WO2008144663A1 - Purlin building system for metal building roof - Google Patents

Purlin building system for metal building roof Download PDF

Info

Publication number
WO2008144663A1
WO2008144663A1 PCT/US2008/064142 US2008064142W WO2008144663A1 WO 2008144663 A1 WO2008144663 A1 WO 2008144663A1 US 2008064142 W US2008064142 W US 2008064142W WO 2008144663 A1 WO2008144663 A1 WO 2008144663A1
Authority
WO
WIPO (PCT)
Prior art keywords
brace
purlin
purlins
tabs
braces
Prior art date
Application number
PCT/US2008/064142
Other languages
French (fr)
Inventor
Clifford M. Robinson
Russell C. Burnham
Original Assignee
Butler Manufacturing Company
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Butler Manufacturing Company filed Critical Butler Manufacturing Company
Priority to MX2009012328A priority Critical patent/MX2009012328A/en
Priority to CN200880016478.6A priority patent/CN101952523B/en
Priority to CA2683197A priority patent/CA2683197C/en
Publication of WO2008144663A1 publication Critical patent/WO2008144663A1/en

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04CSTRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00Structural elongated elements designed for load-supporting
    • E04C3/02Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04CSTRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00Structural elongated elements designed for load-supporting
    • E04C3/02Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C2003/026Braces

