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Articulated concrete blocks for access ramps


Location
Washington
Publication Date
02/11/2020 09:06 AM EST
Closing Date
02/20/2020 06:00 PM EST
Issuing Organization
State of Washington - Department of Fish and Wildlife
Solicitation Number
Description

Specifications include, but are not limited to: Cellular concrete mats will be assembled by the owner upon delivery. Individual units in the system shall be capable of being staggered and interlocked for enhanced stability. The mats shall be constructed of open cell units and half solid blocks. The open cell units shall have two (2) vertical openings of rectangular cross section with sufficient wall thickness to resist breakage during shipping and installation. Parallel strands of cable shall be capable of being extended through two (2) cable ducts in each block allowing for longitudinal binding of the units within a mat. Each row of units shall be laterally offset by one-half of a block width from the adjacent row so that any given block is cabled to four other blocks (two in the row above and two in the row below). Each block shall incorporate interlocking surfaces that minimize lateral displacement of the blocks within the mats when they are lifted by the longitudinal revetment cables. The interlocking surfaces must not protrude beyond the perimeter of the blocks to such an extent that they reduce the flexibility or articulation capability of the cellular mats. The concrete units shall be produced by a dry cast method. The dry cast units obtain strength in a shorter duration as well as an increase in the durability and overall quality of product.

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