EP0825308A2 - Pfetten und Sparren-Bausystem - Google Patents

Pfetten und Sparren-Bausystem Download PDF

Info

Publication number
EP0825308A2
EP0825308A2 EP97306224A EP97306224A EP0825308A2 EP 0825308 A2 EP0825308 A2 EP 0825308A2 EP 97306224 A EP97306224 A EP 97306224A EP 97306224 A EP97306224 A EP 97306224A EP 0825308 A2 EP0825308 A2 EP 0825308A2
Authority
EP
European Patent Office
Prior art keywords
section
purlin
sections
rafter
joint
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP97306224A
Other languages
English (en)
French (fr)
Other versions
EP0825308A3 (de
Inventor
Roy John Burns
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Voestalpine Metsec PLC
Original Assignee
Voestalpine Metsec PLC
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 Voestalpine Metsec PLC filed Critical Voestalpine Metsec PLC
Publication of EP0825308A2 publication Critical patent/EP0825308A2/de
Publication of EP0825308A3 publication Critical patent/EP0825308A3/de
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B7/00—Roofs; Roof construction with regard to insulation
    • E04B7/02—Roofs; Roof construction with regard to insulation with plane sloping surfaces, e.g. saddle roofs
    • E04B7/04—Roofs; Roof construction with regard to insulation with plane sloping surfaces, e.g. saddle roofs supported by horizontal beams or the equivalent resting on the walls

