XII CONTENTS 



CHAPTER IV.— Continued Pa se 



Potential supplies of tropical woods 137 



Potential timber supplies from tropical and subtropical plantations. _ 138 



Potential timber supplies from the USSR 138 



A summary of prospective trends in U.S. timber imports and exports. 139 



CHAPTER V. DEMAND FOR TIMBER PRODUCTS 142 



Basic assumptions 143 



Population assumptions 143 



Gross national product assumptions 144 



Technological and institutional assumptions 146 



Price assumptions 147 



Effects of price increases on timber demands 149 



Demand for timber products in new housing 150 



Household formation 150 



Housing replacements 152 



Vacancies 154 



Total demand for new housing 155 



Demand for new housing by type of unit 157 



Conversions 157 



Timber products use per dwelling unit 157 



Projected demand for timber products in new housing 159 



Demand for timber products in residential upkeep and improve- 

 ments 160 



Expenditures for residential upkeep and improvements 160 



Timber products use and projected demand 160 



Demand for timber products in new nonresidential construction 161 



Nonresidential construction expenditures 161 



Timber products use in nonresidential construction 161 



Timber products use per dollar of construction expenditure 162 



Projected demand for timber products in new nonresidential 



construction 167 



Demand for timber products in railroad construction 167 



Demand for timber products in manufacturing 167 



Timber products use in manufacturing 167 



Shipments of manufactured products 168 



Timber products use per dollar of shipments 170 



Projected demand for timber products in manufacturing 174 



Demand for timber products in shipping 174 



Demand for timber products in pallets 174 



Demand for timber products in wooden containers 177 



Demand for timber products in dunnage 177 



Projected demand for timber products in shipping 177 



Demand for timber products in miscellaneous uses 177 



Summary of demand projections for lumber, plywood, and building 



board 179 



Lumber consumption and demand 179 



Plywood consumption and demand 182 



Building board consumption and demand 186 



Demand for pulpwood 188 



Demand for paper and board 188 



Demand for fibrous material for paper and board manufacture. _ 194 



Pulpwood consumption and demand 198 



Demand for miscellaneous timber products 201 



Cooperage logs and bolts 203 



Poles and piling 203 



Fence posts 203 



Other industrial wood 203 



Demand for fuelwood 203 



Log exports and imports 204 



