36" " 2 1 3 2 " "B " 2" "F " 32" 2" 3"" 9 1 4 3 4 "D " 3 " 7" Weight (plf) Area (in.) "B" (in.) "D" Type Girder Tx28 585 Tx34 627 Tx40 669 Tx46 761 Tx54 817 Tx62 910 Tx70 966 1,04

Beam span tables.xlsI Girders, Recommended Span Lengths for LRFD

DESIGN NOTES: Designed according to AASHTO LRFD Bridge Design Specifications. Load rated using Load and Resistance Factor Rating according to AASHTO Manual for Bridge Evaluation. Optional designs for girders 120 feet or longer must have a calculated residual camber equal to or greater than that of the designed girder.

Statewide Standard Drawing - Drawings are not considered to be an available standard until they are issued via the TxDOT internet site. The original version is kept on file in the Bridge Design Section of the Bridge Division. The electronic file of this original is available here on TxDOT’s Internet web site. Any reproducible copies made from the.

2007年11月30日 · For bridges with Type Tx28, Tx34, Tx40, Tx46, Tx54, Tx62 and/or Tx70 prestressed concrete girders, the contractor can submit an alternate design for approval using other TxDOT prestressed concrete girder shapes .

Statewide Standard files: TxDOT Divisions maintain Statewide electronic master files. The responsible Division is identified in the plan title block, and good quality printed versions of the file may be used statewide in plan sets without being signed and sealed by a licensed engineer.

Steel Beam standards are available for structures with Type W18, W21, W24, W27, W30, W33, W36 or W40 beams. These are included in our issued set of Steel Beam standards. See MISCELLANEOUS STANDARDS section in the list for all additional standard drawings required.

Prestressed concrete I-girders were developed with input from the precast industry to exceed the performance characteristics of prestressed concrete I-beams—span length, girder spacing, stability, and durability—and to provide more beam depth options for design optimization.

Span lengths for prestressed concrete I-Girder type: Type Tx28 for spans lengths 40.000' thru 65.000'. Type Tx34 for spans lengths 40.000' thru 80.000'. Type Tx40 for spans lengths 40.000' thru 90.000'. Type Tx46 for spans lengths 40.000' thru 100.000'. Type Tx54 for spans lengths 40.000' thru 120.000'.

A 5-inch minimum depth concrete slab for the beams is required to provide adequate rail anchorage and expansion joint hardware. Foam backer rods may be placed between beams to act as a form for the slab. Backer rod diameter should be 125% of the joint opening.