The Future of Design. Purlin Systems 248 DESIGN EXAMPLE TOP NOTCH PURLINS Selected Loadings Dead Load G 012 kPa Live Load Q 025 kPa Snow Load Su 05 kPa Outward Limit State.
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Calculation for optimum purlin section.
. For example a DHS purlin designed as a load-bearing post will likely be limited by the capacity of bolts used at supports. Roof purlin design example. These purlins feature a fluted web which adds strength and provides a flush external face when used with flat headed fascia bolts.
With this design method an optimization tool and a set of optimum. The example is documented in a live calculation notebook. Once these are understood the basic sequence is.
The integrated design method is general for any shape of cold-formed steel purlins. It will be seen that the columns and rafters are tapered to match the general shape of the gravity bending moment diagram and the high moments at the column-rafter junction and at the apex can thus be accommodated by the deeper section. For purlin design purposes within the scope of this manual the following list outlines the main cladding types to be considered.
SEPT EMBER 20 20. However in this thesis the investigations are concentrated on Z-shape and Σ-shape cold-formed steel purlins. Today every roof purlin is considered as a separate component and the effect of spatial variation in the demand loads and potential redistribution and load sharing in the roof system capacity are ignored in design.
1establish the required inward and outward loads normally using as1170. Design inputs are defined first including cross-section dimensions and orientation span lengths roof slope and bracing provided by the standing seam to the purlin line. 134 Purlin design 81 135 Side rails 87 136 Cladding 88 14 SERVICEABILITY ASPECTS OF FRAME DESIGN 92 141 Deflections 92 142 Thermal expansion 95 15 PORTAL FRAMES IN FIRE BOUNDARY CONDITIONS 98 151 Introduction 98 152 Building regulations 98 16 REFERENCES 100 APPENDIX A Preliminary design methods 105 A1 Introduction 105.
This example provides a step-by-step strength calculation of a 4-span continuous Z-purlin system supporting a standing seam roof. FPURLIN DESIGN fffCalculation of width of pressure coefficient zone a a. The new wind maps are now specified at the strength design level Load Resistance Factored Design rather than the service design level Allowable Stress Design.
Smaller of a 01 225 m 225 m governs or a 04 162m 1648m but not less than a 004 225 09 m. 1 restraining type metal cladding 2 non-restraining type metal cladding 3 hook bolt fixed cladding 4 tiled roofs lateral restraint is usually provided to the purlin where normal trapezoidal or composite cladding is. FASCIA PURLIN DIMENSIONS A mm B mm C mm D mm.
H 15 tan 10 264m 10º where. Purlin pdf - design example pdf Design tables according to Eurocodes. Committee on Specifications for the Design of Cold-Formed.
Fichier PDF Roof truss design Load calculation Purlin design Member design IS code Steel truss. Where DHSpurlins are designed to take solely axial load the design of the bolted connections must be considered. Individual mass and steel grade for each Stratco section size is included in the table below.
A typical single-span frame of this design is shown in figure. Designing of roof trusses as per is 800 and is 875 part 1 2 and 3. Structural Design Example Four Span Metal Building Z-Purlin Line Supporting a Standing Seam Roof RESEARCH REPORT RP20- 5.
Global Product Innovation for a Complex World Lorraine Justice 05 Free. The material contained herein has been developed by researchers based on their. Embed Size px TRANSCRIPT.
Structural Design Example Four Span Metal Building. 13 likes. Component reliability is established by first-order reliability methods implemented through load and resistance factor design.
Easy design in software MetSPEC 12intensively researched the behaviour of purlin and girt systems. These methods are illustrated in DHS Purlin System Design Examples 235. The design of cold-formed steel purlins is based on Eurocode 3 Part 13.
Stratco purlins are manufactured from hi-tensile zinc coated steel complying with AS1397 with a minimum yield stress of 450MPa and Z350 gm ² coating mass. New era university department of civil engineering part 6 analysis and design of purlins w calculation of cc wind loads for low-rise buildings using the building data from part 3 design the required size of purlins to be placed on top of trusses spaced at 35m. Compress a pdf file with free or professional tools For purlin design purposes within the scope of this manual.
Pdf version is provided in this report in the. American Iron and Steel Institute. 2turn to the design capacity tables for the preferred span configuration 3select a suitable purlin from the outward design capacity page always the left-hand opening 4check for inward capacity and deflection on the.
Either 4 of least horizontal dimension or 3 ft 09 m. 10 percent of least horizontal dimension or 04h whichever is smaller but not less than. A load factor of 1 for strength design has already been integrated into the design wind speeds specified in the NSCP 2015 maps so the wind load factor for the strength design load combinations has actually.
H e eave height 75m r. The added advantages of this section include a down turned lip for wall fixing and a variable upturned top flange for roof pitches from 5 to 30.
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