Steel Deck Cantilever

reverbz · Jul 2, 2025

Hey Guys,

Is there any reason I can't check the max cantilever of a metal deck by treating it like a beam and running a bending check with its section properties? I know some manufacturer's list the max cantilever but this one doesn't seem to have it.

Thank you!

ALphaSpace · Jul 2, 2025

Have you tried to reach out to their technical department?

XR250 · Jul 2, 2025

You should be able to. Also, look at Vulcraft design tools on their website. Has an unshored cant. tool for composite deck.

Greenalleycat · Jul 2, 2025

The only thing that comes to mind is that this is probably appropriate for a UDL but may not be appropriate for a point load
Wind uplift on a metal deck - sure
Footfall at the end of a cantilever? The local effects of the point load may cause a different failure mode to govern

This insight brought to you by my recent experiences walking on shipping container roofs, which are pretty similar

canwesteng · Jul 4, 2025

Sometimes crippling can govern over flexural yield, not sure why that would be difference for the cantilever case vs the simply supported case.

jhnblgr · Jul 4, 2025

They state in the older manuals that the negative moment steel needs to be designed per ACI for cantilever. https://vulcraft.com/catalogs/Deck/VulcraftDeckCatalog2008.pdf

XR250 · Sunday at 2:28 PM

jhnblgr said:
They state in the older manuals that the negative moment steel needs to be designed per ACI for cantilever. https://vulcraft.com/catalogs/Deck/VulcraftDeckCatalog2008.pdf

The OP has not stated whether this is concrete on metal deck or just bare metal deck

jhnblgr · Sunday at 5:09 PM

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Steel Deck Cantilever

reverbz

Structural

ALphaSpace

Structural

XR250

Structural

Greenalleycat

Structural

canwesteng

Structural

jhnblgr

Civil/Environmental

XR250

Structural

jhnblgr

Civil/Environmental

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