This is an 18' wide x 30' long x 12' legs. We left the front open, so you will get 14 1/2' clearance in the center. We added an extended gable on the back side and a 3' panel on each side. We also included the J-Trim and L-Trim. Standard concrete anchors are supplied with our Free Delivery and Installation. This design is Engineer Certified for 140 M.P.H. winds and 35 P.S.F on the roof. *Prices are subject to change**