Attic Trusses Trusses 2′ OC (Trusses Can Also be Set 4′ OC for Steeper Roof Pitch Appeal But Eliminating Attic Storage and flooring) BUILDING 1 and BUILDING 2, BUILDING 3 For Similar Attic Area Pics Attic trusses are great for living space or storage space AtticIf you ever wondered how to figure your overall building height or roof height, here we have a calculator to make life a little easier for you As a reminder, please, don't forget to add height of rafter, thickness of roofing material and ridge vent to the number that you'll get using our calculator312, 612 and 1212 roof pitch options 12 inch overhang 31 sizes from 8×4 to 16×32 8, 10, 12, 14 & 16 ft widths Single and double doors Floor studs 12 inch OC Wall studs 16 inch OC Roof trusses 16 inch OC Double top plates Includes 48 inch loft the length of Roof Slope Table Table Of Roof Rise Run Slope Types Walkability 16/12 roof pitch factor