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View Full Version : Turning radius for an 18 wheeler


Woodland
03-07-2010, 10:15 AM
Not really a landscaping question, but, I'm working on some designs for a new staging yard and I need to map out a driveway that will allow access for delivery trucks. Most of my materials arrive smaller trucks or dump trucks. I get regular shipments of mulch via roll-off containers in 30 yard loads, however, I have the option of getting 55 yard deliveries via a "semi" live load trailer. I want to make sure my driveway, parking area is large enough and designed properly to accomodate these trucks. What are some guidelines that I should follow??

Bigred350
03-07-2010, 09:32 PM
I dont know the answer to your question but after you figure out your design make it twice as big. You never can have enough room for turning around and parking.

PaperCutter
03-08-2010, 07:15 AM
I used this when I was designing a client's farm layout: http://onlinemanuals.txdot.gov/txdotmanuals/rdw/minimum_designs_truck_bus_turns.htm

If you're a CAD guy, I came across this: http://www.hawsedc.com/gnu/turn.php I haven't tried it yet, but it looks really cool and I'm stoked to try it.

AGLA
03-08-2010, 07:22 AM
Kevin,

The outside turning radius is not any worse than a long straight truck. You have to be more concerned with the tracking of the trailer. You should be fine with an outside radius of 45'.

Woodland
03-09-2010, 06:29 AM
I used this when I was designing a client's farm layout: http://onlinemanuals.txdot.gov/txdotmanuals/rdw/minimum_designs_truck_bus_turns.htm

If you're a CAD guy, I came across this: http://www.hawsedc.com/gnu/turn.php I haven't tried it yet, but it looks really cool and I'm stoked to try it.

Thanks, this is basically what I was looking for.

sonnyferguson
03-23-2010, 10:52 PM
Just wanted to throw this at you also. I don't know if this will be an issue for you or not but, you may want to keep in mind that the more room you leave for a Tractor Trailer. The less he will have to spin his trailer. What I'm saying is that if you don't leave enough room for the trailer to stay moving with the tractor. {Keeping it from being jack knifed} almost V shaped. Then the trailer tires tend to turn into rubber grinders, that I've seen tear up some really nice lots. They can be put into some very tight spots and God knows I've back some 53' trailers into some places that would blow your mind. But, if the area is so tight that truck basically has to spin the trailer on its tires stationary. Then over time it will definitely mess up a road, drive, or loading area.