Wood Fence Sight Screen Art. 641.02
640.06 Basis of Payment. This work will be paid for at the contract unit price
per foot (meter) for SIGHT SCREEN (CHAIN LINK FENCE) of the height specified. SECTION 641. WOOD FENCE SIGHT SCREEN
641.01 Description. This work shall consist of furnishing and installing wood
fence sight screen.
641.02 Materials. Bolts and washers shall be according to Article 1006.17.
Nails shall be galvanized common wire nails. All lumber shall be sound and free from excessive splitting or deterioration. Dimensions shown on the plans are for surfaced (S4S) lumber. Rough sawn lumber of the nominal size shown may be used for any members provided it can be successfully stress graded and pieces of the same nominal size are sawn to a uniform width and thickness. The required grade of lumber is visually stress graded according to the rules of the following agencies:
a.Douglas Fir & Western Red Cedar - West Coast Lumber Inspection Bureau
b.Southern Pine-Southern Pine Inspection Bureau
c.Red (Swamp) Cypress-National Hardwood Lumber Association The grades shown below in the table are the minimum acceptable and all species shown are alternates for the indicated usage. All wood, except Red (Swamp) Cypress and Western Red Cedar, used for posts, rails, or planks, shall be treated according to Article 1007.12. Fence Height Usage in. (mm) Lumber Species Commercial Grade 6 ft (1.8 m) or 8 ft (2.4 m) Rails 3 x 4 (75 x 100) Douglas Fir Southern Pine No. 2 No. 2 Posts 6 x 8 (150 x 200) or 8 x 8 (200 x 200) Douglas Fir Southern Pine No. 2 No. 2 Planks Red (Swamp) Cypress Southern Pine Western Red Cedar No. 2 No. 2 No. 1 Fencing Art. 641.03 Shoulder Rumble Strips CONSTRUCTION REQUIREMENTS
641.03 General. The sight screen shall be as shown on the plans and
according to AASHTO LRFD Specifications for Structural Supports for Highway Signs, Luminaires, and Traffic Signals, and AASHTO Standard Specifications for Highway Bridges. Wooden fence construction shall be according to the applicable portions of Section 507. All fencing for any one installation shall be of the Wood Plank, Type P, or the Cedar Stockade, Type S. The two types shall not be mixed together. Cedar pickets shall be either split or round, be completely stripped of bark, and be straight and free of excessive taper or bowing, and when installed, shall butt tightly against one another. There shall be no gaps greater than 1/4 in. (6 mm) in width between adjacent pickets. Fence panels, consisting of horizontal rails and wood planks or cedar pickets, may be prefabricated or built in place. Additional nails, not shown on the plans, may be used to temporarily tack members in place during erection. Nailing shall be done in such a manner as to avoid splitting the lumber. Lumber which, in the opinion of the Engineer, is split excessively, will be rejected.
641.04 Backfill. The backfill for posts shall be CA 6, CA 10, or CA 12
aggregate according to Article 1004.01. Backfill shall be thoroughly compacted, meeting the approval of the Engineer.
641.05 Method of Measurement. Wooden fence will be measured for
payment in feet (meter), along the top of the fence from center to center of end posts.
641.06 Basis of Payment. This work will be paid for at the contract unit price
per foot (meters) for SIGHT SCREEN (WOODEN FENCE), of the type and height specified. SECTION 642. SHOULDER RUMBLE STRIPS
642.01 Description. This work shall consist of constructing rumble strips in
shoulders.
642.02 Equipment. The equipment shall be a self-propelled milling machine
with a rotary-type cutting head(s). The cutting head(s) shall be suspended from the machine such that it can align itself with the slope of the shoulder and any irregularities in the shoulder surface. The teeth of the cutting head(s) shall be arranged to provide a smooth cut, with no more than a 1/8 in. (3 mm) difference between peaks and valleys. Prior to commencement of the work, the Contractor shall demonstrate the ability of the equipment to achieve the desired results without damaging the shoulder.
Referenced in this section
Sections that cite this one
Get an email when 641 changes
Illinois revises spec sections through supplementals and new editions. We check this one every week and email you the day it changes. Free, no account.
Source: Illinois Standard Specifications for Road and Bridge Construction, 2022 Edition. Pages 586–587 of 1,217. View official source ↗