IS 4090 -1967 Code Book PDF free download

IS 4090 -1967 Code Book PDF free download


This Indian Standard was adopted by the Indian Standards Institution on 30 March 1967, after the draft finalized by the Criteria for Design of Structures Sectional Committee had been approved by the Civil Engineering Division Council. Reinforced concrete arches, because of their aesthetic appearance and ability to carry heavy loads over large spans, are advantageously used in bridges, monumental buildings, assembly or exhibition halls and similar other structures. The use of reinforced concrete allows much greater freedom in the choice of arch curve and very large spans are possible even with heavy loads without the necessity of fitting the arch curve to the pressure curve. However, the design of an economical arch has always been a rather lengthy process involving several sets of calculations and in this dastard an attempt has been made to give general recommendations for guidance in the design of reinforced concrete arches. Certain essential features of construction which have a bearing on the design have also been briefly covered. The provisions laid down in the standard are for the general guidance for designers and are applicable to reinforced concrete arches of spans up to 120 m and with rise to span ratio between l/g and l/3. The designers may adopt other suitable methods of design and construction provided there is sufficient evidence by analysis or tests or both to prove the adequacy and safety of the method adopted. It has also been assumed that the design of reinforced concrete arches is entrusted to a qualified engineer and the execution of the work is carried under the directions of an experienced supervisor. This criteria is complementary to IS : 456-1964* and the recommend: sons for usual reinforced concrete construction apply to reinforced concrete arches also. Various formula in 8 and 9 are a few of the formula commonly adopted for the purpose and have been given in this standard as an aid for ready reference but the designer is free to use any other suitable formula. l Code of practice for plain and reinforced concrete ( Cmdr antarctic ).  For the purpose of deciding whether a particular requirement of this standard is complied with, the final value, observed or calculated, expressing the result of a test or analytical be rounded elf in accordance with IS : 2-1930*. The number of significant places retained in the rounded off value should be the same as that of the specified value in this standard.



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