616Snow Fence

Snow Fence

616.1DESCRIPTION

1 This section describes the requirements for constructing and resetting snow fence.

616.2MATERIALS

1 Provide materials in accordance with the following: Material Subsection Bolts and Fasteners 815.6 Reinforcing Steel 811.1 Structural Timber and Lumber 817.1 2 Provide Lodgepole Pine, Ponderosa Pine, Engelmann Spruce, Douglas Fir, Hem - Fir, or Western Larch rough-dimension lumber. For 1-inch [25 mm] lumber, provide Western Wood Products Association (WWPA) No. 3 or better, treated or untreated. For 2-inch [50 mm] lumber, provide WWPA No. 2 or better, and when used for line posts and sill -and- frame assemblies, provide lumber treated in accordance with American Wood Protection Association (AWPA) Standard U1 to the requirements of Use Category 4A (UC4A) and certificates and reports thereof are submitted, in accordance with Section 817, Structural Timber and Lumber. Use treated timber that is dried to a moisture content of 19 percent after treatment. 3 Provide anchor angles of structural carbon steel in accordance with ASTM A 36 [ASTM A 36M] requirements. Provide bolts with washers and nylon-insert locknuts. Use plated nails in accordance with ASTM B 633, SC3 or ASTM A 641 [ASTM A 641M], class I coating. Use grade 60 [400] reinforcing steel in the anchorage system. 4 Provide galvanized bolts and fasteners.

616.3EQUIPMENT—V acant

616.4CONSTRUCTION

616.

4.1New Snow Fence

1 The department specifies the minimum number of washers. As required, provide additional washers, and adjust bolt lengths to provide a minimum of 1 thread and a maximum of ½ in [13 mm] of thread exposed beyond the outside end of the nut when components are assembled clamp-tight. Do not crush wood fibers by over-tightening.

Snow Fence SECTION 616 2 Place reinforcing steel anchors as specified and drive to prevent panels from sliding or overturning. Remove and replace anchors that are not tight against the anchor angle. 3 Where rock hinders the driving of anchor bars, anchor in the rock. Drill a 1-inch [25 mm] diameter hole at least 6 in [150 mm] deep into solid rock and remove dust and loose material. Install bars in holes using epoxy resin grout, as approved by the engineer and in accordance with the manufacturer’s recommendations. 4 Fasten the rock anchor bars to the frame as specified; they may be perpendicular to the sill. Ensure that rock-anchored bars extend above ground to the same height as driven anchor bars. If driving anchors is not possible, install four rock anchors per panel with two rock anchors for each outer sill. Replace and compact soil removed for rock drilling. 5 Place line posts in holes excavated to specified dimensions. Backfill holes to finished ground in approximately 6- inch [150 mm] compacted layers. The engineer may approve the driving of posts. 6 Place panels to equally distribute weight [mass] to the uprights and with a continuous bearing surface under each sill. Grade to obtain proper bearing. Overlap panels to eliminate spaces. 616.

4.2Removing and Resetting Snow Fence

1 As specified, remove snow fence, including hardware, posts, and panels, and reset. Before resetting, inspect each panel for damage and repair as directed by the engineer. Repair damage incurred during resetting at no additional cost to the department. Panels removed but not reset become the property of the contractor. 616.5 M EASUREMENT and PAYMENT 616.

5.1General

1 The engineer will measure:

panel constructed or reset.

ow Fence Repair for panels damaged prior to removal in accordance with Subsection 109.4, Extra and Force Account Work.

Snow Fence SECTION 616 2 The department will pay as follows: Pay Item Pay Unit Measure to the Nearest Pay to the Nearest Reset Snow Fence EA [Ea] EA [Ea] EA [Ea] Snow Fence Repair $$ 0.01 $$ 0.01 $$ Snow Fence (Wood) ft [ m] EA [Ea] EA [Ea] EA [Ea] 616.

5.2Referenced Sections for Direct Payment

1 When specified, the engineer will measure and pay for Removal of Snow Fence Panels in accordance with Section 202, Removal; however , when reset is specified, removal will be incidental to resetting.