large hole in steel I-beam
large hole in steel I-beam
(OP)
Hello fellow Structural Engineers,
I am supporting a floor with 100 psf Live Load with a 16" steel beam. However, I have been asked to have a 13" diameter hole. What design guide is available to check such a larger hole in a steel beam?
I can deepen the beam to as much as 24" but I am looking to minimize the depth.
Thank you for your help!
I appreciate it.
I am supporting a floor with 100 psf Live Load with a 16" steel beam. However, I have been asked to have a 13" diameter hole. What design guide is available to check such a larger hole in a steel beam?
I can deepen the beam to as much as 24" but I am looking to minimize the depth.
Thank you for your help!
I appreciate it.






RE: large hole in steel I-beam
RE: large hole in steel I-beam
AS4100 (Australia Steel Code) says:
Except for a castellated member, an opening in a web may be unstiffened provided that the greatest internal dimension of the opening (lw) satisfies either-
(a) lw/d<=0.1 for webs with longitudinal stiffeners; or
(b) lw/d<=0.33 for longitudinally stiffened webs,
provided that the longitudinal distance between boundaries of adjacent openings is at least three times the greatest internal dimension of the opening.
In addition, not more than one unstiffened opening shall be provided at any cross-section unless a rational analysis shows that stiffeners are not necessary.
The design of a castellated member or a member with stiffened openings shall be based on a rational analysis.
I had a client who asked me to provide holes in the webs of a member so that they could pass through pipes. The dimension of the opening was very small and I located the openings in low stress regions and provided longitudinal stiffeners anyway.
thread507-187710: Web Holes
thread723-175950: DESIGN I-SECTION WITH WEB OPENINGS
RE: large hole in steel I-beam
RE: large hole in steel I-beam
BA