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The typical sizes of double tees are up to 15 feet (4.6 m) for flange width, up to 5 feet (1.5 m) for web depth, and up to 80 feet (24 m) or more for span length. Double tees are pre-manufactured from prestressed concrete which allows construction time to be shortened.
Unlike an I-beam, a T-beam lacks a bottom flange, which carries savings in terms of materials, but at the loss of resistance to tensile forces. [5] T- beam designs come in many sizes, lengths and widths to suit where they are to be used (eg highway bridge, underground parking garage) and how they have to resist the tension, compression and shear stresses associated with beam bending in their ...
The UK equivalent is the concrete step barrier. [citation needed] First tested in 1968 by the then Department of Highways in Ontario, Canada, the Ontario Tall Wall is a variant of the Jersey barrier. [10] Standing at 42 inches (107 cm), it is 10 inches (25 cm) taller than the standard Jersey barrier.
A tandem axle is defined as two or more consecutive axles whose centers are spaced more than 40 inches (102 cm) but not more than 96 inches (244 cm) apart. [10] Axles spaced less than 40 inches (102 cm) apart are considered a single axle. [11] In effect, the formula reduces the legal weight limit for shorter trucks with fewer axles (see table below
In the Cambridgeshire Guided Busway the rail is a 350 mm (14 in) thick concrete beam with a 180 mm (7.1 in) lip to form the flange. The buses run on normal road wheels with side-mounted guidewheels to run against the flanges.
A ladder frame with beam axles is used. Front axles are on semi-elliptical leaf springs and tandem steer axles are available. The base rear suspension is a Mack tandem but other axle/suspension available. Wheelbases are from 159 to 220 inches (400 to 560 cm). The TerraPro has more frame options than other Mack trucks.
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The Mack Granite is a series of heavy duty and severe service trucks built by Mack Trucks.It has a long, low-profile hood and a high-visibility cab. Designed as straight trucks for local construction, waste removal, and other vocational jobs, it is also available as a semi-tractor.