Definitions

  • This invention relates to a purlin bracing system for a metal building roof.
  • Fig. 1 is a diagram of a typical arrangement, looking along the ridge plane "R".
  • the purlins "P” and the eave struts "E” have high bending stiffness in the vertical direction, less stiffness horizontally. In most instances, the purlins have to be braced horizontally at intervals. Determination of the proper bracing interval is a matter of ordinary skill not forming part of this invention.
  • bracing interval can be calculated from a number of parameters, including the moment of inertia on the stiff axis, the moment on the less stiff axis, the modulus of elasticity, the distribution and magnitude of the design load, and the nature of the constraints at each end of the structural member, hi practice, builders follow bracing tables which are determined mathematically or empirically.
  • FIG. 2 shows a conventional ("prior art") purlin brace arrangement in which a pair of structural angle members, having tabs at their ends, were installed between purlins by inserting their tabs through pre-formed slots in the purlins' webs. The tabs were then bent down to lock the parts together.
  • the prior designs required the use of tools of some sort. It would be an improvement to have purlin braces which could be installed quickly without tools and without specialized fasteners, and yet would remain securely in position between the purlins once they were installed.
  • An object of the invention is to improve the stability of roofs by improving the lateral bracing between purlins.
  • Another object is to simplify the construction of metal roofs by reducing the effort and tools required to brace the purlins.
  • a further object is to reduce the number of parts needed to construct a metal building roof.
  • the present invention simplifies brace installation, reduces the number of parts required for construction, and makes it possible to remove or replace a brace, again without tools.
  • Figure 1 is a diagrammatic sectional view of an array of purlins forming a double-slope ridged roof
  • Figure 2 shows a prior art purlin bracing arrangement
  • Figure 3 is a perspective view showing portions of a pair of purlins, and a purlin brace being installed between the purlins;
  • Figures 4 - 7 show sequential steps of braces being installed on either side of a purlin;
  • Figure 8 is a perspective view showing bracing installed between the purlins running on either side of the roof ridge line;
  • Figure 9 shows a double-brace construction otherwise like Figure 3;
  • Figure 10 shows a modified form of the purlin braces
  • Figures 11 and 12 show purlin braces for use at the eaves.
  • a purlin brace embodying the invention is shown in Figure 3.
  • Two Z-section purlins 10, 12 are shown, at a point in their span between supported ends not shown.
  • Each purlin has a central web 14 interconnecting upper and lower flanges 16, 18. Pairs of slots 20 are punched out of the web at predetermined intervals.
  • the slots have an enlarged central portion 24 so that either the tabs 32 of the purlin braces 30, or the threaded rods 62 of eave braces 50 (see Figs. 11 - 12) having threaded rod connections, can be inserted through the slots as an alternative.
  • the brace 30 itself is a structural steel channel member having a central web 31.
  • the tabs 32 at one end of the brace are extensions of the upper and lower flanges 33, 34 which remain after an end portion of the web has been removed.
  • FIGs 4 - 7 illustrate the assembly procedure.
  • the tabs 32 of a brace 30 are passed through corresponding slots 20 in a purlin "P" so that they protrude on the other side of the purlin, as shown in Fig. 5.
  • the square-cut end 35 of another brace 30' is placed over the tabs, the holes 36, 38 are aligned (Fig. 6), and a headed pin 40 is dropped through the holes to secure both braces to the purlin (Fig. 7).
  • This procedure is repeated at each of the brace locations, except that special braces described below are used at the eaves. All the purlin braces are installed without tools. No retainers are needed, gravity being sufficient to keep the pins in place, although retainers might optionally be used.
  • An advantage of this invention is that, by securely interconnecting the braces at both their top and the bottom flanges, the braces not only maintain the spacing between the purlins, but also prevent them from twisting. Best results are obtained if the height of the brace is substantial with respect to the height of the purlin, preferably at least half the height of the purlin.
  • a special channel ridge brace assembly 42 is provided to accommodate the reversal and the angular change.
  • the assembly comprises a pair of identical parts 44, 45 whose webs are cut, at their tabbed ends, at a predetermined angle corresponding to the design roof slope.
  • the tabs 32 are inserted through slots in the purlins on either side of the ridge, and the square ends of the parts are connected to one another by inserting a pair of pins 40 through holes 41 which are pre-formed in the upper and lower flanges of the parts.
  • Figure 9 shows another variation, where more bracing is desired, hi this situation, closely spaced pairs of braces are inserted between neighboring purlins. Otherwise, the designs are the same.
  • Figure 10 shows a variation of the invention in which the purlin braces are not channel members having two flanges, but rather are paired angle members 30", each having a vertical flange 31 ' and a single horizontal flange 34'.
  • a tab 32 is produced by removing part of the vertical flange at one end of the brace; the protruding end of the horizontal flange then serves as the tab which is inserted through one of the slots 20 in the purlin.
  • the square-cut end 35' of a second brace is then laid over the tab and a pin 40 is dropped through the aligned holes. Two short pins could be used in place of the long pin illustrated, if desired.
  • the invention in its broadest sense may be used with braces having various cross-sectional shapes.
  • FIGs 11 and 12 show braces for use at the eaves.
  • Each brace is a structural member 52 whose central web is turned down at the end to form a tab 56 through which fasteners such as screw bolts (not shown) can be inserted to secure the brace to the eave strut 60.
  • the illustrated brace has a C-section.
  • the threaded rod 62 extending from the opposite end of the eave strut is passed through the enlarged central portion 24 (see Fig. 2) of a purlin slot after a first nut 63 has been installed on it. A second nut 64 is then applied and tightened against the first.
  • the nuts can be turned in or out to adjust the exact position of the eave strut relative to the outer wall of the building. Because the eave braces are installed in vertically spaced pairs, the angularity of the eave strut can be adjusted as well.

Abstract

A purlin bracing system for metal building roof includes braces which have pairs of tabs extending from one end. A brace is arranged perpendicular to a purlins, and its tabs are inserted through slots in the central web of the purlin. Another brace is then applied on the opposite side of the purlin, and headed pin is dropped through aligned holes in the tabs to secure them on opposite side of the purlin's central web. No tools or special fasteners are required.

