WO2004057129A1

WO2004057129A1 - The roofing-drainage system for large-span buildings

Info

Publication number: WO2004057129A1
Application number: PCT/HR2002/000065
Authority: WO
Inventors: Milovan SKENDŽIC; Branko ŠMRČEK
Original assignee: Mara-Institut D.O.O.
Priority date: 2002-12-23
Filing date: 2002-12-23
Publication date: 2004-07-08
Also published as: TWI223023B; TW200412390A; AU2002363910A1

Abstract

The new roofing-drainage system abandoning secondary beams with valleys of the roofing sheet directed along the longitudinal axis of the roof, parallel to the roof ridge allows the roof to be drained over the entire roof surface. The elimination of secondary beams significantly reduces the roof cost not only in material spend itself but also lessening the installation time of the roof sheet. Roofing sheet panels are supported directly by several transversal beams-channels of the roof construction passing over them continuously. The transversal beams, being sloped under-roof channels themselves, collect water passing through plurality holes bored along longitudinal channels. One more benefit is that such roofs can hold snow, preventing if from sliding and falling down from the roof, without additional devices.

Description

THE ROOFING-DRAINAGE SYSTEM FOR LARGE-SPAN BUILDINGS

TECHNICAL FIELD

The present invention relates to roof coverings and in particular to a roof-covering system that diverts the flow of water along parallel channels.

BACKGROUND ART

The gently slopped roofs covered by corrugated sheet panels, directing water towards the roof eaves is fairly common roof style used at large span buildings, such as industrial buildings, warehouses and the like. One particular disadvantage of such convenient roofs is use of secondary beams, used for supporting roofing panels, positioned across the main transversal beams. This may be unnecessary spend of material requiring the time consuming installation and fixing the sheet panels at each secondary beam by a plurality of screws.

The present invention seeks a more economic roof with valleys of the roofing sheet directed along the longitudinal axis of the roof, parallel to the roof ridge, eliminating in that way secondary beams. The elimination of secondary beams, according to the present invention, significantly reduces the roof cost not only in material spend itself but also lessening the installation time of the roof sheet.

It is also an object of the present invention to collect water, to direct it and to drain the roof in a special manner. One more benefit of the present invention is that such roofs can hold snow, preventing it from sliding and falling down from the roof, without additional devices.

DISCLOSURE OF THE INVENTION

The basic purpose of the present invention was to eliminate secondary beams used in convenient roofs for carrying the roofing sheet lessening in that way the material spend and reducing the time consuming installation, attempting thereby to achieve a more economical roofs than those of the prior art are.

Abandoning secondary beams, the ordinary corrugated roofing sheet panels of the required depth are fixed directly to primary transversal sloping roof beams forming in that way the sloped planes of the roof. Roofing panels are positioned continuously over several sloped transversal beams perpendicularly to them so that plurality of longitudinal water channels parallel to the roof ridge are formed, as shown in Fig. 1.

Longitudinal water channels, presenting in fact plurality horizontal gutters at different levels, collect rain water from their belonging surface areas. When rain falls, such a horizontal channels form slight water flows whereby water flowing gently along the mild slope of the channels tends to pool. Each horizontal channel is supplied by an array of holes along its length placed at bottom of the valley, next to the sloped lower side of the channel, as illustrated in Fig. 1 and Fig. 2. As water flows along the channel following the bottom of a sheet valley, near is lower sloping side, the flow passes just over perforations being in that way drained along the entire length of the channel through them. The drain ing-holes along the longitudinal line of the channel are positioned at specific points, just over the sloped transversal beams-channels at tops of transversal beams. Each roofing sheet panel is supported by several transversal beams-channels of the roof construction passing over them continuously as shown in Fig. 1. The transversal beams, being sloped channels themselves, collect water passed through plurality of holes bored along longitudinal channels whereby the transversal perforation lines of the roofing sheet panels coincide with their supporting lines lying exactly over the transversal channels. Thus the present invention provides a roofing-drainage system which allows the roof to be drained over the entire roof surface. The direction of the water flow inside of a single horizontal channel is not predetermined. If the channel was ideally horizontal water would tend to stand and pool. As no channel can be ideally horizontal water flows in any direction along the channel along the gentle longitudinal slope to the nearest drain-hole. In any case there will be no standing water of a considerable amount. If the low or predetermined volume water appears everything works as described. Flow along the channel next to its lower side can cause no any harm even if the high volume flow appears. If superfluous water, due to extremely high volume appears it can simply transit downwards to the adjacent lower channel and so further, as shown in Fig. 3. The roofing sheet panels may be of any convenient form, but preferably have corrugations of trapezoidal cross-section having planar tops and planar bottoms. Hence, the system of present invention provides a mean to direct and control the flow of water as it flows down from the entire roof surface. DESCRIPTION OF DRAWINGS Fig. 1 is an isometric view of the present invention system.

