US3241275A

US3241275A - Arched roof structure

Info

Publication number: US3241275A
Application number: US223295A
Authority: US
Inventors: Henry C Bomhardt; Ewell Walter Worthington
Original assignee: Individual
Current assignee: Individual
Priority date: 1962-09-10
Filing date: 1962-09-10
Publication date: 1966-03-22
Anticipated expiration: 1983-03-22

Description

m A s w wt H 8 2 3 m M V 0 w.

WALTER w EWELL 22 m c. a

March 22, 1966 H. c. BOMHARDT ETAL ARCHED ROOF STRUCTURE Original Filed Sept. 28, 1959 United States Patent 3,241,275 ARCl-IED R001 STRUCTURE Henry C. Bomhardt, 316 Main Ave. SW., Glen Burnie, Md, and Walter Worthington Ewell, 2008 Dulaney Valley Road, Baltimore, Md.

Continuation of application Ser. No. 842,703, Sept. 28, 1959. This application Sept. 10, 1962, Ser. No. 223,295

1 Claim. (Cl. 52-86) This application is a continuation of copending application Serial No. 842,708, filed September 28, 1959, by applicants, for Arched Roof Structure, now abandoned.

This invention relates generally to building construction structures, and more particularly it pertains to a novel arched roof deck structure and to the method and technique for the fabrication and construction thereof.

For a long time, there has been a demand for an arched roof deck system for small and medium size buildings, which is of lightweight construction, economical to manufacture and easy to install, and which will support heavy loading from wind, snow, and rain, as well as withstand other environmental conditions.

It is an object of this invention, therefore, to provide a new type of arched roof deck structure for use in small and medium size buildings which is more economical to manufacture and install than previously designed roof structures, such as poured gypsum roofs placed horizontally over steel joists.

Still another object of this invention is to provide an arched roof deck structure which is of lightweight, and which is of great strength for supporting loadings of various types.

And still another object of this invention is to provide an arched roof deck structure which can be fabricated and constructed at the building site.

Also still another object of this invention is to provide an arched roof deck structure having pleasing appearance, design, and style.

These and other objects and advantages of this invention will become more readily apparent and obvious from the following detailed description and accompanying drawing in which:

FIG. 1 is an elevation of one of a series of roof arches embodying features of the present invention;

FIG. 2 is an enlarged fragmentary perspective of one corner of an arched roof with certain elements broken away; and

FIG. 3 is a further enlarged fragmentary section taken on line 3--3 of FIG. 2.

Referring now to the drawings, there is shown an arched roof deck which is indicated generally by reference numeral and which embodies features of the present invention. A plurality of precurved bulb-tee members 12 are arranged in spaced relationship along base plates 16 and are welded thereto. The plates 16 are spaced apart and are carried by supports 18 which can be of any selected configuration.

Formboards 20 are installed between the precurved members 12, and rest upon flanges 14 which are formed integrally with the members 12. A welded wire mesh 22 is then placed over the elements thus far erected and then welded to only the outer members 12.

A layer of material 24 such as concrete, gypsum, perlite, zonolite, or equivalent material, is then poured onto the formboards 20 to a height suflicient to cover the wire mesh 22 where it crosses the member 12 as best illustrated in FIG. 3.

Care is taken throughout the material pouring operation to keep the mesh 22 elevated slightly above the formboards 20 so as to insure complete containment of the mesh Within the material 24. At this point, the material 24 can be finished-oil? by conventional methods.

Where the poured material crosses the valley formed by the ends of adjacent arches 10, it can be formed into a fillet as best illustrated at the extreme right end of FIG. 1.

If dictated by the design of supports 18, tie rods 26, shown by dotted line in FIG. 1, may be installed between the baseplates 16, to interlock the adjacent span sections together and prevent them from movement.

Obviously, many modifications and variations of the present invention are possible in the light of the above teachings. It is, therefore, to be understood that within the scope of the appended claims the invention may be practiced otherwise than as specifically described.

What is claimed is:

An arched roof deck structure, comprising, a pair of parallel spaced base members having substantially parallel upper surfaces, a base plate having upper and lower surfaces, said lower surfaces of said base plates being positioned along the upper surfaces of each of said base members, a plurality of identical parallel spaced precurved members arranged in arch fashion substantially transversely to said parallel spaced base members and having terminating end surfaces, with said terminating end surfaces of said precurved members being flush with the upper surfaces of their respective base plates, means for integrally securing the ends of said precurved members to their respective base plates of said spaced base members, spaced tie rod members secured to said base plates to interlock said base plates and said precurved members as an integral unit, each said precurved member being of bulb-tee cross section and having oppositely extending flanges at the lower surface arranged transversely to the longitudinal direction of said precurved members and running lengthwise thereof, with the length of each said precurved member being large compared to the depth of said precurved member, formboards positioned between adjacent inner flanges of said precurved members, mesh material arranged substantially parallel to said formboards and spaced between said precurved members and over the upper surfaces of said precurved members, and moldable and settable material arranged in uniform thickness on said formboards and at a height sufficient to cover said mesh material and the upper surfaces of said precurved members, with said precurved members being subjected to compressive forces due to their own weight and the additional weight of said formboards, mesh and settable material, and to external loading.

References Cited by the Examiner UNITED STATES PATENTS 541,213 6/1895 Platt 52-87 791,265 5/ 1905 Himmelwright 52339 865,477 9/1907 Cobb 52-335 1,464,711 8/1923 Hoge 52-338 2,233,054 2/1941 Heeren 52-435 2,245,690 7/1941 Krueger 5288 2,415,709 2/1947 Sechaud et a1 5274l FRANK L. ABBOTT, Primary Examiner.

HENRY C. SUTHERLAND, Examiner.