Description

Purlin Bracing System for Metal Building Roof
BACKGROUND OF THE INVENTION
[0001] This invention relates to a purlin bracing system for a metal building roof.
[0002] Many modern metal buildings have roof panels which are supported by purlins running parallel to the roof ridge across structural beams typically defining bays. Fig. 1 is a diagram of a typical arrangement, looking along the ridge plane "R". The purlins "P" and the eave struts "E" have high bending stiffness in the vertical direction, less stiffness horizontally. In most instances, the purlins have to be braced horizontally at intervals. Determination of the proper bracing interval is a matter of ordinary skill not forming part of this invention.
[0003] Purlins, like other long, slender structural members loaded in bending on their "stiff axis, want to deflect laterally and twist toward a less stiff axis. Bracing must be applied at proper intervals to prevent this mode of failure. The bracing interval can be calculated from a number of parameters, including the moment of inertia on the stiff axis, the moment on the less stiff axis, the modulus of elasticity, the distribution and magnitude of the design load, and the nature of the constraints at each end of the structural member, hi practice, builders follow bracing tables which are determined mathematically or empirically.
[0004] Various purlin brace designs have been proposed and used. Some are bolted in position between the purlins; others have tabs which are inserted through slots in the purlin and then are bent over to retain the brace. A good example is Parsons' patent 3,092,221.
[0005] One method which has been long used to brace purlins is to install pairs of structural angle members between the purlins. Figure 2 shows a conventional ("prior art") purlin brace arrangement in which a pair of structural angle members, having tabs at their ends, were installed between purlins by inserting their tabs through pre-formed slots in the purlins' webs. The tabs were then bent down to lock the parts together. [0006] The prior designs required the use of tools of some sort. It would be an improvement to have purlin braces which could be installed quickly without tools and without specialized fasteners, and yet would remain securely in position between the purlins once they were installed.
SUMMARY OF THE INVENTION
[0007] An object of the invention is to improve the stability of roofs by improving the lateral bracing between purlins.
[0008] Another object is to simplify the construction of metal roofs by reducing the effort and tools required to brace the purlins.
[0009] A further object is to reduce the number of parts needed to construct a metal building roof.
[0010] These and other objects are attained by a purlin bracing system for metal building roofs as described below.
[0011] The present invention simplifies brace installation, reduces the number of parts required for construction, and makes it possible to remove or replace a brace, again without tools.
BRIEF DESCRIPTION OF THE DRAWINGS
[0012] In the accompanying drawings,
Figure 1 is a diagrammatic sectional view of an array of purlins forming a double-slope ridged roof;
Figure 2 shows a prior art purlin bracing arrangement; and
Figure 3 is a perspective view showing portions of a pair of purlins, and a purlin brace being installed between the purlins;
Figures 4 - 7 show sequential steps of braces being installed on either side of a purlin; Figure 8 is a perspective view showing bracing installed between the purlins running on either side of the roof ridge line;
Figure 9 shows a double-brace construction otherwise like Figure 3;
Figure 10 shows a modified form of the purlin braces; and
Figures 11 and 12 show purlin braces for use at the eaves.
DESCRIPTION OF THE PREFERRED EMBODIMENT
[0013] A purlin brace embodying the invention is shown in Figure 3. Two Z-section purlins 10, 12 are shown, at a point in their span between supported ends not shown. Each purlin has a central web 14 interconnecting upper and lower flanges 16, 18. Pairs of slots 20 are punched out of the web at predetermined intervals. The slots have an enlarged central portion 24 so that either the tabs 32 of the purlin braces 30, or the threaded rods 62 of eave braces 50 (see Figs. 11 - 12) having threaded rod connections, can be inserted through the slots as an alternative.
