From page 5 of the SSMA Product Technical Information catalog, ICBO ER-4943P, punchouts have a maximum width of half the member depth or 2.5", whichever is less and a maximum length of 4.5". Minimum spacing is 24", minimum distance from end of stud to the near edge of the punch out is 10". Here's the link:
Hope this helps.
Wade Sticht, PE
On Fri, Feb 29, 2008 at 5:56 AM, Jerry Coombs <JCoombs@carollo.com> wrote:
I don't believe there is any prescriptive guideline.For highly-loaded sluds, it likely needs to be calculated, which is why the Codes require a stamp for anything outside simple prescriptive "designs"The design for how it is loaded is just like any other beam/ col. Relatively easy to calc the properties and design for the 5 psf loadHowever you CAN take, and justify, a relatively prescriptive approach. Look at your size/ gage of stud. measure the extent of the hole from "butchering. If the hole is no larger than the typical size of the hole in a punched stud, use the load table for punched. If the application works for the punched stud (very likely), it'll work fairly conservatively for your stud.JDCAnyone aware of a prescriptive code requirement or SSMA guideline or
something for how much web can be butchered out interior partition steel
studs to get plumbing through?
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