Classifications

• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
  • E04D13/00—Special arrangements or devices in connection with roof coverings; Protection against birds; Roof drainage ; Sky-lights
  • E04D13/10—Snow traps ; Removing snow from roofs; Snow melters
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
  • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
  • E04G21/32—Safety or protective measures for persons during the construction of buildings
  • E04G21/3261—Safety-nets; Safety mattresses; Arrangements on buildings for connecting safety-lines
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
  • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
  • E04G21/32—Safety or protective measures for persons during the construction of buildings
  • E04G21/3261—Safety-nets; Safety mattresses; Arrangements on buildings for connecting safety-lines
  • E04G21/3276—Arrangements on buildings for connecting safety-lines

Definitions

• the present invention relates to a guard rail for the ridge and eave of house roofs, comprising at least two upright posts adapted to be attached to the roof at a dis- tance from each other along the ridge or the eave of the roof, and a rail bar running between the posts.
• the guard rail is intended to increase the safety of persons carrying out work on a roof, for example platers and snow shovel ⁇ lers, when moving on the roof, and to serve as a hold for life lines during such work.
• the guard rail is particularly intended to be set up on roofs of corrugated sheets but can also be set up on other roof constructions.
• guard rails along the ridges and eaves on house roofs, and standards have been issued for the design and dimensioning of such guard rails, for example the Swedish Standard 83 '13 01.
• These prior art guard rails consist of upright posts and rail bars, the upright posts being rigid supports unresiliently attached to latches or other fixed parts of the roof const ⁇ ruction, and the rail bars being rod-shaped elements each one running through or past at least two posts.
• Guard rails for ridges or eaves of the above mentioned design have at least two disadvantages. Firstly, the unre- siliently attached upright posts give a very abrupt braking of a person whose life line is attached to such a guard rail, if the person falls down from the roof. Such an abrupt braking can cause a situation in which the falling person is hurt by the life line. Secondly, the guard rails are difficult to set up on roofs of corrugated sheets, because the distance between the load carrying latches is long and other fixed parts of the roof construction normal ⁇ ly are unavailable in the positions where the guard rails are to be set up. Disclosure of Invention
• the main object of the invention is to provide a guard rail for ridges and eaves that gives a softer braking of a falling person having the life line attached to the guard rail.
• a further object of the invention is to provide a guard rail that is easy to set up on roofs of corrugated sheets, even if the sheets are comparatively thin, for example 0,5 millimetres.
• Fig. 1 is a side view of a portion of a guard rail for an eave with an upright post and a rail bar, the guard rail being set up on a sloping roof of corrugated sheets.
• Fig. 2 is a view as seen from the ridge of the guard rail shown in Fig. 1.
• the guard rail shown in Figs. 1 and 2 comprises four upright posts 10 attached to the corrugated roof sheets 12, and one rail bar 11 attached to the four upright posts 10.
• the upright posts 10 consist of a substantially U-shaped support having two legs 13,14 and a connecting portion 15 running between the legs, as shown in Fig.l.
• the legs 13,14 have different lengths, the longer leg 13 facing the ridge and the shorter leg 14 facing the eave 16.
• the free ends of the legs 13,14 are attached to the sheets 12 in a way that will be further explained below.
• the connecting portion 15 between the legs is substantially straight and forms an angle of 23° with the plane of the roof sheets.
• the portion 15 is spaced from the roof sheets 12, and the distance is about 150 millimetres at the longer leg and about 40 milli ⁇ metres at the shorter leg.
• the portions of the support lie in a plane perpendicular to the roof sheets 12 and the roof eave 16.
• the rail bar 11 consists of an angle bar having two legs 17,18 forming an angle of 90° with each other, and is attached to the upright posts 10 by means of screws 19 pas- sing through the one leg 17 and through the long leg 13 of the supports, the other leg 18 being extended over the upright posts 10 and abutting their connecting portions 15.
• the long leg 13 of the support which leg faces the ridge, is at its free end bent to a lug 20 provided with a hole for a fastening screw 21.
• Said screw passes through the roof sheet 12 and engages with threads provided in a section bar 22 positioned under the roof sheet 12, as shown in Fig. 1.
• the section bar has a length which is substan ⁇ tially longer than the distance between the legs 13,14 of the support 10 and runs below the full length of the sup ⁇ port, so that also the other leg 14 of the support can be attached to the roof sheet 12 by means of the section bar 22.
