b'STORMWATERCATALOG HATCHWAY SPRING MECHANISMSANGLE FRAME TROUGH FRAMEHORIZONTAL SPRINGSTHE HORIZONTAL ARRANGEMENT IS THE STANDARD DESIGN FOR PEDESTRIAN HATCHES AND HEAVY DUTY SINGLE DOORHATCHES. THEY ELIMINATE THE CASTING PROBLEMS CAUSED BY THE SPRING ASSEMBLY BELOW THE SLAB.12 12ANGLE FRAME TROUGH FRAMEVERTICAL SPRINGSTHE VERTICAL ARRANGEMENT IS THE STANDARD DESIGN FOR HEAVY DUTY DOUBLEDOOR HATCHES. THEY ARE ALSO AVAILABLE ON ANY OF OUR OTHER HATCH DESIGNS.TORSION BARSTORSION BAR SPRINGS CAN BE USED ONBOTH TROUGH AND ANGLE FRAME ACCESSDOORS. CONSULT OUR REPRESENTATIVES FORUSE ON HEAVY STEEL OR OTHER DOORSWITH HEAVY COVERS.ENCLOSED COMPRESSION SPRINGSWE CAN SUPPLY STAINLESS STEEL ENCLOSURES HATCHWAY SPRING MECHANISMSON HORIZONTAL AND VERTICAL SPRINGS IF YOUWISH TO ENCLOSE THE SPRINGS.HSM-1 HSM-119-19230 INFO@PARKUSA.COM|888-611-7275|WWW.PARKUSA.COM'