Definitions

  • This invention relates to building systems, and although the invention is particularly concerned with metal purlin assemblies in pitched roof constructions it may also find application in metal side-rail assemblies of wall constructions.
  • the invention will be described herein using the terminology of pitched roof construction where the main load supports of the roof construction, which extend from the ridge of the roof to the walls of the building, are normally referred to as rafters, and the structural members which extend at right angles to the rafters, spanning the bays defined between the rafters, are normally referred to as purlins. It should be noted however that in a wall construction it would be more normal to refer to the vertical main load supports as columns, and to refer to the horizontal structural members spanning the bays defined between the columns as side-rails.
  • Metal purlins are constructed from predetermined lengths of cold rolled section secured together to produce an elongate purlin of appropriate length.
  • the purlin which spans the bays defined between the rafters is secured to the rafters by appropriate cleats, each cleat being secured both to a rafter, and to the purl in.
  • the lengths can simply be butted end-to-end, the two adjacent ends of the section being bolted to the respective cleat.
  • Such butt joints are generally not preferred, and in practice are only used in short or uneven spans, in small buildings where the loading conditions are very light.
  • the choice for joining the cold rolled sections to form the purlin is between a sleeved joint and an overlapped joint.
  • the two lengths of section are butted end-to-end, and a predetermined length of an additional section is bolted to the butted sections across the butt.
  • the two sections and the sleeve section are then bolted to the rafter cleat.
  • an overlapped joint the two lengths of section overlap with one another, with the overlapping region disposed over a rafter.
  • the overlapping regions are then bolted together, and are bolted to the rafter cleat.
  • the overlapped joint is the strongest since there are two continuous lengths of section passing over the underlying rafter.
  • the butt joint is weakest of the three, and the sleeved joint is of a strength intermediate that of the butt joint and the overlapped joint.
  • An object of the present invention is to provide a building system wherein efficiency of material utilisation is further improved by providing a purlin system capable of meeting particular span/strength characteristics using the minimum gauge of metal in the purlin sections.
  • a building construction comprising opposite gable ends or like end supports, a plurality of spaced rafters generally parallel to said gable ends, the first and last of said rafters defining with said gable ends respective end bays and the rafters defining between them respective intermediate bays, and, a purlin spanning said bays and supported on the gable ends and said rafters, said purlin being formed from a plurality of cold rolled sections including a first, end bay, section spanning said end bay and being joined above said first rafter by an overlapped joint to a second, intermediate, section, the end of the second section remote from the first section being joined above a respective rafter by a sleeved joint to a third, intermediate, section, the n-2 th , intermediate, section being joined above a respective rafter by a sleeved joint to the n-1 th , intermediate, section, and the n th section, being an end bay section at
  • all intermediate sections are of a length such that the joint between two adjacent sections occurs over respective rafters.
  • At least one intermediate section is of a double-span length so that it can bridge an intermediate rafter.
  • the cross sectional shape of the purlin sections is such that the sections can nest with one another when overlapped.
  • the cross-sectional shape of the purlin sections is that of a "Z" comprising a web with oppositely directed flanges at its opposite longitudinal edges, the flanges and the web of each section contacting the flanges and the web of an adjacent section when the two are nested in overlapped relationship.
  • the sleeve member of a sleeved joint is a short length of material of the same cross-section nested with the two end-to-end sections so as to overlap both sections.
  • the invention further resides in a purl in for such a building construction.
  • the invention still further resides in a method of building including the assembly of such purlins and to a method of constructing a purl in.
  • FIG. 1 one face of a pitched roof is illustrated, and it can be seen that there are gable end supports 11, 12 which, in a steeled frame building would be steel gables, but which could be brick structures in a building with brick gable ends.
  • the nature of the gable ends is not particularly relevant, and it can be considered, for the purposes of understanding the invention, that the gable ends are simply supporting members parallel to, and serving the same function, as intermediate rafters.
  • the gable end members 11, 12 are a plurality of equi-distantly spaced parallel rafters 13 extending between the ridge of the roof and the upper edge of the side wall.
  • the purlins 14 extend parallel to the ridge of the roof and span all of the bays parallel to one another and usually equally spaced between the ridge and the wall. Where a purl in passes over a rafter it is normally secured to the rafter by a cleat in the form of an L-shaped bracket having one limb welded or bolted to the rafter and an upstanding limb bolted to the purlin. Such a cleat can be seen at 15 in Figure 5.
  • the invention is principally, but not exclusively, concerned with purlins of Z-shaped cross-section (see Figure 7).
  • Such purlins are formed from a number of interconnected lengths of cold rolled section and have a web 16, upper and lower integral, oppositely extending flanges 17, 18 projecting outwardly from the longitudinal marginal edges of the web 16, and each flange 17, 18 having at its free end an upturned lip 19, 21 extending parallel to the web 16. It can be seen in Figure 7 that the flange 18 of each length of section is wider than the flange 17 thereof.
  • Figures 2 to 5 illustrate two different ways of interconnecting such Z-sections to form a continuous purlin.
  • two adjacent lengths of purl in section are overlapped above a rafter 13 and are bolted together using six bolts in three spaced pairs along the length of the overlap.
  • two identical lengths of the Z-shaped section one of them must be inverted relative to the other so that the flange 17 of the one section fits within the flange 18 of the other section and vice versa.
  • each flange 17 supports, and is supported by the flange 18 of the other section.
  • the centre pair of bolts secures the purlin to the underlying rafter by passing through the upstanding limb of a cleat appropriately secured to the rafter.
  • Figure 4 and Figure 5 illustrated a sleeved connection.
  • a sleeve member is cut from a length of the same section as that from which the purlin sections are produced and is inverted, and nested with the two sections to the be joined, which have previously been positioned in end-to-end butting relationship.
  • Two pairs of bolts are then introduced through each of the purlin sections and the sleeve member to bolt the sleeve member to both purlin sections as illustrated in Figure 4. It should be noted that in Figure 5 the sleeve member 22 is shown, for convenience, held in place by fewer bolts than are depicted in Figure 4.
  • the roof construction illustrated in Figure 1 can utilise section of the same gauge throughout the whole length of each purl in, but as mentioned previously it is usual for the optimum material utilisation in a sleeved system to be achieved in such a building system by using a heavier gauge material for the purlin sections which span the end bays.
  • the rafters are again illustrated at 13, with end bay support members illustrated at 11 and 12, and cleats indicated by the reference numeral 15.
  • the purlin 14 is again constructed from a plurality of predetermined lengths of Z-section material, and the opposite end sections 14 a , spanning the end bays, are of heavier gauge than the remaining intermediate purlin sections 14 b .
  • Each end bay section 14 a of the purlin is inverted with respect to the remaining intermediate sections, and is connected to the next adjacent intermediate section 14 b by means of an overlapped joint 14 c .
  • All intermediate purlin sections 14b are connected to adjacent intermediate purlin sections 14 b by a sleeved joint 14 d .
  • the overlapped joints and the sleeved joints each utilize eight bolts rather than six as used in the previous proposals.
  • end span sections 14 a are inverted with respect to the intermediate sections 14 b of the purlin.
  • the end span sections 14 a will be positioned with their narrow flange 17 uppermost and therefore all intermediate sections will have their wider flange 18 uppermost.
  • the end span sections will have their narrow flanges outermost such that all intermediate sections have their wider flanges outermost.
  • Figures 8 a , 8 b , 8 c , 8 d , and 8 e show alternative cross-sectional shapes which can be cold rolled and lengths of which can be interconnected to form purlins in a building construction as described above.
  • the sections will in practice have one of the flanges wider than the other so that two lengths can be nested by inverting one relative to the other.
  • sleeved and overlapped joints can be made as described above.
  • the sections illustrated in Figures 8f to 8i are variants of C-sections and sleeve connections must be provided by rolling a sleeve member of the same shape, but slightly larger dimensions so that the ends of the purlin sections can fit within the sleeve member.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Joining Of Building Structures In Genera (AREA)
  • Rod-Shaped Construction Members (AREA)
  • Roof Covering Using Slabs Or Stiff Sheets (AREA)
EP97306224A 1996-08-17 1997-08-15 Pfetten und Sparren-Bausystem Withdrawn EP0825308A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9617319 1996-08-17
GBGB9617319.0A GB9617319D0 (en) 1996-08-17 1996-08-17 Building systems

