Homestead · after the bunkers
The workshop
Raised after the hub and the bunkers, and the place the house is built from: three garage bays, a heated workshop long enough to lay out and cut the house's longest timbers indoors, a loft for storage and an office, and a covered framing yard in line with it.
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The north half is one room, 60 × 24 and open to the roof, where a 41-ft timber lies on horses with room at each end. The south half holds three 12 × 24 garage bays at the east end, walled off, and the workshop's south bay under the loft, where the tunnel from the house comes up. The covered framing yard runs on west, open-sided, with timber deliveries on the apron in front of it.
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A bent every 12 ft, a centre row of oak posts under a ridge beam, so no ties cross the floor; rafters at 6/12 on plates at +15'-0". A crane beam at each bent carries a hoist track down the middle of the workshop. The loft floor is at +11'-0".
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A black standing-seam roof and steel walls over the timber frame, the overhead doors to the south, and the framing yard's plates raised to +15 ft so its crane beams carry the hoist track level, through a 12' × 12'-6" door, the whole length of the workshop.
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The framing floor down the middle under the hoist, benches and the tool wall along the north side, the machine corner in the south bay, and timber racks in the yard. Later a CNC gantry can run the workshop's length beside the track.
The envelope and the heat
A workshop, so it is built in workshop materials: sealed away, where no one lives with them.
- Walls: steel on pine nailers outside the posts, the gap behind the steel venting it; kraft-faced fiberglass between horizontal girts, about R-21, the kraft facing as the vapour retarder; pine boards inside.
- Roof: the house's warm roof in cheaper materials: boards on the rafters as the ceiling, fiberglass between sleepers, a 2-in board, a vent gap, a board deck and black standing-seam steel, about R-38.
- Floor: a slab heated by the wood boiler, over R-10 of foam board.
- Heat from the hub, the building north-east of it: buried lines come in through the east gable under the loft, feed a manifold for this floor, and run on under the loft and down the tunnel's stair to the house. No boiler and no propane in the workshop. It rests at about 45 °F and runs at 55 °F while people work; sealing the doors well matters more than more insulation.
The frame, Homestead Shop: 1,511 timbers, 26,464 board feet of green timber and 316 oak pegs.