INSTALLING LSZH IN TUNNEL APPLICATIONS
Use the proper pulling hardware and do not exceed the maximum tensile pull rating of the ducts. Use swivels – attached to each duct and, the lead pull line – and wire rope slings (bridle) for maximum pulling clearance in the conduit and reduce twisting of the ducts. When placing different size ducts simultaneously, the pull tension maximum is limited to the duct with lowest published pull tension maximum. Note that when air jetting in cables, LSZH duct products may have lower than normal jetting pressure maximums due to the nature of the LSZH material.