[0014] The brace 30 itself is a structural steel channel member having a central web 31. The tabs 32 at one end of the brace are extensions of the upper and lower flanges 33, 34 which remain after an end portion of the web has been removed.
[0015] Figures 4 - 7 illustrate the assembly procedure. First (Fig. 4), the tabs 32 of a brace 30 are passed through corresponding slots 20 in a purlin "P" so that they protrude on the other side of the purlin, as shown in Fig. 5. Then the square-cut end 35 of another brace 30' is placed over the tabs, the holes 36, 38 are aligned (Fig. 6), and a headed pin 40 is dropped through the holes to secure both braces to the purlin (Fig. 7). This procedure is repeated at each of the brace locations, except that special braces described below are used at the eaves. All the purlin braces are installed without tools. No retainers are needed, gravity being sufficient to keep the pins in place, although retainers might optionally be used.
[0016] An advantage of this invention is that, by securely interconnecting the braces at both their top and the bottom flanges, the braces not only maintain the spacing between the purlins, but also prevent them from twisting. Best results are obtained if the height of the brace is substantial with respect to the height of the purlin, preferably at least half the height of the purlin.
[0017] At the roof ridge "R" (Figure 8), the orientation of the purlins typically reverses, and there is an angle between the purlins as well, since their webs are actually perpendicular to the respective sloping roof surfaces on either side of the ridge. A special channel ridge brace assembly 42 is provided to accommodate the reversal and the angular change. The assembly comprises a pair of identical parts 44, 45 whose webs are cut, at their tabbed ends, at a predetermined angle corresponding to the design roof slope. The tabs 32 are inserted through slots in the purlins on either side of the ridge, and the square ends of the parts are connected to one another by inserting a pair of pins 40 through holes 41 which are pre-formed in the upper and lower flanges of the parts.
[0018] Figure 9 shows another variation, where more bracing is desired, hi this situation, closely spaced pairs of braces are inserted between neighboring purlins. Otherwise, the designs are the same.
[0019] Figure 10 shows a variation of the invention in which the purlin braces are not channel members having two flanges, but rather are paired angle members 30", each having a vertical flange 31 ' and a single horizontal flange 34'. As with the channel members described above, a tab 32 is produced by removing part of the vertical flange at one end of the brace; the protruding end of the horizontal flange then serves as the tab which is inserted through one of the slots 20 in the purlin. The square-cut end 35' of a second brace is then laid over the tab and a pin 40 is dropped through the aligned holes. Two short pins could be used in place of the long pin illustrated, if desired. As this embodiment illustrates, the invention in its broadest sense may be used with braces having various cross-sectional shapes.
[0020] Figures 11 and 12 show braces for use at the eaves. Each brace is a structural member 52 whose central web is turned down at the end to form a tab 56 through which fasteners such as screw bolts (not shown) can be inserted to secure the brace to the eave strut 60. The illustrated brace has a C-section. The threaded rod 62 extending from the opposite end of the eave strut is passed through the enlarged central portion 24 (see Fig. 2) of a purlin slot after a first nut 63 has been installed on it. A second nut 64 is then applied and tightened against the first. The nuts can be turned in or out to adjust the exact position of the eave strut relative to the outer wall of the building. Because the eave braces are installed in vertically spaced pairs, the angularity of the eave strut can be adjusted as well.
[0021] Since the invention is subject to modifications and variations, it is intended that the foregoing description and the accompanying drawings shall be interpreted as only illustrative of the invention defined by the following claims.

