इंटरनेट मानक Disclosure to Promote the Right To Information Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public. “जान1 का अ+धकार, जी1 का अ+धकार” “प0रा1 को छोड न’ 5 तरफ” Mazdoor Kisan Shakti Sangathan Jawaharlal Nehru “The Right to Information, The Right to Live” “Step Out From the Old to the New” SP 38 (1987): Handbook of Typified Designs for Structures with Steel Roof Trusses (With and Without Cranes) (Based on IS Codes) [CED 12: Functional Requirements in Buildings] “!ान $ एक न’ भारत का +नम-ण” Satyanarayan Gangaram Pitroda ““IInnvveenntt aa NNeeww IInnddiiaa UUssiinngg KKnnoowwlleeddggee”” “!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता हहहहै””ै” Bhartṛhari—Nītiśatakam “Knowledge is such a treasure which cannot be stolen” HANDBOOK OF TYPIFIEDD ESIGNSF OR STRUCNRES WITH STEEL ROOF TRUSSES (WITH AND WITHOUT CRANES) (BASED ON IS CODES) BUREAU OF INDIAN STANDARDS MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG NEW DELH I 110002 SP : 38(S&T)-1987 DEHSILBUPTSRIF HCRAM 9891 TSRIF TNIRPER REBMECED 5001 DNOCES TNIRPER ifEBMECED s91'1 0 UAERJLB NAIDNI SDRADNATS OF CDU : )120(3.633.270.426 NBSI : 4.120-1607-18 PRICE : Rs 650.00 DE‘INIKP IN INDIA Al- hUTAN PRINTEKS. I--89/12. OKIHLA INDL. AKtA. I’! lASE 1.N EW l>I:l.l !I- 1 10020 AND PUBLISHED KY WREAIJ OF INDIAN STANDAKDS. Nl .VI’ 1 11_I I II 1 10002 SPECIAL COMMITTEE FOR IMPLEMENTATION OF SCIENCE AND TECHNOLOGY PROJECTS (SUP) CHAIRMAN DR H. C. VISVESVARAYA National Council for Cement and Building Materials New Delhi MEMBERS REPRESENTING DR M. RAMAIAH StrM”,‘d”,H”,E’ ngineering Research Centre (CSIR), DR R. K. BHANDARI Central Building Research Institute (CSIR), Roorkee SHRI V. RAO AIYAGARI Department of Science and ‘Technology, New Delhi SHRI T. S. RATNAM Bureau of Public Enterprises, New Delhi SHRI P. K. KALRA (Alternate) SHRI HARISH CHANDRA Central Public Works Department, New Delhi SHRI A. K. BANERJEE Metallurgical and Engineering Consultants (India) Ltd, Ranchi SHRI J. D. CHATURVEDI Planning Commission, New Delhi SHRI G. RAMAN, Bureau of Indian Standards, Yew Delhi (Member Secretary) Working Group for Project B-8 CONVENER DR H. C. VISVESVARAYA National Council for Cement and Building Materials, New Delhi MEMBERS REPRESENTING SHRI HARISH CHANDRA Central Public Works Department, New Delhi SHRI S. R. KLJLKARNI M. N. Dastur & Co Pvt Ltd. Calcutta SHRI J. C. GANGULY Braithwaite Burn & Jessop Construction Co Ltd, Calcutta DR P. SRINIVASA RAO Indian Institute of Technology, Madras PROF (DR) L. N. RAMAW;RTH~ (Ahernate) SHRI A. K. BANERJEE Metallurgical and Engineering Consultants (India) Ltd, Ranchi SHRI P. V. NAIK Richardson & Cruddas Ltd, Bombay DR M. RAMAIAH Structural Engineering Research Centre (CSIR), Madras SHRI C. N. SRINIVASAN C. R. Narayana Rao Architects & Engineers, Madras SHRI A. RAMAKRISHNA Engineering Construction Corporation Ltd. Madras SHRI S. SUBRAMANIAM (Alternare) SHRI ASHOK TREHAN NationaI Thermal Power Corporation Ltd, New Delhi SHRI A. C. GUPTA (Alternare) . . . III As in the Original Standard, this Page is Intentionally Left Blank 0. FOREWORD The Department of Science and Technology set up an Expert Group on Housing and Construction Technology in 1972. This Group carried out in depth studies in various areas of civil engineering and construction practices followed in the country. During the pre aration of the Fifth Five-Year Plan in 1975, the Group was assigned the task o P producing a Science and Technology Plan for research, development and extension work in the sector of housing and construction technology. As a result of this and on the recommendation of the Department of Science and Technology, the Planning Commission approved the following two projects which were assigned to the Bureau of Indian Standards (BlS): a) Project B-7 - Development Programme on Code Implementation for Building and Civil Engineering Construction; and b) Project B-8 -Typification of Industrial Structures. BIS has set up a special committee (SCIP) consisting of experts to advise and monitor the execution of these projects. A Working Group for Prqject B-8 overseas the work of the project. In a developing country like India, the capital outlay under each Five-Year Plan towards setting up of industries and consequently construction of industrial buildings is very high. It is, therefore, necessary that the various parameters of industrial buildings be standardized on broad norms so that it will be feasible to easily adopt prefabricated members, particularly where repetitive structures could be used. The standardization of parameters for industries by itself will be, no doubt, a difficult task as it will not be possible to specify the requirements of each industry. The layout including height will vary from industry