Jack Arch Roof Construction Details

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.

Jack arch roof construction details.

Design considerations 5 1 general 5 1 1 the jack arch built up floor or roof shall consist of the following components. Unlike regular arches jack arches are not semicircular in form. Enjoy the videos and music you love upload original content and share it all with friends family and the world on youtube. A jack arches constructed with bricks laid on edge in a single course with lime mortar or cement mortar of specified mix and supported over steel or concrete i shaped joists and having a suitable ceiling finish applied on to its soffit.

Jack arch roof is composed of arches of either brick or lime concrete supported on lower flange of r s j s. Instead they are flat in profile and are used under the same circumstances as lintels. Above them concrete fill is laid providing a level surface upon which the flooring finish can be if there is another level in the structure. Jack arch roof construction where trapezoidal reinforced concrete beams are used at intervals between which hollow terra cotta blocks form small elongated multiple vaults.

The more traditional ones are called jack arches where the arches are formed in the roof itself supported by the centering while the recent researched type is arch panel roof where the arches are made on ground to be lifted up and placed. The minimum depth at the crown is kept at 150 mm.