Reaffirmed 2019

National Foreword

This Indian Standard (First Revision) which is identical with ISO 9519 : 1990 'Shipbuilding and marine structures - Rungs for dog-step ladders' issued by the International Organization for Standardization (ISO) was adopted by the Bureau of Indian Standards on the recommendation of the Shipbuilding Sectional Committee and approval of the Transport Engineering Division Council.

This standard was first published in 1977. The present revision was taken up to harmonize it with current international practices. In the revised standard, rungs for dog-step ladders for ship’s masts have been included.

The text of ISO Standard has been approved as suitable for publication as an Indian Standard without deviations. Certain conventions are, however, not identical to those used in Indian Standards. Attention is particularly drawn to the following:

a) Wherever the words 'International Standard' appear referring to this standard, they should be read as 'Indian Standard'.

b) Comma (,) has been used as a decimal marker in the International Standard while in Indian Standards, the current practice is to use a point (.) as the decimal marker.