Claims

I claim:
1. In a metal building roof comprising a plurality of substantially parallel purlins extending in a first direction, the purlins having a center web and being supported at intervals by structural building frame members, and a plurality of braces extending in a second direction, substantially perpendicular to the first direction, between neighboring purlins to prevent lateral deflection and twisting of the purlins under load, the improvement wherein at least some of said braces are channel members having a central web and upper and lower flanges, the flanges extending lengthwise beyond the central web at a first end of the brace to form a pair of protruding tabs, the purlins have pairs of slots at intervals so that the tabs of a brace can be inserted through a pair of the slots and protrude on the other side of the purlin, the brace has holes in its tabs at its first end, and holes in its upper and lower flanges at its second end, the holes of the tabs and the holes of the flanges being disposed so that they are aligned when the respective members are abutted firmly against the purlin web on opposite sides thereof, whereby the tabs of one brace may be inserted through the slots in the purlin web from one side of the and another brace may be applied from the opposite side so as to overlap the tabs, and a plurality of pins, each of which may be inserted through the aligned holes of the first and second braces to interconnect them astride the purlin.
2. The roof of claim 1, wherein each of the purlins is substantially a Z-section member having a central web extending substantially perpendicular to the surface of the roof.
3. The roof of claim 1, wherein each pair of slots is spaced width wise of the purlin web so that the braces are oriented, when installed, with their central webs substantially parallel to the roof surface.
4. The roof of claim 1, wherein the height of the brace is at least half the height of the purlin.
5. A lateral bracing system for a roof having an array of substantially parallel purlins, said system comprising a plurality of braces and a plurality of pins for interconnecting said braces, each of said braces being a channel member having upper and lower flanges connected by a central web, a portion of said web at one end of each brace being removed so that the ends of the upper and lower flanges at that end of the member form a pair of tabs, said tabs at one end of the brace and said upper and lower flanges at the other end of the brace having aligned holes through which said pins are passed to secure the braces together.
6. A method of laterally bracing an array of parallel purlins in a roof construction, said method comprising steps of forming pairs of apertures in said purlins at intervals, forming a brace from a channel member having upper and lower flanges connected by a central web by removing a portion of said web at one end of the member so that the ends of the upper and lower flanges at that end of the member form a pair of tabs, forming holes in said tabs and in the upper and lower flanges at the other end of the member, inserting said tabs from one side of the purlin through a respective pair of holes in the purlin so that the tabs extend to the other side of the purlin, overlapping said tabs with the upper and lower flanges of the untabbed end of a second similar brace, and then placing a heading pin through aligned holes in said tabs and flanges to secure the two braces together astride the purlin.
7. In a metal building roof comprising a plurality of substantially parallel purlins extending in a first direction, the purlins being supported at intervals by structural building frame members, and a plurality of braces extending in a second direction, substantially perpendicular to the first direction, between neighboring purlins to prevent lateral deflection and twisting of the purlins under load, the improvement wherein each said brace has a tab at one end thereof, the purlins have at intervals slots sized to receive said tab, so that the tab of a brace can be inserted through one of the slots and protrude on the other side of the purlin, the brace has a hole in said tab, and a hole in its second end, the hole in the tab and the hole in the second end being disposed so that they are aligned when the respective members are abutted firmly against the purlin web on opposite sides thereof, whereby the tab of one brace may be inserted through the purlin from one side and another brace may be applied from the opposite side so as to overlap the tab, and further comprising a pin which may be inserted through the aligned holes of the first and second braces to interconnect said braces.
PCT/US2008/064142 2007-05-17 2008-05-19 Purlin building system for metal building roof WO2008144663A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
MX2009012328A MX2009012328A (en) 2007-05-17 2008-05-19 Purlin building system for metal building roof.
CN200880016478.6A CN101952523B (en) 2007-05-17 2008-05-19 Purlin building system for metal building roof
CA2683197A CA2683197C (en) 2007-05-17 2008-05-19 Purlin bracing system for metal building roof

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11/749,821 2007-05-17
US11/749,821 US7752823B2 (en) 2007-05-17 2007-05-17 Purlin bracing system for metal building roof

Publications (1)

Publication Number Publication Date
WO2008144663A1 true WO2008144663A1 (en) 2008-11-27

Family

ID=40026106

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2008/064142 WO2008144663A1 (en) 2007-05-17 2008-05-19 Purlin building system for metal building roof

Country Status (5)

Country Link
US (1) US7752823B2 (en)
CN (1) CN101952523B (en)
CA (1) CA2683197C (en)
MX (1) MX2009012328A (en)
WO (1) WO2008144663A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102251629A (en) * 2011-04-13 2011-11-23 北京东方诚国际钢结构工程有限公司 Overall rigid waterproof system of building

