The building slab is a 5” thick concrete slab located on top of rammed earth tire walls. The tire walls are topped with an 8” deep concrete bond beam to stabilize them and the building slab is supported by a concrete beam frame tying into this bond beam and concrete columns founded on individual square footings at the level below.

The building structure consists of two rows of 9’ tall columns carrying a continuous 35’ long beam following the North-South axis. The columns and beam on the West side are made of bamboo while those on the East are made of concrete. Most of the columns are sitting right above the tire walls located below and thus do not require proper foundations.

Eight evenly spaced bamboo trusses span between the two rows of supports. The trusses have a triangular shape and are 14’ tall by 46’ wide. The truss members are linked using plywood boards and bolted connections. Pine boards span between the top chords of the trusses and are covered by shingles made out of plastic bottles. Boards also span between the bottom chords of the trusses to separate the roof space from the rest of the building.

Non-structural walls fill the space between the columns creating the delimitation with the outdoor space. The total slab area is 1690 sq ft while the interior space measures 870 sq ft. The outdoor part of the slab is sloped towards its edges in order to evacuate rainwater.

Walls are made of ecobricks and cob (earth + sand + straw). Glass-bricks (two bottle bottoms taped together) are added in the walls to illuminate the space. The interior plasters are made of two layers, a form coat (cement + lime + coarse sand) and a final coat (cement + lime + fine sharp sand), while the external side of the walls is covered with fine cob (sifted earth + sifted sand).

Doors are framed with additional concrete columns sitting on the tire walls of the structure below.