708— Timber Structure Hardware

700-97 Section 708 — Timber Structure Hardware

708.1 Description 1 Furnish fastening hardware for timber structures including bolts, lag screws, nuts, nails, washers, rods, eye bars, turnbuckles, shapes, and plates. 708.2 Materials 708.2.1 General 1 Furnish fastening hardware as specified or as directed by the BCE. 2 Furnish bolts, drift pins, dowels, lag screws, nails, and machine bolts of low carbon steel conforming to Subsection 709.2.5. Provide hardware of standard quality and of the sizes and quantities specified. 708.2.2 Rolled Steel 1 Furnish rods, plates, shapes , and eye bars of structural carbon steel or malleable iron as specified conforming to Subsection 709.2.1. 708.2.3 Castings 1 Provide castings of cast steel or gray -iron as specified conforming to Subsection 709.2.6 . 708.2.4 Nuts and Bolts 1 Use the plan length of bolts given for estimating purposes only. Furnish bolts of the proper length for each connection. Furnish square or hexagonal bolt heads and nuts where the washers bear on wood and hexagonal bolt heads and nuts where the washers be ar on metal. 708.2.5 Washers 1 Provide washers on each end of all bolts, except with high strength bolts where only one washer is required. 2 Provide standard cut washers for ½ -in. bolts or smaller that are bearing on wood or metal. 3 For bolts larger than ½ -in. diameter, furnish cast ogee or approved malleable castings where washers bear on wood. Furnish cast ogee washers with a diameter of four times the bolt and a thickness at least equal to the diameter of the bolt. Furnish malleable washers with a diameter of four times the bolt and a thickness of at least half of the diameter of the bolt.