There are seven types of substructures,which are K-substructure,S-sling shot construction, etc. Substructure are designed and manufactured in accordance with API spec 4F and other related technical standards. SubstructureDZ60/3-TDZ90/4.5-KDZ170/4.5-KRotary beam load, kN6009001700Setback load, kN300500900Height of drill floor, m34.54.5Clear height under RT beam, m2.23.43.2SubstructureDZ225/7.5- ...