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RE: Uniform loadings on building code.

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Generally the equipment loads are considered dead loads, and the live load in an elevator equipment room is to serve as a load to cover "lay down" loads and maintenance personnel loads.

You can make the decision as a professional to ignore Building Code loads, but that could put you in violation of the law in some states, and at odds with accepted professional practice. That brings out the lawyers like a dead whale brings out sharks, or trailers attracting tornados.

Harold Sprague

From: hadiprawira djohan <hadiprawira(--nospam--at)>
Reply-To: <seaint(--nospam--at)>
To: seaint(--nospam--at)
Subject: Uniform loadings on building code.
Date: Fri, 19 Aug 2005 14:48:40 -0700 (PDT)

Fellow Engineers,

I am designing a floor system for a mechanical room and I was provided with all the size, location, and weight of the mechanical equipements.

Based on the local code, 75 PSF Live load is required for mechanical room.

Does it mean that i need to use 75 PSF LL + my equipment loadings, or am I allowed to reduce the required 75 PSF LL (i.e. to 40 PSF) considering i have designed my floor exactly the way it will be utilized.

The way I understand is that 75 PSF LL is just a design perimeter if the mech. loadings are unknown. The structure will never be fully loaded by 75 PSF or its equivalent concentrated loading during the lifetime.

Please correct me if i am wrong!

Does anyone know when an engineer is allowed to overwrite the Building code loadings requirements if the loadings stated in the building code has became not practical?

thank you in advance.


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