[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-650156-105":59,"doc-detail-650156-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","trusses-chapter-27-introduction","TRUSSES - Chapter 27 - Introduction","","Trusses are introduced as triangular frame systems whose members carry essentially axial forces under externally applied loads. The text distinguishes plane trusses and space trusses, explaining their efficiency in axial loading and common uses in spanning long lengths. It reviews typical applications across roofs, floors, bridges, and lateral stability systems, then outlines the load categories on trusses for industrial buildings, including dead, live, wind, and earthquake effects, with reference design standards.",{"@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/trusses-chapter-27-introduction/650156/",{"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/trusses-chapter-27-introduction/650156.png","ImageObject",300,407,{"name":92,"@type":93},"RuangKosong","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-30","2026-10-24",true,{"@type":102,"interactionType":103,"userInteractionCount":24},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What are trusses and why are they efficient under external loads?","Question",{"text":112,"@type":113},"Trusses are triangular frame systems where members are subjected mainly to axial forces. Steel members in axial action are generally more efficient than members in flexure because the stress distribution is nearly uniform.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"What load types affect trusses in industrial buildings?",{"text":117,"@type":113},"Industrial roof trusses are subjected to dead loads (claddings, purlins, self-weight, bracings and special dead loads), live loads (erection, servicing, dust and other special live loads), wind loads (often uplift opposing gravity), and earthquake loads depending on building mass and standards.",{"name":119,"@type":110,"acceptedAnswer":120},"How do bridge trusses differ between through type and deck type?",{"text":121,"@type":113},"In through-type bridges, the carriageway is supported at the bottom chord of the trusses, while in deck-type bridges it is supported at the top chord. In both cases, the structural framing transfers carriageway loads to the nodal points of vertical trusses.","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},650156,1792919293,{"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":24,"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},962090883219,"https://ap-avatar.wpscdn.com/davatar_276721f389ce27ea32af1340a28f341c","27  \nTRUSSES  \n1.0 INTRODUCTION  \nTrusses are triangular frame works in which the members are subjected to essentially axial forces due to externally applied load. They may be plane trusses [Fig. 1(a)], wherein the external load and the members lie in the same plane or space trusses [Fig. 1(b)], in which members are oriented in three dimensions in space and loads may also act in any direction. Trusses are frequently used to span long lengths in the place of solid web girders and such trusses are also referred to as lattice girders.  \n(a) Plane Truss  \nFig. 1 Types of Trusses  \nSteel members subjected to axial forces are generally more efficient than members in flexure since the cross section is nearly uniformly stressed. Trusses, consisting of essentially axially loaded members, thus are very efficient in resisting external loads. They are extensively used, especially to span large gaps. Since truss systems consume relatively less material and more labour to fabricate, compared to other systems, they are particularly suited in the Indian context.  \n© Copyright reserved  \nTrusses are used in roofs of single storey industrial buildings, long span floors and roofs of multistory buildings, to resist gravity loads [Figs. 1(a) and 1(b)] . Trusses are also used in multi-storey buildings and walls and horizontal planes of industrial buildings to resist lateral loads and give lateral stability [Figs. 1(c) and 1(d)] . Trusses are used in long span bridges to carry gravity loads and lateral loads [Fig. 1(e)] .  \nTrusses often serve the action of the girder in transferring the gravity load over larger span, and are referred to also as lattice girders. Such lattice girders are usually deeper and much lighter than regular girders and hence are economical, particularly when repetitive fabrication is taken advantage of. These are used as flooring support systems in multi-storey buildings, within which depth all the ducts can be easily accommodated without increasing the depth of the ceiling.  \nSteel trusses can also be efficiently used along with concrete slabs in buildings and bridges by mobilising composite action between structural steel and concrete. In this chapter, initially, the details of structural steel trusses are discussed. Subsequently, the behaviour and design of structural steel-concrete composite trusses are discussed.  \n2.0 LOADS  \nThe loads on trusses would depend upon the application for which the trusses are used. The loads may be static, as in the case of buildings, or dynamic, as in the case of bridges. These are briefly reviewed below.  \n2.1 Industrial Buildings  \nThe roof trusses in industrial buildings are subjected to the following loads:  \n2.1.1 Dead load  \nDead load on the roof trusses in single storey industrial buildings consists of dead load of claddings and dead load of purlins, self weight of the trusses in addition to the weight of bracings etc. Further, additional special dead loads such as truss supported hoist dead loads, special ducting and ventilator weight etc. could contribute to roof truss dead loads. As the clear span length (column free span length) increases, the self weight of the moment resisting gable frame increases drastically. In such cases roof trusses are more economical.  \n2.1.2 Live load  \nThe live load on roof trusses consist of the gravitational load due to erection and servicing as well as dust load etc. and the intensity is taken as per IS:875-1975. Additional special live loads such as snow loads in very cold climates, crane live loads in trusses supporting monorails may have to be considered.  \n2.1.3 Wind load  \nWind load on the roof trusses, unless the roof slope is too high, would be usually uplift force perpendicular to the roof, due to suction effect of the wind blowing over the roof. Hence the wind load on roof truss usually acts opposite to the gravity load, and its magnitude can be larger than gravity loads, causing reversal of forces in truss members.  \nThe horizontal and ve","cbCaigcQKcGHRoRF","https://ap.wps.com/l/cbCaigcQKcGHRoRF","pdf",1238995,44,"English","# 1.0 Introduction\n## Truss types and applications\n## Efficiency and composite steel-concrete action\n# 2.0 Loads\n## Industrial buildings: dead, live, wind, earthquake loads\n## Multi-storey buildings bracing concept\n## Bridge trusses: through vs deck type\n# 3.0 Analysis of trusses","[{\"question\":\"What are trusses and why are they efficient under external loads?\",\"answer\":\"Trusses are triangular frame systems where members are subjected mainly to axial forces. Steel members in axial action are generally more efficient than members in flexure because the stress distribution is nearly uniform.\"},{\"question\":\"What load types affect trusses in industrial buildings?\",\"answer\":\"Industrial roof trusses are subjected to dead loads (claddings, purlins, self-weight, bracings and special dead loads), live loads (erection, servicing, dust and other special live loads), wind loads (often uplift opposing gravity), and earthquake loads depending on building mass and standards.\"},{\"question\":\"How do bridge trusses differ between through type and deck type?\",\"answer\":\"In through-type bridges, the carriageway is supported at the bottom chord of the trusses, while in deck-type bridges it is supported at the top chord. In both cases, the structural framing transfers carriageway loads to the nodal points of vertical trusses.\"}]","TRUSSES - Chapter 27 - Introduction | PDF",1792819870,111]