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8393126B1 (en) * 2009-04-22 2013-03-12 Building Concepts, Ltd. Torsional braces
CA2731333A1 (en) * 2010-02-12 2011-08-12 Craig Oberg Purlin brace systems
CA2762693A1 (en) * 2010-12-20 2012-06-20 Craig Oberg Roofing suspension support
US8833025B2 (en) * 2011-01-04 2014-09-16 Advanced Architectural Products, Llc Polymer-based bracket system for exterior cladding
CN103630445B (en) * 2013-11-30 2016-08-17 安徽省(水利部淮河水利委员会)水利科学研究院 A kind of concrete core sample bending testing device
US10294670B1 (en) * 2015-11-11 2019-05-21 MGM Products, Inc. Architectural screen roof curbs
US11859387B1 (en) * 2015-11-11 2024-01-02 MGM Products, Inc. Roof curb with cantilevered objects
CN107965060A (en) * 2016-10-19 2018-04-27 北京清华同衡规划设计研究院有限公司 Tie rod connection component between purlin
US11261604B1 (en) * 2016-11-10 2022-03-01 MGM Products, Inc. Cantilevered objects
USD861196S1 (en) * 2017-03-15 2019-09-24 Clarkwestern Dietrich Building Systems Llc Drip flange with backing strip
CN108625614A (en) * 2017-03-15 2018-10-09 王昌兴 Steel building and its purlin reinforcement system
CN108756348A (en) * 2018-06-28 2018-11-06 安徽鲁班建设投资集团有限公司 A kind of photovoltaic generation bicycle shed
USD904649S1 (en) 2019-09-25 2020-12-08 Clarkwestern Dietrich Building Systems Llc Weep screed
US11339564B1 (en) 2020-11-03 2022-05-24 Advanced Fastener And Assembly Solutions Llc Purlin clip assembly and system
US11466454B2 (en) 2020-11-03 2022-10-11 Advanced Fastener And Assembly Solutions Llc Purlin clip assembly and system
US11668093B2 (en) * 2021-06-03 2023-06-06 Clinton Scott Cooper Lintel support, masonry support kit, and lintel support method
CN115075449B (en) * 2022-07-12 2023-09-01 自贡东方彩钢结构有限公司 High-strength anti-seismic building purline and preparation method thereof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4075807A (en) * 1976-01-16 1978-02-28 Alderman Robert J Method and apparatus for applying sheet material to a roof structure
US4408423A (en) * 1977-10-25 1983-10-11 Armco Inc. Roof construction with stabilized Z-purlins
US4453863A (en) * 1982-01-29 1984-06-12 Safety Lights Sales & Leasing, Inc. Trench shoring device

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3092221A (en) * 1959-08-07 1963-06-04 Parkersburg Aetna Corp Metal roof-supporting construction
GB1115425A (en) 1966-09-29 1968-05-29 Metal Trim Ltd An improved method and means for straightening purlins by sag rods in the fabrication of roof structures
US3661048A (en) 1969-06-16 1972-05-09 Town Line Erection Co Inc Fastening means for structural members
US3604176A (en) * 1969-10-24 1971-09-14 Armco Steel Corp Self-fastening spacer for structural members
US3611661A (en) 1969-12-09 1971-10-12 Textron Inc Eave strut and bracket assembly
US3973367A (en) * 1974-02-21 1976-08-10 Butler Manufacturing Company Roof structure with means to resist lateral forces
US4151694A (en) 1977-06-22 1979-05-01 Roll Form Products, Inc. Floor system
US4735029A (en) 1986-06-30 1988-04-05 Etco Building Systems, Inc. Roof system truss pin
US4715156A (en) 1986-09-02 1987-12-29 Duke Insulation Company, Inc. Support structure for roof insulation in metal buildings
DE3850115T2 (en) 1987-08-13 1994-12-22 Force 10 Holdings Pty Ltd BUILDING.
US4930285A (en) 1987-11-12 1990-06-05 Spectrum Contracting, Inc. System and method of installing roof insulation
US4840005A (en) * 1988-06-01 1989-06-20 Australian Building Industries Pty. Ltd. Purlin bridging
US5095673A (en) 1989-01-09 1992-03-17 Spectrum Contracting, Inc. System and method of installing roof insulation
US5647175A (en) * 1995-11-27 1997-07-15 Smyth; James G. Floating sub-frame for roof curbs and method of installation
US6862854B1 (en) 2000-08-14 2005-03-08 Simpson Strong-Tie Company, Inc. Single-piece continuity tie
JP3878509B2 (en) 2002-04-30 2007-02-07 パナホーム株式会社 Connection structure between main building and shed beam
US20050284081A1 (en) 2004-06-25 2005-12-29 Porter William H Building structure with purlin to beam connection

