Contractor shall: - Remove and dispose of the short length of existing wooden barrier posts in the work area. - Excavate the work area to allow for proposed wall installation to the included specifications. - Remove existing free standing metal poles in the work area. o Poles can be cut if remainder is a minimum of 1.5 inches below finished ground level. o If an existing pole can be used to benefit the wall project, Contractor can obtain written permission from MRCA to integrate said pole(s) into the project. - Construct a continuous wooden soil barrier supported by galvanized steel posts on the front (west-facing new wall surface) with the outer edge of each post being no less than one foot (minimum setback) from the edge (east) of the City of Los Angeles sidewalk. Project Specifications: - Wall to be the height of three (3) 2-in. by 12-in. boards stacked flush edge to edge. - Lumber shall be 2-in. by 12-in. #2 grade ground contact brown colored, pressuretreated, and free of significant cracking and splintering. Lumber lengths can be any combination of boards at 12-ft., 16-ft., and/or 20-ft. lengths. - No end of any 2-in. by 12-in. board in the project shall extend more than 10 inches beyond one of the installed posts. - Steel posts shall be a minimum 2-in. diameter tubular steel Schedule 40 seamless galvanized ASTM. - Posts shall be set no more than seven (7) feet apart on-center. - Minimum post hole depth shall be three (3) feet. - Posts to be set in concrete poured to a height flush with the surrounding ground (approximately one (1) inch below the elevation of the sidewalk). - Top of posts shall be between 2-in. and 3-in. from the top edge of the top layer stacked boards.
