K. S. Pruthi , A. N. Bajaj

Abstract

Techniques of nail-jointed timber structures are now well-known for their role In promoting the utilization of short length small dimensioned stocks of timbers, simplicity of fabrication and economy in construction costs. In the present work on nailed joints an attempt bas been made to detrmine the relationship through actual laboratory tests, between strength of 5 mm dia 150 mm long common wire nails under fOllr different condition, of member thicknesses (double shear and quadruple shear joints) in Padauk (Pterocarpus dalbergioides) and two types of araln loadings. The data obtained may be applied in design problems of nail-jointed units for determining multiple shear strength of nails when their double sbear strengtb is known and vice versa for temporary and permanent type of constructions.

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K. S. Pruthi , R. K. Punhani Harbax Singh , A. N. Bajaj

Abstract

The utility of nail as an effective fastener is particularly notable in modern timber engineering techniques. Nail-jointed timber construction, besides being simpler and economical has potentialities in enhancing the use of short length small dimensioned stocks of varied species consistent with the National objectives of efficient resources utilisation. As a pre-requisite to the successful design, the scientific study of the behaviour of nailed joints in timber structures has been extensively undertaken in this country. As a part of this research work the lateral nail strength properties of 5 mm dia nails in different species of timber have been determined. These values contained in this paper would enable the designers to determine exact economic sections of various structural members for roofs, beams and column supports etc. methodology followed in arriving at safe loads is also described in this paper.

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N. J. Masani , A. N. Bajaj

Abstract

In the Development Plans of a country, roads play an important role, because in the present age of vehicular traffic these are the major as well as cheaper means of communication. Bridges are an essential prerequisite to roads as they are required to span small as well as large gaps. In rural areas where local timber is readily available, timber bridges can economically be used over nullahs and streams of small spans where heavy vehicular traffic is restricted to about 10-ton road rollers. As timber has a satisfactory salvage value it can be re-used in case the bridge is abandoned due to detour and other reasons.

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N. J. Masani , A. N. Bajaj

Abstract

No abstract

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N. J. Masani , A. N. Bajaj , D. K. Govil

Abstract

no abstract

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N. J. Masani , A. N. Bajaj , B. C. Dhamani

Abstract

One of the main objectives of the Timber Engineering Branch, Forest Research Institute, as laid down by Governmpnt of India in 1953 when the Branch was set up, is to prepare standard designs of timber bridges for field use by engineers, architects, builders, foresters and public at large. With this consideration in view it was decided to bring out a series of such standard designs to be published in various popular technical journals and the Indian Forester Accordingly, Series I and Series II have already been published and the present Series III is a further link in the chain. Experience shows that usually technical papers contain compacated design calculations involving higher mathematics and thus making practical construction rather intriguing. In order, therefore, to produce the text in a practical form, detailed calculations, etc., have been ellminated in these series so that useful construction hints and self-explanatory drawing plates are only presented. This enables even a subordinate engineer, to get the structure fabricated and erected with the help of available local artisans on the basis of these stock designs. These designs are also helpful to Government organisations and private enterprises having a skeleton of engineering staff and who are independcent of the P.W.D. or similar constructional agencies. Forest Officers who are their own engineers can also make the best use of these stock designs for practical implementation.

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