... in slidding ;PVC windows gantry structural steel with 10 tons crane MOQ is 300m2, width X length X ... for you, pls supply us the following parameter together with detail size: 1. Live load on roof(KN ... Earthquake load or Grade if have 5. Crane (if have)Crane span, crane lift height, max lift capacity, max wheel ... world , we are very pleased to enter business with you in the future ! please contact me to ...