to industry, for it depends on the process of manufacture and end products. However, a little more detailed analysis of the requirements indicates that the problem may not be as difficult as it appears. Although it would not be possible to specify any constraint on the parameters, a broad norm can be given within which most industries could be accommodated. The object of the project B-8 is to typify at national level the common forms of industrial structures used in light engineering industries, warehouses, workshops and storage sheds, and to obtain economical designs under these conditions. Even if an industrial comple x is-classified as heavy industry. it need not necessarily mean that all the industrial structures coming within the complex should be heavy industrial structures and that many structures could be from the typified design. The main objective of typification of industrial structures is to reduce the variety to the minimum and provide standard prefabricated designs so that the structures could be easily mass produced and made available to the user almost off the shelf. In doing so, there will be tremendous saving in time in putting up an industry into production and hence increased production. This would indirectly increase the overall economy of the country. This would also help in the orderly use of source materials like steel and cement. This would be of immense use to structural engineers as well, since it would relieve them, to a large extent, from the routine and repetitive calculations. Thus the engineers time could be used to look at more innovative and economical alternatives. The project on typification of industrial structures involved the following three main tasks prior to preparation of typified designs: a) Task 1 - Survey and classification of industrial structures into different types; b) Task II - Identification of industrial structures repeated a large number of times in the country, which are amenable to typification from the classified list prepared during Task 1; and c) Task III -- Specifying the elements of the industrial structures to be typified taking into consideration a number of parameters, such as structures with cranes and without cranes, span, iength, height, support conditions, slope of roof, wind and earthquake forces, spacing, field and shop connections, material (steel, reinforced concrete). etc. The data regarding physical parameters like span, spacing, roof slope, column heights, crane loading, etc, of existing structures has been obtained from several public sector enterprises through Bureau of Public Enterprises (BPE). Some information from private industries has also been collected by BIS. The typified design for the following types of industrial structures in steel and reinforced concrete is envisaged to be brought out based on appropriate Indian Standards: a) Steel Structures I) Structures with steel roof trusses (with and without cranes) 2) Structures with steel kneebraced trusses (without cranes) 3) Structures with steel portal frames (without cranes) (SP : 40)* 4) Structures with steel portal frames (with cranes) 5) Structures with steel !attice frames (without cranes) b) Reirzfotwd Concrete Structures 1) Structures with RCC roof trusses (with and without cranes) 2) Structures with RCC portal frames (without cranes) 3) Structures with RCC portal frames (with cranes) In each case of structures with cranes, the maximum capacity of crane considered is limited to 20 tonnes. normal range in light industries. This Handbook deals’with tvpification of structures with steel roof trusses (with and without cranes) having A-type as well as lean-to roof type trusses supported on columns. In structures with cranes, crane columns are build-up cantilever columns to resist wind and transverse crane loads. The roof trusses which are the same for buidlings with and without cranes have been designed both as angle trusses and tubular trusses. Some of the points to be noted regarding analysis and design of these structures are as follows: a) Typified design have been given for the following parameters: Span lengths (metres): A-type = 9, 12, 18, 24 and 30 lean-to roof = 9, 12 and 15 Spacing of trusses (metres) = 4.5 and 6.0 Roof slopes = 1 in 3, 1 in 4 and 1 in 5 Span Colunlrl Height (m) n (m) f A-Type Truss Lean-to Roof Truss’ 9.0 4.5. 6.0 4.5. 6.0 12.0 4.5, 6.0. 9.0 4.5, 6.0. 9.0 15.0 4.5, 6.0. 9.0 - 18.0 6.0, 92, 12.0 24.0 9.0, 12.0 - 30.0 9.0. 12.0 - Crane column height (metres) = 4.5 and 6.0 Crane capacities (tonnes) = 5, 7.5, 10 and 20 Minimum clear head room (metres) = 3.0 Minimum side clearance (metres) = 0.5 Wind zones (see IS : 875-1964) = I, II and III Earthquake zones (see IS : 1983-1984) = I, II, III, IV and V *Printed. vi