Fig. 2 is a longitudinal section taken substantially through the sloped transversal channel.

Fig. 3 is a cross-section through roofing panels illustrating the run of superfluous water downwards the roof. Fig. 4 is a cross-section of the roof taken perpendicularly to the under-roof beam- channel at the place where panel passes continuously. Fig. 5 is a cross-section of the roof taken perpendicularly to the under-roof beam- channel at the interrupt of roof panels.

Fig. 6 is an isometric under-view of the another embodiment of the present invention system where transversal under-roof channels were replaced by under-roof pipes that don't depend on transversal roof beams. DESCRIPTION OF THE PREFFERED EMBODIMENT The ordinary corrugated roofing sheet panels (1) are positioned continuously over several sloped transversal beams (2), perpendicularly to them, forming in such a way a plurality of longitudinal water channels (1.1) parallel to the roof ridge, as shown in Fig. 1. In transversal direction, towards the roof eves the roofing panels (1) overlap each other in a simple manner as denoted by (1.3) in Fig. 1. In the longitudinal direction the long roofing panels are supported continuously, by several transversal beams (2). Ends of roofing panels, at interrupts, are positioned close each to other with only a small distance (1.4) between them left. The longitudinal water channels (1.1) collect rain water from their belonging surface-areas directing it along the gentle longitudinal slopes. At such gentle slope water tend to pool and puddle. Each horizontal channel is supplied by an array of perforations along its length at bottom, next to the lower sloped side of the channel, as seen from Fig 1. and Fig. 2. As water flows along the longitudinal channel (1.1) following its bottom the flow passes just over the longitudinal perforation line (1.2) being thereby drained along the entire length of the longitudinal channel (1.1) through the draining-holes (3) into the sloped under-roof channels (2.1) of the transversal beams (2). The transversal channels (2.1) collect water passed through holes (3) along the transversal perforation lines (2.2), positioned exactly over the transversal channels. Thus, each longitudinal axis of the transversal channel (2.2) coincides with the transversal perforation line (2.2). All the draining holes (3) comprise cones made by a special cone-pike tool, protruding towards the transversal channels (2.1). The purpose of cone ending holes (3) is to form drops or flows, preventing in that way the sliding-leakage effect around the holes.

