WO2008144663A1 - Purlin building system for metal building roof - Google Patents
Purlin building system for metal building roof Download PDFInfo
- 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
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C2003/026—Braces
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
Description
Claims
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)
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)
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)
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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 |
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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 |
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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 |
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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 |
-
2007
- 2007-05-17 US US11/749,821 patent/US7752823B2/en active Active
-
2008
- 2008-05-19 CA CA2683197A patent/CA2683197C/en active Active
- 2008-05-19 CN CN200880016478.6A patent/CN101952523B/en not_active Expired - Fee Related
- 2008-05-19 WO PCT/US2008/064142 patent/WO2008144663A1/en active Search and Examination
- 2008-05-19 MX MX2009012328A patent/MX2009012328A/en active IP Right Grant
Patent Citations (3)
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)
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 |
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