Economic Feasibility Analyses 



1.0 TON 

 ROUGH LOGS 

 (O.D. WEIGHT) 



3543 



RESIN 

 .02 



FLAKEBOARD 

 0.25 



.003 RESIN 



.463 I-BEAM 



►■26] CORES a 



► 04] SPIN-OUTS 



► 0= FLAKE, CHIPS 

 ■'^^ a SAWDUST 



BARK a 



TOTAL 1.273 TON 



.30 TON 

 CORES 



(O.D. WEIGHT) 



-►.19 PALLET CANTS 



II TONS 



FUEL 



TOTAL .30 TON 



Figure 28-26. — (Top) Raw materials balance for structural I-beams from parallel-lami- 

 nated hickory veneer flanges and mixed hardwood flakeboard webs. (Bottom) Raw 

 materials balance for pallet cants from veneer cores and spinouts. All values are 

 based on ovendry (OD) weight. (Drawing after Woodson 1981.) 



lumber width. (See figure 22-63 and tables 22-27 and 22-28 with related 

 discussion.) 



About 11.5 billion cubic feet of low- to medium-density hardwood timber, 

 mainly yellow-poplar, sweetgum and red maple, suitable for production of 

 structural lumber, is estimated to be available from southern pine sites. Use of 

 the SDR system to minimize warping permits recovery of about 44 percent of a 

 sawmill's throughput of these species as structural lumber (fig. 28-27). Process- 

 ing cost (excluding wood cost, taxes, and profits) should be about $67/thousand 

 board feet. Residues, in excess of those used for fuel in kiln-drying, are estimat- 

 ed to be about 0.485 ovendry ton of wood chips, 0. 182 ovendry ton of planer 

 shavings and sawdust, and 0.45 ovendry ton of hogged fuel per thousand board 

 feet of lumber produced. Although investment costs for an efficiently sized new 

 mill are estimated to be about 12 million dollars (1980 basis), an already existing 

 sawmill could probably adopt the SDR system with negligible new costs. 



