[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-650158-105":59,"doc-detail-650158-en":130},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":123,"head_meta":125,"extra_data":127,"updated_unix":129},105,"en","code-provisions-design-of-steel-roof-truss-example-design-a-steel-roof-truss","Code Provisions Design Of Steel Roof Truss - Example - Design A Steel Roof Truss","","Code Provisions Design Of Steel Roof Truss Example provides step-by-step structural design calculations for a steel roof truss using pan type roof cover, galvanization corrugated sheeting (GC) and rolled steel angles. It determines truss geometry, dead, live and wind loads, then designs purlins and verifies section classification, shear, and moment capacity using IS 800:2007. Member design checks compressive and tensile forces, buckling parameters, and tension strength via rupture, yielding, and block shear, concluding with governing design strengths for each truss component.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":40,"@type":76,"position":81},"https://docshare.wps.com/document/research-report/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/code-provisions-design-of-steel-roof-truss-example-design-a-steel-roof-truss/650158/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/code-provisions-design-of-steel-roof-truss-example-design-a-steel-roof-truss/650158.png","ImageObject",300,407,{"name":92,"@type":93},"mieayamfan","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-30","2026-10-24",true,{"@type":102,"interactionType":103,"userInteractionCount":29},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"How are the truss dimensions and central rise determined?","Question",{"text":112,"@type":113},"The central rise is taken as span/4. For a 12 m span, the central rise is 3 m.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"What loads are considered in the truss design and how are they computed?",{"text":117,"@type":113},"Dead loads include self-weight of GC sheeting, purlins, and truss self-weight; live loads are calculated from the given expression and distributed to purlins; wind loads use (Cpe − Cpi)A pd with Cpe and Cpi values, then converted to maximum wind load per purlin.",{"name":119,"@type":110,"acceptedAnswer":120},"How is the purlin section checked for strength and capacity?",{"text":121,"@type":113},"The design checks section classification using (b/t), shear capacity using Av and fy per the stated clause, and moment capacity using Zx and fy with partial factors. The computed capacities are compared with the factored bending moment and shear.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},650158,1792900329,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":39,"category_name":40,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":29,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":139,"language":140,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":67,"update_tm":144,"read_time":145},962090893677,"https://ap-avatar.wpscdn.com/davatar_3d24733baf745e90a7e4bdd5f77d97b2","4.4 Code Provisions Design Of Steel Roof Truss  \nExample:5  \nDesign a steel roof truss to suit the following data,  \nSpan of the truss Type of truss Roof cover  \nMaterials  \n= 12m  \n= pan type  \n= Galvanization corrugated (GC) sheeting = Rolled steel angles  \nSpacing of roof truss = 5 m  \nWind pressure =1KN/m^2  \nDraw the elevation of the roof truss and the details of joints.  \nSolution:  \nStep:1 Dimension of truss  \nCentral rise = span/4  \n=12/4  \n= 3m  \nPurlins are provided at intervals of 1.863m on the principal rafter  \nStep:2 Dead loads  \nSelf weight of GC sheeting per purlin at 0.18KN/m^2  \n= 0.18 x 1.863  \n= 0.335 KNm  \nSelf weight of purlin at 0.1KN/m  \n= 0.10 KN/m  \nTotal dead load = 0.435KN/m  \nStep:3 Live loads  \nSlope of the truss = 26֯ 34 `  \nLive load of the truss  \n= 0.75 –(10x0.01 + 6.5x0.02)  \n= 0.52 KN/m^2  \nLive load per purlin per metre  \n= 0. 52x1 . 836xcos 26 ֯ 34 `  \n= 0. 