Jack Arch Roof Construction Details

The rise of the arch is kept 1 12th of the span.

Jack arch roof construction details.

Enjoy the videos and music you love upload original content and share it all with friends family and the world on youtube. Alternate names are flat arch and straight arch. Jack arch roof is composed of arches of either brick or lime concrete supported on lower flange of r s j s. 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.

Instead they are flat in profile and are used under the same circumstances as lintels. A jack arch is a structural element in masonry construction that provides support at openings in the masonry. 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. Unlike regular arches jack arches are not semicircular in form.

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.