GB408955A - Improvements in or relating to the use of reinforced concrete in buildings and the like - Google Patents

Abstract

408,955. Reinforced-concrete buildings. WILLIAMS, SIR E. O., 5, St. George's Road, Belgrave Road, London. Oct. 13, 1932, No. 28625. [Class 20 (iv).] The reinforced-concrete framework of a building structure comprises main beams 14 supported by equally spaced vertical columns or mullions 13 rigidly secured to the beams and each provided with a longitudinal flange 13c projecting transversely of the adjacent main beam, and the centre lines of the mullions are arranged to coincide with the centre lines of the transverse floor and roof beams 16, 16<a>, which are rigidly secured to the mullions to form in association therewith rigid frame units. The mullions 13 are sufficiently closely spaced to enable secondary structural elements to be dispensed with, and non-structural units, such as pre-cast concrete slabs 19, bricks or glass panels, are fitted directly between the mullions. The mullions 13 may be cast integrally with a concrete foundation 10 at spaced distances as shown in the Figure, so as to support main longitudinal and transverse beams 14, 15 at the first floor level, and such beams are, preferably, integral with the mullions. Further mullions 13<a>, aligned with the mullions 13 and preferably integral with the beams 14, 15, rise vertically to support the second floor main beams 14<a>, 15<a>, and those in turn support the mullions 13b and main beams 14<b>, 15b constituting the roof parapet. The floor beams 16, 16<a> and the roof beams extend between the longitudinal main beams and are, preferably, formed integral with these beams and the columns. The floor beams 16, 16<a> are rectangular in cross-section, with the bending moments therein substantially the same at the centre and the ends. The floor beams 16, 16<a> may be cast on shuttering units, between which are supported pro-cast slabs, tiles, metal sheets &c. adapted to constitute the base of the ceiling or the ceiling itself, and such slabs &c. may be anchored to the beams. Alternatively, the ceiling may be first cast in situ and the floor beams then cast above the same. Timber joists 18, pro-cast concrete slabs, or a cast-insitu concrete layer may be supported on the beams 16, 16<a>. Window and door frames may be fitted between the mullions. All the structural components of the building are, preferably, cast in situ.