87KN  \nStep:4 Wind loads  \nF = ( Cpe – Cpi )A pd  \nCpe = external pressure coefficient  \nCpi = internal pressure coefficient  \nA = Surface area of structural element or cladding unit  \npd = design wind pressure  \nSlopping angle ,  \nӨ = 26֯ 34 `  \nCpe = -0.7  \nCpi = 0.2  \nF = (-0.7 – 0.2)pd  \n= -0.9 pd  \n=-0.9x1  \n= -0.9 Kn/m^2  \nMaximum wind load per purlin per metre  \n= (-0.9x1.863xcos26֯ 34`)  \n= 1.5 KN  \nStep:5 Design of purlin  \nFor continuous purlin, the max factored bending moment and shear force  \nare computed as follow,  \nM = (1.5x1.305x5^2)/10  \n= 4.89 KNm  \nV = (1.5x1.305x5)/2  \n= 4.9 KN  \nAdopt ISA 100x75x8mm having section properties given below,  \nZx = (4.38x10^4)mm^3  \nD = 100mm  \nb = 75mm  \nt = 8mm  \nIS 800:2007 clause 3.7,  \n(a) Check for section classification is done by computed the rations,  \n(b/t) =75/8  \n= 9.37\u003C9 .4  \nHence the section considered as plastic .  \n(b) Check for shear capacity  \nAv = 100X8  \n= 800mm^2  \nclause 8.4. 1,  \n( Av fy w/√3 γmo) = (800x250)/(√3x1.10x10^3)  \n= 105 KN >4 .9 KN  \nThe shear capacity of the section is very large compared to the applied shear  \nforce.  \n(c) Check for moment capacity  \nMd = (ẞb Zx fy )/γmo  \n= (1x4.38x10^4x250)/(1.1x10^6)  \nMd = 9.95 KNm > 4.89 KNm  \nStep:7 Load on truss  \n(a) Dead load  \nSlopping length of rafter,  \nAD = √(5^2+2.5^2)  \n= 5. 59m  \nSpacing oftrusses = 5m c/c  \nWeight of GC sheeting on half truss ( plan area ) at 0.18 KN/m^2  \n= 5x5x0 .18  \n= 4.5 KN  \nWeight of purlins (4nos) at 0.10 KN/m  \n= 4x0 . 1x5  \n= 2 KN  \nSelf weight of roof truss = (span/300)+0.05  \n= (10/300)+0.05  \n= 0.083 KN/m^2  \nWeight of half roof truss = 0.083 x5 x5  \n= 2.075 KN  \n჻ Total load on half truss = 4. 5+2+2.075  \n= 8.57 KN  \nDead load on intermediate-panel point  \n= 8. 57/3  \n= 2.85 KN  \nDead load on end panel point  \n= 2. 85/2  \n= 1.425 KN  \n(b) Live loads  \nLive load on half truss = 0.52 x5 x 5  \n= 13 KN  \nLive load on intermediate panel point  \n= 13/3  \n= 4.3 KN  \nLive load on end panel point  \n= 4.3/2  \n= 2. 15KN  \n© Wind loads  \nMaximum wind load acting perpendicular to the sloping surface  \n= -0.9x5x5 .59  \n= -25. 155KN  \nWind load on intermediate-panel point  \n= -(25.155/3)  \n= -8.38 KN  \nWind load on end panel point  \n= -(8.38/2)  \n= 4.19 KN  \nStep:8 Design of truss members  \n(a) Members AB, BC, CD  \nMaximum service load compressive force  \n= 36.17 KN  \nMaximum factored compressive force  \n= 1. 5x36 .17  \n= 54.25 KN  \nMaximum service load tensile force  \n= 22.95 KN  \nMaximum factored tensile force  \n= 1. 5x22 .95  \n= 34.42 KN  \nLength (L) = 1.863m  \nEffective length (KL) = 1.304m  \nTry two angle ISA 50x50x6mm placed back to back  \nArea (A) = 1136mm  \nMinimum radius of gyration  \n(γmin) = 15.1mm  \nSlenderness ratio = (KL/γmin)  \n= 1304/15 .1  \n= 86.3 \u003C 180  \nStress reduction factor x for column buckling class (c) corresponding to the  \nslenderness  \nratio 86.3 and fy = 250 N/mm^2  \nx = 0.56  \n჻Design compressive stress is computed as,  \nFcd = x fy/γmo  \n=( 0.56x250)/1.25  \n= 112 N/mm^2  \nDesign compressive force is given by,  \nPd =[A fcd]  \n= (1136x112)/1000  \n= 127 KN ","cbCaigaDm1IDnQvp","https://ap.wps.com/l/cbCaigaDm1IDnQvp","pdf",435581,13,"English","# Example\n## Step:1 Dimension of truss\n## Step:2 Dead loads\n## Step:3 Live loads\n## Step:4 Wind loads\n## Step:5 Design of purlin\n## Step:7 Load on truss\n## Step:8 Design of truss members","[{\"question\":\"How are the truss dimensions and central rise determined?\",\"answer\":\"The central rise is taken as span/4. For a 12 m span, the central rise is 3 m.\"},{\"question\":\"What loads are considered in the truss design and how are they computed?\",\"answer\":\"Dead loads include self-weight of GC sheeting, purlins, and truss self-weight; live loads are calculated from the given expression and distributed to purlins; wind loads use (Cpe − Cpi)A pd with Cpe and Cpi values, then converted to maximum wind load per purlin.\"},{\"question\":\"How is the purlin section checked for strength and capacity?\",\"answer\":\"The design checks section classification using (b/t), shear capacity using Av and fy per the stated clause, and moment capacity using Zx and fy with partial factors. The computed capacities are compared with the factored bending moment and shear.\"}]","Code Provisions Design Of Steel Roof Truss - Example - Design A Steel Roof Truss | PDF",1792819876,33]