2560 Chapter 22 



MAN-HOUR REQUIREMENTS FOR STRUCTURAL COMMODITIES 



Man-hours needed to extract, manufacture, and transport a ton of wood-based 

 commodities to the building site varied from a low of 8.37 for medium-density 

 fiberboard to a high of 19.52 for wet-formed hardboard (table 22-3). Oak 

 flooring and hardwood decorative plywood required about 15 man-hours per 

 ton. The high labor input into wet-formed hardboard is in part attributable to 

 prefinishing operations usual for this product. 



Table 22-3 — Man-hours needed to extract, manufacture, and transport to building site — 

 selected primary commodities (Boyd et al. 1977)' 



Commodities 



Logging Transport 



or (mill to 



extrac- Manu- bldg. 



tion facture site) Total 



Wood-based commodities 



Medium-density fiberboard 



Underlayment particleboard 



Softwood lumber 



Structural flakeboard 



Lumber laminated from veneer 



Insulation board 



Softwood sheathing plywood 



Hardwood plywood 



Oak flooring 



Wet-formed hardboard 



Total 



Percent of total 



Mean 



Nonwood-based commodities 



Gravel 



Concrete slab 



Concrete block 



Gypsum board 



Clay brick 



Liquid asphalt 



Asphalt shingles 



Tar paper 



Vermiculite 



Steel nails 



Steel studs 



Steel joists 



Glass fiber 



Aluminum siding 



Carpet and pad 



Plastic vapor barrier 



Total 



Percent of total 



Mean 



'Man-hour requirements for erection of structure are not included 