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4075807A (en) * 1976-01-16 1978-02-28 Alderman Robert J Method and apparatus for applying sheet material to a roof structure
US4408423A (en) * 1977-10-25 1983-10-11 Armco Inc. Roof construction with stabilized Z-purlins
US4453863A (en) * 1982-01-29 1984-06-12 Safety Lights Sales & Leasing, Inc. Trench shoring device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102251629A (en) * 2011-04-13 2011-11-23 北京东方诚国际钢结构工程有限公司 Overall rigid waterproof system of building

Also Published As

Publication number Publication date
CN101952523B (en) 2013-03-06
US7752823B2 (en) 2010-07-13
CA2683197A1 (en) 2008-11-27
CN101952523A (en) 2011-01-19
CA2683197C (en) 2012-10-02
MX2009012328A (en) 2010-02-11
US20080282635A1 (en) 2008-11-20

Similar Documents

Publication Publication Date Title
US7752823B2 (en) Purlin bracing system for metal building roof
US6430881B1 (en) Top plate
US8931233B2 (en) Building frame
US7673427B2 (en) Clamp for use with metal bar joists and beams
US6250041B1 (en) Hold down bracket
EP0039141B1 (en) Roof system
JP2002536574A (en) Structural members
US11286665B2 (en) Roof panel system
MX2012005600A (en) Structural reinforcement.
US20100005749A1 (en) Steel building frame system
US10030392B2 (en) Subframe support for retrofit roof
US6584741B1 (en) Reinforcement device for trusses
US20190338520A1 (en) Truss system and reinforcement
US5003748A (en) Metal frame structure
EP1630315A1 (en) Construction element for shear and punching reinforcement
US20230193618A1 (en) Connector device, system and method for constructing a roof for a building
US11519174B2 (en) Building structure formed by truss modules and method of forming
KR20050086977A (en) Apparatus for constructing structure of roof and a rafter link
EP2520740A1 (en) A fall protection hooking device and related fall protection system
JP2017101414A (en) Fitting structure of tension rod
EP1348819A1 (en) Structural members for buildings and interconnection arrangements for such members
AU2015249147B2 (en) Quick-connect fastening for use in building construction
JPH10102664A (en) Independent strut
GB2078273A (en) Building Frameworks
EP1348818A1 (en) Structural members for buildings and interconnection arrangements for such members

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 200880016478.6

Country of ref document: CN

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 08755893

Country of ref document: EP

Kind code of ref document: A1

DPE1 Request for preliminary examination filed after expiration of 19th month from priority date (pct application filed from 20040101)
WWE Wipo information: entry into national phase

Ref document number: 2683197

Country of ref document: CA

WWE Wipo information: entry into national phase

Ref document number: MX/A/2009/012328

Country of ref document: MX

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 08755893

Country of ref document: EP

Kind code of ref document: A1

DPE1 Request for preliminary examination filed after expiration of 19th month from priority date (pct application filed from 20040101)