped holes and has some tables of minimum depth of tapped holes.  All the other documentation I have seen simply states that the depth of the tapped hole should be sufficient to develop the full strength of the fastener.

Good Luck

RE: screw/bolts into tapped holes

RockEngineer

Thanks for the link. Most engineers probably don't realize the amount of excellent reference manuals available from the Navy and the Corps of Engineers.

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