Quick Reference Values
Minimum thickness of mild steel sheet for pickets1.25 mm
Nominal thickness of vertical channel section for gate frame2.0 mm
Maximum centre-to-centre spacing of pickets (fully extended)120 mm
Minimum diameter of cast iron bottom rollers40 mm
Minimum width of top and bottom channel sections40 mm
Minimum overlap of leaves in closed position for double leaf gates40 mm
Practical Notes
Verify gate operates smoothly without jamming; check that all rollers are in contact with the guide rails and rotate freely.
Inspect the paint or galvanized finish for uniform coverage, paying close attention to welds and joints to prevent premature rusting.
Ensure the locking arrangement is robust, aligns correctly, and the gate can be secured firmly.