Steel Grate for Detention Vault Lid
Steel Grate for Detention Vault Lid
(OP)
Got a situation where the local fire marshall has specified that the access grate for a concrete detention vault needs to support the weight of a ladder truck outrigger pad.
The pad generates a load of 45,000 pounds over a 5.5 square foot area, or about 8 ksf.![[shocked] shocked](https://www.tipmaster.com/images/shocked.gif)
Aside from the steel support frame top be designed, does anyone know of any steel grating that is currently manufactured to handle this loading? It is an exterior application in a traveled way.
The pad generates a load of 45,000 pounds over a 5.5 square foot area, or about 8 ksf.
![[shocked] shocked](https://www.tipmaster.com/images/shocked.gif)
Aside from the steel support frame top be designed, does anyone know of any steel grating that is currently manufactured to handle this loading? It is an exterior application in a traveled way.
Mike McCann
MMC Engineering
Motto: KISS
Motivation: Don't ask






RE: Steel Grate for Detention Vault Lid
Don't you mean grating on a gridwork of beams at 3 or 4' o/c, which can support 45k? By the way who are they going to detain down there, so valuable that they need a vault?
RE: Steel Grate for Detention Vault Lid
The grating still has to span between the steel beams, so it will see the load, just like a concrete slab would.
Isn't structural engineering interesting?
Mike McCann
MMC Engineering
Motto: KISS
Motivation: Don't ask
RE: Steel Grate for Detention Vault Lid
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RE: Steel Grate for Detention Vault Lid
How about some removable I-beams that could be bolted in and removed when necessary. Cover them with grating that will now span the lesser distance.
RE: Steel Grate for Detention Vault Lid
Mike McCann
MMC Engineering
Motto: KISS
Motivation: Don't ask