helical screw piles and helical pierdescription Screw type (1) For 14" (36cm) diameter foundation anchors, reduce allowable capacity by 20% per ....
Screw Pile Foundation Under Existing Cabindescription Screw Pile Foundation Under Existing Cabin (1) For 14" (36cm) diameter foundation anchors, ...
Auger drill bit ground drill bitdescription Screw type [different plastic property, can choose different structure of the screw, more can improve the ...
Ground hole drill earth auger description Screw type [different plastic property, can choose different structure of the screw, more can improve the .....