Product name
House Platform Extension Retaining Structure Used Square Screw Helical
Helices material
ASTM A36 hot rolled plate
Shaft material
40Cr(ASTM A5140) or 45#(ASTM 1045) steel
Corrosion protection
ASTM A153 hot dipped zinc coating
Extension length
3ft/5ft/7ft/10ft
Helical lead length
3ft/5ft/7ft/10ft or Customized
Helix thick
3/8'' and 1/2''
Helix size
8/10/12/14 inch
Advantage
High quality, easy install, rustproof surface treatment
Usage
House platform extension retaining foundation