Publications (2)

Publication Number Publication Date
EP0825308A2 true EP0825308A2 (de) 1998-02-25
EP0825308A3 EP0825308A3 (de) 1999-03-03

Family

ID=10798637

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97306224A Withdrawn EP0825308A3 (de) 1996-08-17 1997-08-15 Pfetten und Sparren-Bausystem

Country Status (2)

Country Link
EP (1) EP0825308A3 (de)
GB (1) GB9617319D0 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1344876A3 (de) * 2002-03-14 2004-04-14 Wuppermann Staba GmbH Pfette und Pfettenhalter
CN102817442A (zh) * 2012-09-13 2012-12-12 北京天基新材料股份有限公司 一种轻质自保温预制板体系

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4342177A (en) * 1979-06-18 1982-08-03 Smith Donald A Prefabricated steel frame building construction components and methods
US4408423A (en) * 1977-10-25 1983-10-11 Armco Inc. Roof construction with stabilized Z-purlins
EP0434559A1 (de) * 1989-12-19 1991-06-26 Profilcometube Zusammensetzung durch Überlappung von zwei Z-Profilen zur Herstellung einer Pfette, eines Riegels oder Fussbodenauflagers
WO1996023939A1 (en) * 1995-02-02 1996-08-08 The Broken Hill Proprietary Company Limited Improved c-section structural member

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4408423A (en) * 1977-10-25 1983-10-11 Armco Inc. Roof construction with stabilized Z-purlins
US4342177A (en) * 1979-06-18 1982-08-03 Smith Donald A Prefabricated steel frame building construction components and methods
EP0434559A1 (de) * 1989-12-19 1991-06-26 Profilcometube Zusammensetzung durch Überlappung von zwei Z-Profilen zur Herstellung einer Pfette, eines Riegels oder Fussbodenauflagers
WO1996023939A1 (en) * 1995-02-02 1996-08-08 The Broken Hill Proprietary Company Limited Improved c-section structural member

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
M. MITTAG: "Baukonstruktionslehre" 1971 , INSTITUT F]R BAUPLANUNG UND BAUTECHNIK , DETMOLD XP002089018 15 * page 163 * *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1344876A3 (de) * 2002-03-14 2004-04-14 Wuppermann Staba GmbH Pfette und Pfettenhalter
CN102817442A (zh) * 2012-09-13 2012-12-12 北京天基新材料股份有限公司 一种轻质自保温预制板体系

Also Published As

Publication number Publication date
EP0825308A3 (de) 1999-03-03
GB9617319D0 (en) 1996-09-25

Similar Documents

Publication Publication Date Title
US4986051A (en) Roof truss and beam therefor
US5553437A (en) Structural beam
US4773192A (en) Building structures
EP0039141B1 (de) Dachsystem
US3968603A (en) Panel for prefabricated metal buildings
JPS628562B2 (de)
EP1456483B1 (de) Plattenförmiges bauelement mit zickzackförmigen lamellen
US4937997A (en) Open web Z-shaped structural metal beam
CA2366099C (en) Interlocking truss system
US5205098A (en) Long-span decking panel
US4442650A (en) Girder construction
EP1418284A1 (de) Verfahren und Vorrichtung zum Befestigen eines Trägers
US4435932A (en) Alternating V-truss roof system and method of erection
US5491946A (en) Wide decking structure
EP0825308A2 (de) Pfetten und Sparren-Bausystem
US4432184A (en) Support for the construction of buildings
RU2059770C1 (ru) Сводчатое сооружение
WO2000037745A1 (en) Structural framework member for suspended floor systems
US4145851A (en) Structural enclosure
WO1994019559A1 (en) Building panels and buildings using the panels
GB2232427A (en) Purlin support
EP0827560A1 (de) Bauprofil
SU1275078A1 (ru) Несущий строительный элемент типа тонкостенной балки
AU685429B2 (en) Building panels and buildings using the panels
AU700471B2 (en) Roof framing system

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AKX Designation fees paid
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19990904

REG Reference to a national code

Ref country code: DE

Ref legal event code: 8566