From transversal channels (2) ending with barriers (4.1) made of concrete or of any other waterproof material collected water flows through water-tightly incorporated drain pipes (4.2) to main the horizontal gutters (4) at both eves of the roof, as obvious from Fig. 1. The volume of the water that can pass through holes belonging to one single transversal channel per a time unit can be exactly predicted wherewith a necessary cross section of the transversal channel (2) can be determined to prevent overflow at the barriers (4.1). If an overflow at the barrier (4.1) occurs the superfluous water will flow out through the pipe (4.3) as shown in Fig. 6. Water collected in the main horizontal gutters (4) is drained vertically in a convenient way. The roofing sheet panels (1) directed in longitudinal direction being supported by several transversal beams (2) pass over them continuously as shown in Fig. 1. A longitudinal section of the roof, shown in Fig. 4, is taken perpendicularly to the transversal girder (2), showing the cross-section of the transversal beam (2) with channel (2.1) and the detail of fixing roofing panels (1) passing continuously over it. Fig. 4 also illustrates the drainage of the horizontal roofing sheet valley (1.1). The two extended thin walled sides (2.3) of the concrete transversal beam (2) forming the channel (2.1) are ended by small-size steel tubes (2.4). In an embodiment with a steel transversal beam everything becomes much easier to carry-out. The roofing sheet panels (1) are fixed to small-size tubes (2.4) by ordinary screws (5). In one another embodiment the small-size tubes (2.4) can be replaced by wooden edges anchored to the concrete of thin-walled sides of the channel. The transversal channel (2) must be of a proper depth and width to ensure the satisfactory drainage capacity. The transversal channels can be formed as upper integral parts of the roof beam, as shown in Fig. 4, or carried-out by separated gutters leaned against any sloped transversal girder whereby numerous variants of embodiments are possible. Fig. 5 is a longitudinal section through the roof, taken perpendicularly to the transversal roof beam (2), showing the detail at longitudinal interrupt of two roofing panels (1). The adjacent roofing sheet panels (1), along the interrupt line over the transversal roof beam channel (2.1), are fixed by screws (5) to the tubes (2.4) ending the top edges (2.3) of the channel. The corrugations of sheet panels leaned against the tubes (2.4) are thereby fulfilled by the sponge-rubber impregnated gaskets (6) tightened strongly by screws (5) at both sides of the channel (2.1). The longitudinal distance (1.4) between two adjacent ends of the roofing sheets (1) is placed exactly over transversal channel (2.1) and is thereby utilized to drain roof water instead of perforations over transversal channels (2.1), as it was in previous detail, shown in Fig. 4. At extreme rain the superfluous water can't be drained trough the system but flows directly over cascades of corrugated sheets towards roof eaves, falling down from the roof, as it was shown in Fig. 3. Such a case is extreme and can appear only very seldom.

In the second embodiment the transversal channels can be carried-out undependably on under-roof beams as channels or pipes below the roofing cover, as shown in Fig. 6. The under-roof sloped pipe-channels (8) supplied by plurality of holes (3) are positioned at some distances independently of under-roof beams (9).The cones of the holes (3) protrude into the pipes (8) from above preventing a leakage. The under-roof sloped pipe-channels (8), designed to ensure the satisfactory drainage capacity thereby collect water which is further drained in the same manner as in previous embodiment.

Claims

1. The roofing-drainage system for large-span buildings with longitudinally directed, corrugated sheet panels (1), passing continuously over several transversal beams (2), being fixed directly to them, characterized in that, horizontal channels (1.1) comprise perforations of cone downwards-extended holes (3) along the longitudinal draining line (1.2) used to drain horizontal channels (1.1) and along the transversal draining lines (2.2) coinciding with the transversal sloped under-roof channels (2.1) ending by the barriers with the incorporated drain pipes (4.2) connected to the main horizontal gutters (4) at eves of the roof.

2. The roofing-drainage system for large-span buildings according to claim 1 , characterized in that, the corrugated sheet panels (1) are supported directly to transversal beams (2) and fixed by screws (5) to the extended thin walls of the beams (2) forming under-roof channels (2.1). 3. The roofing-drainage system for large-span buildings according to claim 1 , characterized in that, adjacent roofing sheet panels (1), along the interrupt line over the transversal roof beam channel (2.1), are fixed by screws (5) to the tubes (2.4) ending the top edges (2.

3) of the channel whereby the corrugations of sheet panels leaned against the tubes (2.4) are thereby fulfilled by the sponge-rubber impregnated gaskets (6) tightened strongly by screws (5) at both sides of the channel (2.1).

4. The roofing-drainage system for large-span buildings according to claim 1 , characterized in that, the transversal channels (2) end with barriers (4.1) made of concrete or of any other waterproof material supplied by water-tightly incorporated drain pipes (4.2) leading to main horizontal gutters (4) at both eves of the roof.

5. The roofing-drainage system for large-span buildings according to claim 1 , characterized in that, the transversal under-roof channels (2) were replaced by under-roof pipes (8) that don't depend on the arrangement of transversal roof beams.