Construction kits

Construction kits

extensions/building/kits.mojo gives the materials, the layered constructions and the construction set of one way of building, ready for assemble. A kit is the part of a building that other buildings reuse. A scanned apartment, a procedural tower and an imported plan that use the masonry kit have the same brick walls and concrete floors. Their structural, bearing and thermal views then read the same materials.

Use a kit

var kit = construction_kit(MASONRY_KIT)
var building = assemble(
    "row house", site, Length64(0, METER), plans,
    kit.materials.copy(), kit.constructions.copy(), kit.defaults,
    Length64(1e-6, METER),
)

kit_kind("stone") gives a kit from its name, as a manifest writes it. kit.check() refuses a kit that assemble would refuse. Each kit holds five constructions, in the order of a ConstructionSet: the outside wall, the partition, the ground slab, the floor and the roof. kit.defaults names them in that order.

The kits

Kit	Outside wall	Partition	Ground slab	Floor	Roof
MASONRY_KIT	365 mm brick, 15 mm plaster	115 mm brick	200 mm concrete	180 mm concrete	200 mm wool, 100 mm timber
STONE_KIT	1.2 m stone masonry	600 mm stone masonry	300 mm flagstones	400 mm stone vault	150 mm timber
CONCRETE_KIT	120 mm wool, 200 mm concrete, 12.5 mm board	Stud: board, 75 mm wool, board	250 mm concrete	220 mm concrete	200 mm wool, 220 mm concrete
TIMBER_KIT	22 mm timber, 140 mm wool, 12.5 mm board	Stud: board, 75 mm wool, board	150 mm concrete	220 mm timber	50 mm timber, 200 mm wool

The layers run from the outside face to the inside face. The plaster is gypsum board, and the wool is mineral wool, from extensions.building.material.

• Masonry is a European apartment block or row house.
• Stone is a church, a castle or a Roman temple.
• Concrete is a recent block.
• Timber is a North American house.

Stone masonry

stone_masonry() is the one material that the material library does not have. It is historic rubble and ashlar masonry in lime mortar.

Property	Value
Density	2200 kg/m³
Elastic modulus	3 GPa
Poisson's ratio	0.2
Compressive strength	3 MPa
Conductivity	1.7 W/(m K)
Specific heat	1000 J/(kg K)

The strength is that of the masonry, which is far below that of the stone itself.

Limits

The values are typical values, not design values, as in Building model. A layered construction has no studs or joists, so a timber frame's strength is that of its sheathing. A project must use the values of its own products and codes.