Assemblies, layer by layer
The walls, floors, roofs and fixtures of a New York mid-rise, each with its layers in order, its build steps by trade and, for walls, materials per 100 sf.
CMU stair and elevator shaft wall
A 2-hour block shaft wall, reinforced and grouted, with furring and board on the room side.
Brick veneer on 12 in CMU exterior wall
A brick-faced block exterior wall with spray-foam insulation and a furred interior face.
Stucco on 10 in CMU exterior wall
A stucco-finished block side wall on wire lath and felt, insulated and furred inside.
10 in CMU bearing wall
A plain reinforced block bearing wall, grouted at the bars.
2-hour metal stud partition
3 5/8 in studs with two layers of 5/8 in Type X board each side, for corridors and demising walls.
1-hour wet wall on 6 in studs
A plumbing wall with water-resistant board, deep studs for the pipes, and batt insulation.
Interior metal stud partition
A non-rated apartment partition with an acoustic blanket.
12 in concrete foundation wall
The cellar's reinforced concrete perimeter wall.
Composite steel deck floor on W8 beams
Steel beams, composite metal deck, shear studs, mesh and lightweight concrete.
Slab on grade
Gravel, vapor barrier, mesh and a concrete slab for the cellar floor.
Rated gypsum ceiling under the floor
Two layers of Type X board on ceiling framing, with batts.
Bulkhead roof: insulation and membrane
Polyiso, tapered insulation and a membrane over the stair and elevator bulkheads.
Green roof modules over waterproofing
Planted modules on a self-adhered membrane, cover board and insulation.
Steel pan stair with concrete-filled treads
Channel stringers, steel pans, concrete fill and vinyl treads.
Steel stair landing on deck
A channel header and wall angle carrying a concrete-filled deck.
Kitchen base cabinets and countertop
Base cabinets with countertop and backsplash, as drawn on the plans.
Bathtub with waste, vent and supplies
A bathtub with its rough-in, set after the wet wall is framed.
Water closet with waste, vent and supply
A toilet with its 4 in waste, vent and cold water.
Lavatory with waste, vent and supplies
A bathroom sink with its trap, vent and hot and cold water.
Trash compactor and refuse chute
The cellar compactor under a stainless refuse chute.
Steel roof guardrail
A 3 ft 6 in painted steel pipe railing with pickets, posts sleeved into the curb.