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FAO FISHERIES TECHNICAL PAPER 134 Rev. 1

Fishing boat designs: 2 V-bottom boats of planked and plywood construction

by Øyvind Gulbrandsen Grimstad, Norway
The designations employed and the presentation of material in this publication do not imply the expression of any opinion whatsoever on the part of the Food and Agriculture Organization of the United Nations concerning the legal statusof any country, territory, city or area or of its authorities, or concerning the delimitation of its frontiers or boundaries. M-41 ISBN 92-5-104061-3All rights reserved. No part of this publication may be

reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying or otherwise, without the prior permission of the copyright owner.Applications for such permission, with a statement of the purpose and extent of the reproduction, should be addressed to the Director, Information Division, Food and Agriculture Organization of the United Nations, Viale delle Terme di Caracalla, 00100 Rome, Italy.
Food and Agriculture Organization of the United Nations Rome, 1997 © FAO

PREPARATION OF THIS DOCUMENT
The first edition of V-bottomboats (FAO Fisheries Technical Paper 134 - Fishing boat design: 2) written in 1974 proved to be one of the most popular publications of the Fishing Technology Service (formerly the Fish Production and Marketing Service) of the Fishery Industries Division. This updated and completely revised publication follows an exhaustive study by the author in collaboration with research institutions andengineers on structural timber design applied to wooden boat construction. The designs included are appropriate for inshore and coastal fisheries and emphasis has been placed on relative ease of construction and minimum wastage of timber. Distribution: FAO Regional Offices Selected FAO Fisheries Projects Selected Naval Architects and Boatbuilders Gulbrandsen, O. Fishing boat designs: 2. V-bottom boatsof planked and plywood construction. FAO Fisheries Technical Paper, No. 134, Rev. 1. Rome, FAO. 1997. 64p. ABSTRACT
Timber remains the most common material for the construction of boats under 15 metres in length. There has been a change towards Fibre Reinforced Plastic in most developed countries and some developing countries, but in Africa, Asia and the Pacific, probably more than 90% of smallfishing vessels are built of wood. The cost advantage of timber versus other materials is still sufficient to ensure that it will remain the dominant boatbuilding material for a long time to come in developing countries. However, unrestricted or illicit access to forest resources and the introduction of rational forestry management policies have caused and will continue to cause a scarcity of thesections of timbers traditionally favoured by boatbuilders. The resultant scarcity and high cost of good quality timber have not meant that less wooden boats are being built, but rather that vessel quality has deteriorated through the use of inferior timber and inadequate design strength.

This publication includes the designs of 4 small fishing vessels (5.2 to 8.5 metres), comprehensive materialspecifications and lists, and provides very comprehensive instructions for their construction, both planked and of plywood.

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CONTENTS
INTRODUCTION DESIGNS Boats in this publication 5.2 m boat 6.3 m boat 7.4 m boat 8.5 m boat FRAMES Frame dimensions Drawing frames in full size Modifying the beam SCANTLINGS PLANKED CONSTRUCTION Materials Transom Frames Stem Building jig Fixing frames to building jig Fairing for hog Hog Bevelling of sides Cutout for chine...