The building is 20' x 30', based on 10' bays. At the gable peak it's 14'. (ceiling height in the loft is about 5' at the peak) The rafters are 4x6 on 33" centers and the roofing is standard 26 gauge "Imperial Rib" galvalume (ABC) fastened to 2x4 roof purlins spaced at 22". All the wood (frame and siding) is hemlock.
The building is set on rebar reinforced concrete piers (5' deep, including footing). I set j-bolts into the tops of the piers at the 10' centers, extending to a height of about 4" above the pier. Steel straps (with a short piece of rebar at the base in a T configuration) were also set into the tops of the pier (one per pier), offset from center to extend up the side of the timber post. The j-bolt (set into holes drilled into the post base) resists horizontal movement and the straps hold it vertically. The floor is a sand/gravel base covered with roadway fabric then 6" of "sure pack" (crushed stone with fines).
Best,
~ Kevin
