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First, a big thank you to those who commented and emailed ideas and topics that contributed to the latest tool for this site - the Trapeze Calculator.
Quick Calc With only a few "knowns" (pipe diameter and schedule, and distances to nearest structure), you can now quickly calculate the section modulus that's required, visit options for the trapeze bar, and see these options schematically in a to-scale detail. Multiple Pipes Have multiple pipes on a trapeze? Calculate the section modulus required for each, add the two moduli together, and simply override the Section Modulus Required value below to see your options. Get CAD Details Want a CAD version of the detail? Sure thing - the downloadable All-Access Toolkit allows you to save and print these calculations as PDFs, which can then be imported directly into AutoCAD and use the ALIGN function to scale it to your drawing. Toolkit Users Already a Toolkit user? Install the latest version from your dashboard to get the updates to this tool. No new activation code is necessary. Don't see the tool below? Try it out here - This site is all about finding ways to help you be the office hero with quick and helpful fire protection tools. Get these weekly articles straight to your inbox by subscribing here.
Dave
5/24/2019 01:52:46 pm
Several rambling thoughts - I admit I used to apply whatever strut section modulus I had on my binder and apply it no matter if my purchaser bought Powerstrut, Unistrut, Superstrut, or Hilti that week. Now that I'm on the Dark Side side, I'm scrutinizing a submittal today where the designer has conflicting info on what they are using. And I know it doesn't guarantee what they will purchase to install. Then on another blog, a PE is implying that once we stray from pipe or angle in the NFPA table, then were are accepting the liability of engineering work. I think that is an extreme take, I would think 9.1.1.7.2 (2016) gives us the leeway. How about the requirement for slots in angle to be no more than 1/16" wider than the rod. Does this apply to the slotted strut we all use, or because it's not an angle, technically it doesn't apply? Oh, and how about using strut-nuts, spring-loaded or not. I hate to see people count on that to hold the suspended pipe.
Eric Blackwell
7/9/2020 06:34:31 am
Just something I noticed. The rod size for 10" sch. 10 pipe is incorrect. Per tables 9.1.2.1, & 9.1.3.10.1, & 9.1.4.5.1 of NFPA 13, 2016 edition, the minimum rod size is 5/8". Great tools in this program.
Joe Meyer
7/9/2020 06:37:09 am
Hey thanks for the feedback Eric. I'll dig into this and make updates shortly. Really appreciate the input! Comments are closed.
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+ Unsubscribe anytime AUTHORJoe Meyer, PE, is a Fire Protection Engineer out of St. Louis, Missouri who writes & develops resources for Fire Protection Professionals. See bio here: About FILTERS
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