Jack Arch Roof Section

Jack arch roof is composed of arches of either brick or lime concrete supported on lower flange of r s j s.

Jack arch roof section.

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. Is 2118 title of legally binding document. Alternate names are flat arch and straight arch. Jack arch roof detailed section.

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. The rise of the arch is kept 1 12th of the span. Layer of concrete is then poured over the roof to straighten the roof.

The concrete layer thickness over the crown of the arch is not less than 15cm. The rise of the arch is kept equal to 1 12th of the span. Code of practice for construction of jack arch type of bult up floor or roof. The minimum depth at the crown is kept at 150 mm.

Instead they are flat in profile and are used under the same circumstances as lintels unlike lintels which are subject to bending stress jack arches are composed of. 2 4 jack arch floor or roof a type of built up floor or roof supported by iack arches having a levelling course of lime broken brick aggregate concrete laid over them and finiihed.