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RE: retaining all vehicle surcharge

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For the wheel and axle load 250 psf is generally used to get you to an AASHTO HS 20-44 equivalent loading. However, if the fire apparatus is deployed, the outriggers on an aerial platform can be a killer. Manufacturers are not very forthcoming, but the outrigger loads can get up to 60,000 pounds which will dwarf the maximum AASHTO wheel loads.

Harold Sprague

From: "Mark D. Baker" <shake4bake(--nospam--at)>
Reply-To: <seaint(--nospam--at)>
To: <seaint(--nospam--at)>
Subject: retaining all vehicle surcharge
Date: Wed, 4 Aug 2004 13:52:16 -0700

What is a good surcharge value to use for a residential retaining wall that
would have vehicle traffic on the retained side of wall, potentially a
fire truck loading? I don't want to do a wheel loading, just a psf surcharge



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