US1587145A - Building construction - Google Patents

Description

June 1 1926. 1,587,145

I W. G. CARNEGIE BUILDING CONSTRUCTION Filed'Sept. 26, 1921 2 Sheets-Sheet 1 June 1, 1926. V

w. e. CARNEGIE BUILDING CONSTRUCTION Filed Sept. 26 1921 2 Sheets-Sheet 2 law/4511 11 2 SRDDLE Patented June 1, 1926.

UNETEED l fii i li WILLIAM G. CARNEGIE, OE CHICAGO, ILLINOIS.

BUILDING CONSTRUCTION.

Application filed September 26, 1921.

This invention relates more particularly to buildings having large clear spans, such as garages factories or the like and is particularly directed to the roof portions of such buildings. Garages as now commonly built are made with arch trusses with the roof supported on the upper chords of the trusses and the monitor mounted at the top of the trusses. This necessitates a large amount of waste space in the top of the building which requires extra heat radiators for heating the same and furthermore raises the monitor so high that it interferes with the light from the same.

One of the objects of this invention is to provide a building construction in which there will be comparatively little waste space in the top of the building. Another object is to provide a roof construction in which the monitor will be located as low as possible while providing the necessary head room. Other objects are to provide aroof construction in which the trusses are so constructed that the main portion of the roof will be supported on the lower truss chords; to provide a combined roof and monitor with the monitor built into the roof trusses and to provide such other advantages and novel features as will appear more fully hereinafter.

In the accompanying drawings illustrating my invention;

Figure 1 is a side View of a complet building;

Figure 2 is a plan View of the roof shown on a smaller scale;

Figure 3 is a cross sectional view taken on the line 3-3 of Figure 5;

Figure 1 is a plan view of a portion of the roof shown on an enlarged scale; and,

Figure 5 is a cross sectional view.

As shown in these drawings, the building 6 is provided with any suitable number of trusses 7 which preferably extend across the building but which may be arranged in any suitable manner for different types of buildings. These trusses are supported on the side walls 8. Each truss has outer top chord members 9 and inner or central top chord members 10. They also have outer bottom chord members 11 and a central member 12. The inner ends of the members 9 and 11 are connected by vertical posts or web members 26 and any suitable number of diagonal web members such as 13 and 14 may be used for bracing the serial No. 503,702.

trusses. It will be understood that these chords and web members may be secured together in any suitable or well known manner.

The joists 15 are supported at their inner ends on longitudinal beams or purlins 16 and at their outer ends on the walls 8 or by other purlins in the eventthat the outer ends of the trusses are supported on columns instead of on walls. The outer ends of the joists are preferably raised somewhat above the ends of the trusses so as to permit continuous drainage of water and thereby avoiding the necessity of numerous down spouts. The roof covering 17 for the main portions of the roof is carried directly by the joists 15 and saddles are provided along the outer portions of the roof to direct the water longitudinally of the building. For instance, in the arrangement shown in Figure 2 the down spouts 18 are positioned at the center of the building and the saddle pitches from the ends toward the center. In the arrangement shown in Figure 1, the roof of the saddle is at the center of the building and the saddle pitches toward the ends.

By means of this arrangement it will be seen that only about two-thirds of the total weight of the roof construction and about two-thirds of the live load weight is carried by trusses, the remaining portion of the live and dead load being carried by the walls. The portions of the trusses which project above the roof covering 16 are preferably boxed in by means of boxes or coverings 19 so that they will not be exposed to the weather.

The monitor 20 is built into the truss construction and may be said to form an integral part of the roof. The joists 21 of the monitor roof are supported on longitudinal beams or purlins 22 and 23 and the roof covering 24 is carried directly by these joists. The sides of the monitor are secured to the vertical posts 26 of the trusses and are preferably provided with windows which may be arranged in any suitable or well known manner. By means of this construction, the light may enter the building closer to the floor line than with the ordinary construction where the monitor is mounted above the top chords of the trusses. The construction of the trusses also permits the installation of continuous monitor sash operators without interference from any of the structural members of the trusses, thus effecting a saving in the installation of the operators and insuring more perfect ventilation. This improved construction also reduces the expense of the roof inasmuch a large portion of the load is carried di rectly bv the wells instead of by the trusses.

It will be noted that the truss may be varied in form and shape for different buildings and the parts may he changed Without departing from the scope of this invention as set forth in the following claim:

In a building the combination with the side walls, of one or more trusses supported by said walls, roof joists having their outer ends carried by the Walls and their inner ends supported by the trusses a roof covering on said joists, a central roof having joists carried by the upper chords of the trusses and a roof covering thereover and walls extending from the outer edges of the central roof portion downwardly to the inner edges of the outer roof portions thereby forming a central monitor.

WVILLIAM G. CARNEGIE.

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