# Does CC support open web steel joists for flat roofs (bar joists)?

**URL:** <https://blueprint.calcs.com/t/does-cc-support-open-web-steel-joists-for-flat-roofs-bar-joists/558>\
**Category:** Ask for Help\
**Created:** [December 13, 2024, 9:53pm UTC](https://blueprint.calcs.com/t/does-cc-support-open-web-steel-joists-for-flat-roofs-bar-joists/558 "2024-12-13T21:53:46Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![SteveY](https://avatars.discourse-cdn.com/v4/letter/s/85e7bf/32.png) [@SteveY](https://blueprint.calcs.com/u/SteveY)\
**Post date:** [December 13, 2024, 9:53pm UTC](https://blueprint.calcs.com/t/does-cc-support-open-web-steel-joists-for-flat-roofs-bar-joists/558/1 "2024-12-13T21:53:46Z")

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Have an existing building with 24H7 type K open web bar joists. Is that supported for checking design loads especially with snow drift? Thanks.

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**Author:** ![juanp\_clearcalcs](https://yyz1.discourse-cdn.com/flex029/user_avatar/blueprint.calcs.com/juanp_clearcalcs/32/159_2.png) [@juanp\_clearcalcs](https://blueprint.calcs.com/u/juanp_clearcalcs)\
**Post date:** [December 16, 2024, 2:12pm UTC](https://blueprint.calcs.com/t/does-cc-support-open-web-steel-joists-for-flat-roofs-bar-joists/558/2 "2024-12-16T14:12:05Z")

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Hello Steve, welcome to the ClearCalcs community on Blueprint! 😊

ClearCalcs supports open web steel joists for flat roofs through our Steel Joist Calculator, which adheres to U.S. building standards, specifically the Steel Joist Institute’s SJI 100-2020 and SJI Load Tables.

For a practical demonstration, here’s a worked example detailing the design process of open web steel joists on the roof of a single-story commercial building:  
[https://www.clearcalcs.com/support/steeljoistsasd-worked-example](https://www.clearcalcs.com/support/steeljoistsasd-worked-example)

Additionally, you might find this overview video helpful:

[![](https://canada1.discourse-cdn.com/flex029/uploads/blueprint1/original/1X/e23ff430aadf62906f7625462b1d3175aafb2599.jpeg "Open Web Steel Joists - Overview") ](https://www.youtube.com/watch?v=Itjmt97PQ1o)

Feel free to explore these resources, and don’t hesitate to ask if you have any questions! 🚀

Best regards,  
Juan Pablo

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**Author:** ![SteveY](https://avatars.discourse-cdn.com/v4/letter/s/85e7bf/32.png) [@SteveY](https://blueprint.calcs.com/u/SteveY)\
**Post date:** [December 16, 2024, 3:29pm UTC](https://blueprint.calcs.com/t/does-cc-support-open-web-steel-joists-for-flat-roofs-bar-joists/558/3 "2024-12-16T15:29:16Z")

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Juan - Thanks for the reply and the input. After I sent my question I did find the CC webinar and reviewed it - very helpful.

Thanks and have a Merry Christmas and great Holiday Season!  
Steve

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**Author:** ![juanp\_clearcalcs](https://yyz1.discourse-cdn.com/flex029/user_avatar/blueprint.calcs.com/juanp_clearcalcs/32/159_2.png) [@juanp\_clearcalcs](https://blueprint.calcs.com/u/juanp_clearcalcs)\
**Post date:** [December 18, 2024, 4:37pm UTC](https://blueprint.calcs.com/t/does-cc-support-open-web-steel-joists-for-flat-roofs-bar-joists/558/4 "2024-12-18T16:37:20Z")

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Thanks, Steve! I hope you have a wonderful holiday season as well! 🎄