Hot dip galvanized steel plank technology procedures
General rules: for in the basic construction project implementation with steel and wood, with steel and wood construction development tools, hot dip galvanized steel springboard to promote them, these procedures. This procedure is suitable for shipbuilding enterprises, electric power industry, oil platform and civil construction and installation engineering of all kinds of scaffolding steel springboard.
Second, the technical requirements
(1) material requirements:
Hot dip galvanized steel springboard is made of 1.5 2.0 mm thickness steel plate cold production, the material should comply with the national standard "ordinary carbon structural steel technical conditions" (GB / 700-70).
(2) quality requirements:
A. the appearance of hot dip galvanized steel springboard size length is 2000 mm - 3000 mm - 4000 mm, width is 240 mm, height is 65 mm.
B. hot dip galvanized steel springboard dimension error should not be more than 3.0 mm in length, the width should not be more than 2.0 mm, hole flanging height error should not be more than 0.5 mm. Prevent slippery hole aperture (12 mmx18mm), pitch (30 mmx40mm), flanging height 1.5 mm.
C. the springboard of hot dip galvanized steel flange corner for a 90 °, deviation should not be more than 2 °.
D. springboard board face should level off, hot dip galvanized steel surface deflection is not more than 3.0 mm.
E. the springboard of hot dip galvanized steel plate edge and burr must fall flat.
F. end plate flange and intermittent reinforcement plate used to strengthen spot welding, weld should be kept flat and level.
Test method:
A. raw materials requirements:
Each batch of galvanized steel into the factory shall issue the material report, or inspection report issued by inspection agencies.
B. look and welding requirements:
With visual inspection by quality inspection personnel.
C. the dimensions:
Using steel tape measure.
D. the plate deflection:
Detection platform.
E. load intensity:
In 200 mm high platform laid 500 mm long L50X50 Angle steel, will be hot dip galvanized steel springboard in the above, both sides of the center line on the upper surface of the steel springboard 500 mm uniform 250 kg of pressure, keep 24 hours, to determine a central point of the deformation value, bending deflection is not more than 15 mm, remove after load, to restore the same.
Four, factory inspection:
Hot dip galvanized steel springboard before delivery subject to quality inspection department in accordance with the provisions, 6 after the inspection qualified product quality inspection certificates before leaving the factory.
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