• the leg 14 is attached to the roof sheet 12 by means of an angle bar 23 having two legs 24,25 which form a substantially right angle with each other, the leg 24 being attached to the leg 14 by means of a screw 26 and the leg 25 being attached to the section bar 22 by means of a screw 27 passing through an elastic washer 28, for example of butyl rubber, and the sheet 12.
• the angle bar 23 runs in parallel with the rail bar 11 and the eave 16 and has the same length as the rail bar, as shown in Fig. 2.
• the leg 24 of the angle bar has substantially the same height as the leg 14 of the support, so that the leg does not extend app ⁇ reciably over the angle bar.
• the section bar 22 is attached to the roof sheet 12 by means of a further screw 29.
• the angle bar 23 is intended to provide a foot hold for a person who may be sliding below the rail bar 11, and to prevent that snow, tools and material possibly lying on the roof can slide down from the roof.
• the upright posts 10, the rail bar 11, the section bar 22 and the angle bar 23 may consist of aluminium or of an aluminium alloy.
• the guard rail described above is intended to be posi ⁇ tioned either on or at the ridge of the house roof or at the eave to provide a support for persons who have to move over the roof, or to serve as a hold for life lines for the persons who work on the roof. The heaviest load on the guard rail arises when a person whose life line is attached to or adjacent an upright post falls over the edge of the roof.
• the upright post must stand a pull in the life line from a falling body having the weight of 100 kilograms and falling 3 meters.
• the upright post in the guard rail according to the invention will operate in the following way, assu ⁇ ming that the life line is attached to the rail bar adja ⁇ cent an upright post. Due to the arising shock load, the longer leg 13 of the upright post at the point where it is fastened to the roof will be bent towards the eave. The angle bar 11 will then be turned, so that the angle leg 18 with its front edge, which extends over the post, forces the connecting portion 15 downwards, so that this portion is bent.
• the turning of the rail bar 11 includes partly a tor- sional turning of an angle bar, because the angle bar is attached to the adjacent upright post, and this provides a good absorption of forces, and partly a downward bending of the connecting portion 15 adjacent the leg 13, and this facilitates the deformation of the connecting portion 15 and, thus, further supports the absorption of forces.
• the upward bending of the angle bar 23 is made easier by the elastic washer 28 positioned at the fastening screw 27, so that the angle bar 23 easier is coiled up over the faste ⁇ ning screw.
• the deformation of the angle bar 23 contributes to the soft braking of the falling body.
• the assembly of the guard rail on a house roof of cor ⁇ rugated sheet is highly facilitated by the use of the long section bar 22 which can be provided with holes for the fastening screws 21, 27 and 29 and then inserted from the edge of the roof below a roof sheet 12 into a ridge of the sheet, so that the holes of the section bar will be posi ⁇ tioned just below previously made holes in the roof sheet.
• This fastening method enables a fast and simple assembly of the guard rail also on existing roofs.
• the fastening bars are attached to the underside of the roof sheets, before the sheets are mounted on the roof.
• the upright post shown in Fig. 1 is intended to be attached directly to the roof sheet.
• the connecting portion 15 of the upright posts can be provided with bends or angles, so that the deformation is facilitated.
• the rail bar can then alternatively consist of a bar which does not have a cross section in the shape of an angle.
• the legs of the upright post can also be designed in another way, and the shorter leg can for example extend over the bar 23 in front of the leg, and said bar can also have another shape of the cross section, so that the leg is bent over the bar due to the shock load.
• Other materials than aluminium and aluminium alloys can also be used, for example steel or steel alloys.
• the low coefficient of elasticity of aluminium and aluminium alloys as compared with for example steel contributes to a softer braking of a falling body.
• the upright posts 10 and the bars 11 and 23 can be designed in many ways. Essential for the application of the invention is only that the upright posts and possibly the bars when absorbing the shock load are deformed to such an extent, that a falling body is softly braked.

Landscapes

• Engineering & Computer Science (AREA)
• Architecture (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• Mechanical Engineering (AREA)
• Ladders (AREA)
• Steps, Ramps, And Handrails (AREA)
• Emergency Lowering Means (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=20356005

Family Applications (1)

Country Status (3)

Cited By (8)

Families Citing this family (1)

Citations (3)

• 1984
  • 1984-05-23 SE SE8402788A patent/SE455870B/sv not_active IP Right Cessation
• 1985
  • 1985-05-23 WO PCT/SE1985/000216 patent/WO1985005395A1/en unknown
  • 1985-05-23 EP EP85902713A patent/EP0181913A1/en not_active Withdrawn

Patent Citations (3)

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