565BRIDGE APPROACH RAIL

New Hampshire Department of Transportation Standard Specifications – 2016 Description

1.1This work shall consist of the furnishing and erecting of bridge approach rail at the required location in conformity with the

design shown on the plans or as ordered.

1.2Designations will follow the classifications listed in 563.1.2.

Materials

2.1Materials shall conform to 563.2.

2.2The material requirements of Section 606 shall apply for W -beam guardrail, thrie -beam guardrail, or tubular thrie -beam

guardrail. Construction Requirements

3.1Fabrication and construction shall comply with the pertinent provisions of 563.3 and 606.3 .

Method of Measurement

4.1Bridge approach rail, of the type specified, will be measured by the unit.

Basis of Payment

5.1Bridge approach rail, of the type specified will be paid for at the Contract unit price complete in place.

Pay items and units

565.12Bridge Approach Rail, ST Unit

565.22Bridge Approach Rail, T2 Unit

565.23Bridge Approach Rail T3 Unit

565.24Bridge Approach Rail, T4 Unit

565.72Bridge Approach Rail F, (2-bar) Unit

565.73Bridge Approach Rail F, (3-bar) Unit

565.81Rehabilitation of Bridge Approach Rail Unit

565.XX2 Bridge Approach Rail “ Type” (Steel Posts) Unit

New Hampshire Department of Transportation Standard Specifications – 2016

Description

This work shall consist of furnishing, fabricating, preparing, assembling, and erecting structural lumber and timber including

the specified paint, preservative, metal parts, and hardware required in conformity with the details shown on the plans or or dered, excluding only those metal parts designated for payment under, or subsidiary to, another item. Materials

Structural lumber and timber shall consist of the species and grade shown on the plans or ordered, graded according to ASTM

D 245. 2.1.1 Round timber for framed bents and bearing piles shall conform to 510.2.1.1.

Timber treatment. Preservative materials, type and method of treatment, and minimum net retention of preservatives shall

conform to the requirements of AASHTO M 133 or as shown on the plans. 2.2.1 Wood to be painted after treatment shall be treated with a water-borne preservative.

2.3Structural shapes, including rods and plates, shall be of structural steel conforming to AASHTO M 183(ASTM A 36).

2.4Castings shall be cast steel or gray iron, as specified.

2.4.1 Steel castings shall conform to AASHTO M 192. Unless otherwise specified, all steel castings shall be Class 485. 2.4.2 Gray iron castings shall conform to AASHTO M 105 (ASTM A 48). Unless otherwise specified, all gray iron castings shall be Class 30.

2.5Hardware.

2.5.1 Bolts and dowels shall be medium steel. Washers shall be ogee, gray or malleable iron castings, or shall be cut from medium steel. 2.5.2 Machine bolts shall have square heads and nuts unless otherwise specified. Nails shall be cut or round wire of standard form. Spikes shall be cut spikes, wire spikes, or boat spikes, as specified. 2.5.3 Unless otherwise specified, except for malleable iron connectors, all hardware, including nails, spikes, bolts, dowels, washers, and lag screws shall be galvanized in conformance with AASH TO M 232 (ASTM A 153) or cadmium plated in conformance with AASHTO M 299 (ASTM B 696).

2.6Paint when required shall be as specified and shall conform to Section 708.

Construction Requirements

Treatment and Inspection.

3.1.1 Framing and boring of treated timbers shall be done before the treatment is applied, except for such timbers subject to variations due to field conditions, as indicated on the plans or directed. 3.1.2 The Contractor shall give ample notice to the Engineer of the beginning of the treatment at the plant so that inspection may be provided. The Contractor shall furnish all facilities for the inspection of material and its treatment. Inspection at the plant is intended as a means of facilitating the work and avoiding error, and it shall be understood that it will not relieve the Contractor of any responsibility in regard to any imperfect material or workmanship and the necessity for replacing the same. The acceptance of any material by the Engineer shall not be a bar to its subsequent rejection if found defective. Rejected materials shall be replaced promptly by the Contractor. 3.1.3 All work of erection shall be subject to the approval of the Engineer, who shall be given all facilities required for a thorough inspection of workmanship. Material and workmanship not previously inspected will be inspected after it is delivered at the site of the work.

3.2Handling and Storage.

3.2.1 Loading, transporting, unloading, and piling of timber or lumber shall be conducted so that it is kept clean and free from injury.