Fire Station Pavement
Fire Station Pavement
(OP)
Does anyone have any tips for designing concrete pavement for a fire station driveway? I've been told to design for an 80 kip truck with 70% of the load on the rear axle. The City wants a structural slab with two mats of rebar. I'm having problems finding information on designing that type of slab.





RE: Fire Station Pavement
RE: Fire Station Pavement
KRS Services
www.krs-services.com
RE: Fire Station Pavement
I understood that 70% of the total truck load is transferred to the rear axle, not that you would design for less that the rated axle load.
Try http://www.pcase.com for Government freeware for rigid pavement design.
HTH,
Carl
RE: Fire Station Pavement
Best of luck.
RE: Fire Station Pavement
Just a little tidbit on loading parameters.
KRS Services
www.krs-services.com
RE: Fire Station Pavement
Regardless of the design procedure adopted pay careful attention to pavement structure drainage and differential support conditions (as noted by dirtsqueezer above). I find the root of most pavement distress problems for flexible and rigid pavements alike stem from either(or a combination) of these factors.
Dont skimp on granular material (it is reducing the applied stress in the subgrade)and filter fabric if necessary . Regardless of what a computer program or design algorythm indicates I like to see a total structural pavement thickness of not less than 24 inches for heavy trucks.
RE: Fire Station Pavement
RE: Fire Station Pavement
RE: Fire Station Pavement
RE: Fire Station Pavement
Uniformity prior to construction is all well and good, but what assurance is there that it will stay that way? And you claim that, "No slab will last without a good and even support." I know of one heavily travelled artery in Houston - Westheimer Road - that was rebuilt in about 1984. As of six weeks ago, it remains in great shape. The soaked CBR values for the expansive clays beneath the road are quite low, with some as low as 1 or 2. But the double matted steel has provided good reinforcement for the 10 inch thick pavement.
A heavily reinforced slab can reduce some of the problems associated with a poor subgrade.