This book is included in the Outdoor Survival Basics section.
Chap. I. INTRODUCTION Chap. II. TYPES OF FLEXIBLE PLASTIC SHEETING AVAILABLE Chap. III. PROPERTIES OF POLYTHENE SHEETING General Properties Mechanical Properties Thicknesses Colours Sunshine degradation or weakening Thermal properties of film-covered structures Condensation in film-covered structures Chap. IV. STRUCTURES COVERED WITH PLASTIC FILMS General Points Semi-cylindrical structure Ridge tent structure The Oxfam temporary shelter Chap. V. USE OF PLASTIC SHEETING IN COMBINATION WITH TRADITIONAL CONSTRUCTION MATERIAL Chap. VI. DETAILS OF MANUFACTURERS Chap. VII. APPENDICES 1 - Useful data for water storage 2- Precipitation data 3- Other useful data 4 - A guide to prices of polythene sheeting and accessories
Introduction
This technical guide arises from Oxfam's experience of using considerable quantities of plastic sheeting in disaster situations. It has been prepared to help field staff and others understand the properties of these sheeting materials with a view to successful emergency shelter construction.
Plastic sheetings are now widely used in a variety of structures, with a satisfactory degree of reliability. This is demonstrated by the large areas of greenhouses covered with plastic film to be seen in the UK and elsewhere, and the great number of semi-permanent plastic-clad farm buildings used for farm stock, mushroom growing and storage.
Polythene or, more correctly, polyethylene sheeting is now readily available in many parts of the world in large quantities and various grades and qualities. In addition to its use for shelter, it can be used for storage, tank linings, tarpaulin-type covers, groundsheets, food containers, crop protection, inflated-walled houses, irrigation and soil mulching.
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