Burned Holes in Bearing Type Connections.
Burned Holes in Bearing Type Connections.
(OP)
What Problems arise when you have uneven bolt holes in a bearing type connection? I have a situation where I am relying on bearing, but unfortunately the contractor burned the holes versus punched holes. Does this cause the connection to become slip-critical?





RE: Burned Holes in Bearing Type Connections.
Dik
RE: Burned Holes in Bearing Type Connections.
RE: Burned Holes in Bearing Type Connections.
http://www.boltcouncil.org/guide1.htm
www.SlideRuleEra.net
RE: Burned Holes in Bearing Type Connections.
Does this cause the connection to become slip-critical - no, the action of burning oversized holes doesn't itself cause the connection to be slip critical. In fact most bearing connection bolts are not even tensioned to the required level to achieve a slip critical connection. Typically they are simply snug tighten with a spud wrench and ironworker effort which may be different in the morning than the afternoon.
Even slip critical connections are designed using only minimal increase in bolt holes, the reason is that in the ultimate condition of slip, the connection is expected to resist load in bearing. This adds some redundancy.
Ream the burnt holes and use oversize bolts.
Regards,

Qshake
Eng-Tips Forums:Real Solutions for Real Problems Really Quick.
RE: Burned Holes in Bearing Type Connections.