Steel Jack Arch Roof

Masonry and steel jack arch structure roofs floors are very heavy and behave as flexible diaphragm unless special detailing is considered.

Steel jack arch roof.

The system consists of parallel roof steel beams at about one meter distance. Materials this type of roof may be built with materials such as brick steel concrete and clay gypsum mortar. Unlike regular arches jack arches are not semicircular in form. The rise of the arch is kept 1 12th of the span.

The roofing technique in auroville is that of jack arch roof with terra cotta hollow blocks and pre cast concrete beams. Enjoy the videos and music you love upload original content and share it all with friends family and the world on youtube. A jack arch is a structural element in masonry construction that provides support at openings in the masonry. 0 3 the jack arch floor or roof is a type of composite construction consisting of a row of brick arches with a small rise and having lime concrete layer over it.

In a jack arch system steel beams or a reinforced concrete joist system span the distance between the main girders across the length of the building. Alternate names are flat arch and straight arch. Beams support the shallow brick arches which are covered and leveled by gypsum finishing. In addition to the strength of the arches the jack arch floor or roof derives strength from the lime concrete layer by 3.

The valleys of this wave like surface are filled with mortar. Good quality local bricks preferably the thinner type are placed on this base in a curved arch profile. Instead they are flat in profile and are used under the same circumstances as lintels. Each arch has a rise of only about ten centimeters.

Once the width of the room is limited say within 12 to 15 t which can be connected by wood beam or steel girder the length of the. Masonry and steel jack arch structure. Jack arch roof is composed of arches of either brick or lime concrete supported on lower flange of r s j s. Across the walls wooden or steel cross beams are placed at not more than 3 ft.

The joints are finished with rich mortar. The roofing technique which can be seen in auroville is that of jack arch roof with terra cotta hollow blocks and precast reinforced concrete beams. The joists are spaced 1 0 to 1 5 m centre to centre and are supported at their ends either on walls or on longitudinal girders. Among the advantages of jack arch roofing is unlimited length.

The minimum depth at the crown is kept at 150 mm.