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- To: <seaint(--nospam--at)seaint.org>
- Subject: pit ramp
- From: "Roger Davis" <sds(--nospam--at)sdsarch.com>
- Date: Fri, 4 Dec 1998 07:35:51 -0600
From: Roger Turk Jeff, >From an old Architectural Graphics Standards: Max. slope: 1:8; Min. length: 30'; Recommended length: 40'. (Footnote cites info from, "The Operations Council, American Trucking Associations, Inc.") Remember, the dock height is going to be dependent on the slope and any level or reverse slope that exists in the pit. The specified dock height, usually 4'-0" to 4'-6" would be measured from where the extended line of the sloping ramp intersects the vertical face of the dock and would *not* be the height of the dock at the face of the wall. Also, the sloping ramp will cause the top of the truck to hit the wall well before the truck bed will hit a dock bumper unless the deck projects out a considerable distance. Truck height is approx. 14'. Hope this helps. A. Roger Turk, P.E.(Structural) Tucson, Arizona Jeff Fertich wrote: . > Any suggestions or rational for the slope of a pit ramp for a tractor . > trailor loaded to a total weight of 100K of compacted paper must travel up . > from a dead stop? I suggest you get a copy of RITE-HITE's Dock Design Guide to address Roger Turk's concern.(414)355-2600. They also mention that as a general rule grades should not exceed 10%. They indicate this is too steep if conditions creating poor traction exist. Motor Truck Engineering Handbook states that to negotiate grades in excess of 5 per cent, all-wheel drive traction, a powered dolly or the use of tractive aids are recommended. The book also indicates that a 40' semi with 50' overall length with 6x2 tractor drive and gross weight of 112,500 lbs. Can negotiate a 11.2% grade with chained tires. The book also indicates that a loaded truck can ascend a steeper ramp than an empty truck. Roger Davis SDS Architects, Inc.
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