China 4FT 2′′ Galvanized Traffice Metal Sign Post, Find details about China Sign Post, Traffic Safety Post from 4FT 2′′ Galvanized Traffice Metal Sign Post
MATERIAL
Tubing with plain finish is rolled from 12 gauge (0,105 U.S.S. Gauge) and 14 gauge (0,075 U.S.S. Gauge) hot rolled steel, Q235b. Galvanized finish, average minimum yield strength after cold forming is 60 000 psi.
GALVANIZATION
Galvanization shall conform to specification ASTM A653 G90 (275g/m²). Corner weld is zinc coated after scarfing operation.
TOLERANCES
Wall thickness tolerance:
Permissible variation in wall thickness is + 0,011, -0,005 inches.
Tolerance on size: Nominal outside dimension (inches) | Outside tolerance for all sides at corners (inches) |
1¾" x 1¾" | ± 0,008 |
2" x 2" | ± 0,008 |
2¼" x 2¼" | ± 0,010 |
2½" x 2½" | ± 0,01 |
Squareness of sides and twists: Nominal outside dimension (inches) | Squareness tolerance (inch*) | Twist permissible in 3 feet (inch**) |
1¾" x 1¾" | ± 0,010 | 0.062 |
2" x 2" | ± 0,012 | 0.062 |
2¼" x 2¼" | ± 0,014 | 0.062 |
2½" x 2½" | ± 0,015 | 0.075 |