A004_FSSS_Section255.pdf

AG0120S150021, Amendment 004, FSSS Replacement Pages

255 – Mechanically Stabilized Earth Walls 255.00_1005_08_26_2015

Description

255.01 Replace this section with the following:

This work consists of constructing welded wire faced, mechanically stabilized earth (MSE) walls.

Materials 255.02 Add the following:

Permeable backfill Table 703-1

Construction Requirements

255.04 Wall Erection.

Add the following:

The walls shall be welded wire faced and supplied by an experienced fabricator.

The following mechanically stabilized earth wall suppliers have a history of supplying this type wall:

Hilfiker Retaining Walls Tensar International Corp.

3900 Broadway 5883 Glenridge Drive Eureka, CA 95502-2012 Suite 200 800-762-8962 Atlanta, GA 30328-5363 888-828-5126 T&B Structural Systems 6800 Manhattan Blvd.

Suite 304 Fort Worth, TX 76120

Other manufacturers of welded wire faced MSE walls, having a minimum of five years' continuous experience in the design and construction of MSE walls may be accepted.

Delete Sections (a) and (c).

255.05 Backfilling.

Add the following:

Backfill the bottom 4 feet of the mechanically stabilized earth walls with Permeable Backfill as specified in Section 703.04, Table 703-1.

AG0120S150021, Amendment 004, FSSS Replacement Pages

255.06 Acceptance.

Add the following to the fifth paragraph:

Sampling and testing requirements are shown in Table 255-1.

Materials

255.07 Replace the second and third paragraphs with the following:

All excavation, dewatering and select granular backfill is included in the 25501 pay item.

Permeable backfill is paid separately under pay item 25507.

Measure mechanically-stabilized earth walls by the square yard of front wall face.

Measure permeable backfill within the stabilized volume by the cubic yard in place.