The Department of Public Works and Highways (DPWH) in the Philippines has specific requirements for gabion installations in their projects. These requirements are outlined in their Standard Specification for Public Works and Highways Construction, which is regularly updated to ensure compliance with international standards and best practices.
According to the latest version of the DPWH Standard Specification, the following are the specifications for gabions in DPWH projects in the Philippines:
Material: The gabions should be made of high-quality galvanized steel wire, conforming to ASTM A 975.
Mesh size: The mesh size of the gabion should be 80 mm x 100 mm or 60 mm x 80 mm.
Wire diameter: The wire diameter of the gabion should be 2.7 mm or 3.0 mm for the mesh, and 3.4 mm or 3.9 mm for the selvedge wire.
Tensile strength: The gabion wire should have a minimum tensile strength of 380 N/mm².
Zinc coating: The gabion wire should have a minimum zinc coating of 245 g/m².
Dimensions: The gabion dimensions should be as specified in the project plans, with allowable tolerances for length, width, and height.
Lacing wire: The lacing wire used to join the gabions should be made of the same material and have the same specifications as the gabion wire.
Overall, these specifications ensure that gabions used in DPWH projects in the Philippines are of high quality and meet the necessary standards for strength, durability, and corrosion resistance
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