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RE: Holes in Steel beams

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The analysis of both steel and concrete beams with web holes involves an 
understanding of Vierendeel truss effects that can cause localized secondary 
 moments in addition to the sharing of flexural beam and shear stresses based 
 on the respective stiffness of the remaining upper and lower sections of 
the beam at the web hole.

D. Matthew Stuart, P.E., S.E., F.ASCE, F.SEI, SECB, MgtEng
Structural Division Manager
Pennoni Associates Inc.
Office 215-222-3000 x7895
Mobile 908-309-8657 | mstuart(--nospam--at)

-----Original Message-----
From: seaint-seaosc(--nospam--at) [mailto:seaint-seaosc(--nospam--at)] On 
Behalf Of Paul Ransom Sent: Sunday, October 05, 2014 3:55 PM
To: seaint-seaosc(--nospam--at)
Subject: Re: [SEAINT-SEAOSC] Holes in Steel beams

OWSJ are analyzed as discrete chord and web elements whereas a beam with a 
hole is usually analyzed as a single beam element by standard means.

I am surprised at the response from AISC. The guide provides appropriate 
conditions to avoid extraordinary engineering effort. Drill and reinforce 
but the pipe may not be the appropriate reinforcement.


Paul Ransom, P.Eng.

> Date: Fri, 3 Oct 2014 13:10:30 -0500
> From: Himanshu Goyal <himanshuagoyal(--nospam--at)>
> Subject: Re: Holes in Steel beams
> Open web joist, trusses, these are all beams with openings thru the web.
> Need to make sure that opening is away from any concentrated force
> and if required add steel reinforcing next to opening to compensate

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