US2543692A

US2543692A - Roof construction of buildings

Info

Publication number: US2543692A
Application number: US730773A
Authority: US
Inventors: Glover Charles William
Original assignee: Individual
Current assignee: Individual
Priority date: 1946-04-18
Filing date: 1947-02-25
Publication date: 1951-02-27
Anticipated expiration: 1968-02-27
Also published as: GB610993A

Description

Feb. 27, 1951 c. w. GLOVER ROOF cousmuc'rxou 0F BUILDINGS 2 Sheets-Sheet 1 Filed Feb. 25, 1947 Inventor Charles William 6 102787" Feb. 27, 1951 c. w. GLOVER ROOF cous'muc'rxou or BUILDINGS 2 Sheets-Sheet 2 Filed Feb. 25, 1947 K s Q Q Z W m 1 7 .0,

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:Patented Feb. 27, 1951 UNITED STATES PATENT OFFICE- ROOF CONSTRUCTION OF BUILDINGS Charles William Glover, London, England Application February 25, 1947, Serial No. 730,77 3

In Great Britain April 18, 1946 This invention relates to roof construction of buildings and is directed towards an improvement in the roof portion of the form of building which has preformed reinforced concrete members of angle form (hereinafter called ribs) which act as three-pinned arches.

In this kind of building as heretofore constructed the apex hinge has been formed by forming the ribs into round form at the ends making halved joints through which steelpins are inserted and transverse ties at apex level have been provided by rods or tubes passing through the hinges.

From one aspect, in a roof construction according to this invention, the arches formed by pairs of ribs are connected by purlins supported at each end by the ribs and connected by clamping means to the pivotal axis of the ribs.

From another aspect, the invention provides a roof construction in which the apex joint for the ribs comprises a pin preferably of steel mounted in co-operating recesses in the adjoining ends of the ribs, and the ridge purlins are clamped to the ribs by means connected to the In a typical form, rods are screwed into the steel pin co-axially therewith and are bent at right angles to pass through the ends of the purlins, a fishplate passing over the ends of the bent rods and being clamped by nuts threaded on the ends of the rods.

Other parts of the invention are embodied in the typical form which will now b described in some detail with reference to the accompanying drawings in which:

Fig. 1 is a section on the line I-I of Fig. 2 through a preferred form of apex joint,

Fig. 2 is a section on the line II-II of Fig. 1.

In the form shown, ribs I of pre-cast reinforced concrete are arranged in pairs at the desired roof angle with their adjoining ends 2 slightly spaced. These ends 2 of the ribs l are formed with co-operating semi-cylindrical recesses 3 which engage a steel pin 4 wrapped round with bituminous felt 5.

A recess 6 is provided in each rib l to one side of the centre line to receive a keeper bar 1 pro jecting from the other rib of the pair. This keeper bar I is bent substantially into a semicircle with both ends cast into the rib so that when assembled the steel pin is encircled by the keeper bars 1 on each rib. Each rib I has a recess 6 on one side of the centre line and a keeper bar 1 equally spaced on the other side of the centre line so that when two. ribs are ar- Claims. (Cl. 108-1) faces of the ribs.

2 ranged to form an arch, the keeper bar on each rib engages the recess on the other rib.

Steel rods l9 threaded at each end and bent at right angles are screwed into threaded holes 8 co-axial with the steel pin so that the rods extend for a short distance co-axial with the pin and then extend vertically upwards to above the top of th ribs.

The ends 9 of the ridge purlins It are shaped -to lie on the apex of the ribs l with a portion I i extending downwards in close proximity to the Bituminous felt I2 is interposed between the ridge purlins It and the ribs l. Holes l3 are provided in the ends of the ridge l5 purlins to receive the steel rods 19 which pass completely through the purlins.

A fish plate [4 connects the purlins ill on opposite sides of eachrib arch, this fish plate engaging the ends of the steel rods [9 on which nuts I5 are tightened to clamp the Durlins to the ribs. The fish plate is housed in recesses [6 in the top surfaces of the purlins and these recesses are filled with bituminous mastic or other suitable material.

The purlins III are of concrete suitably reinforced as by reinforcing bars ll, [8. The reinforcing bars I8 at the bottom of the section may as shown be bent into an arc surrounding the hole 13 in the end of the purlin. The ribs I are also suitably reinforced.

It will be seen that the ridge purlin acts as strut, tie and fixing purlin. The keeper bars being cast in the ribs prevent the joint opening accidentally or under reversal of stresses and the ridge pin bears concentrically on both frames.

It will be understood that the invention is not restricted to the details of the typical form described which may be modified without departing from the broad idea underlying the invention.

I claim:

1. In a roof construction of buildings, the combination of preformed reinforced concrete ribs of angle form arranged in pairs to form arches, the ribs having recesses in their adjoining ends, a pin extending transversely between said adjoining ends enabling the ribs to have pivotal movement, ridge purlins supported by the ribs and means carried by the pin clamping the ridge purlins to the ribs.

2. In a roof construction of buildings, the combination of preformed reinforced concrete ribs of angle form arranged in pairs to form arches, the ribs having recesses in their adjoining ends, a pin extending transversely between said ad- Joining ends enabling the ribs to have pivotal movement, ridge purlins supported by the ribs, rod members fixed co-axially to the pin, said rod members being shaped to pass through holes in the purlins, and clamping means on said rod members to clamp the ridge purlins to the ribs.

3. In a roof construction of buildings, the combination of preformed reinforced concrete ribs of angle form arranged in pairs to form arches, the ribs having recesses in their adjoining ends, a pin extending transersely between said adjoining ends enabling the ribs to have pivotal movement, ridge purlins supported by the ribs, rod members shaped to provide two limbs at right angles, one of said limbs of each rod being screw-connected to the pin, the other of said limbs passing upwardly through the purlins, a fish plate extending across the adjacent ends of the purlins at each arch and nuts threaded on to the ends of said rods clamping the purlins between the fish plates and the ribs.

4. In a roof construction of buildings, the combination of preformed reinforced concrete ribs of angle form arranged in pairs to form arches, the ribs having recesses in their adjoining ends, a pin mounted in the recesses to form a pivotal connection for the ribs, keeper bars encircling the pin, each of said keeper bars being fixed in the end of one rib and engaging a recess in the end of the other rib of each pair, ridge purlins supported by the ribs and means carried by the pin clamping the ridge purlins to the ribs.

5. In a roof construction of buildings, the combination of preformed reinforced concrete ribs of angle form arranged in pairs to form arches, the ribs having recesses in their adjoining ends, a cylindrical pin mounted in the recesses and forming a pivotal connection for the ribs, keeper bars encircling the pin, each of the keeper bars being'fix'ed in the end of one rib of a pair and engaging a recess in the end of the other rib, ridge purlins shaped at their ends to provide a portion lying on the top of the arch and a portion extending down parallel to the face of the arch, rod members fixed co-axially to the steel pin at each side of the arches and shaped to pass outwardly from the pin under the downwardly extending portions of the purlins and then upwardly through holes in the ends of the purlins, fish plates extending across the ends of the purlins adjoining at each arch and engaging the ends of the upwardly directed portions of the rod members, and nuts threaded on to the ends of the rod members clamping the ends of the purlins between the fish plates and the ribs.

CHARLES WILLIAM GLOVER.

REFERENCES CITED The following references are of record in the file of this patent:

FOREIGN PATENTS Country Date France 1923 Number