Small sawmill improvement

'--- -/ 4$ yr' 4' L
-' _>' 4.. ; ...;.*. --' FOr,P ST PRODUCTS LABORAT ,' ,* FOREST RVI(
'U. S. DEPAI: 1MENT OF AGRICULTURE

S '| LL SAWMILL IMPROVF,'MENT
SPR CTICAL POINTERS TO FIELD AGENCIES
[ ~I' -.-. G T>"3 -..'CK-IJDI',Y :Ce'::.x

Sapi "tined Lirmbur loses markets in co!petition bri ".t lmr.
Smal mills i:rve been .o.;in thele market: because e :.:all -)r-uction h no:
warrant i the instalaticn of large b ilers:, niIn ',or dippin. vt" effective
in tainn cc-' 1 -Th recent workof ,he Divi-'io of- ForeI Patol B-
reau of Plant Indu:try, at the Southern ForeSt Ex eriment Sttin, fro:." wtom
further infer. tion cn be obtained on cold jis:, has o ended to the :maI
mills an op ortunity to )put cut bright lber, ibr. dveloo.ment pry-cticly
means that the sall mill:: will either hive to d-1-n or disc ntin:ue cuttl
st'in-sus.ce--tible timber ao.e )rogrec'-ive c -.,ntration yards are b yi.n
only dipped l1 ber and every mill dippin- h-.' : ne time ,when the c2nC'.25er
can co)letely fill his req'-iremo:nt from i n.. iu' d lumber.

T1e follow".: recommrendation:-, a' ,uo:n. and -ayout f, far dip-
ping at ti.c portable t:y centr'.tion yrd is.c" ,ciced. Dipnin_ i: done after the fi?.l :"- ?,2.)
Tr'- tail I cr:aa-n r'lide, tne lut.betr into thc dip over rlz--r That 'i : t-
t-ch..d at n :n mne height a" th top of the edger table to th end ..-
narrow ta nk ontainin thf, dip. Tie lev.i l of mhe dip i: 1-nt 'bout 4 incIhc.'
from tic to- o- f Th, t-nic, that is, 24 inchn : front tne o:und. tnh "-'..... i:
remowvd. from te tink imx.iediant ly by one main who lifts 0on of l 'd
out of the tank, pivots t1he boa-rd on a roller alongside the ta.ku... a
instant to expedite drip-inr ,and then slide:, the board ove r i-other roll er
Sto a scaffold. T"i ",a .'h
to a scaffold. The scaffold s:poort- hold the lm,,ber nii-n en ou.h for a
truck to be backed underneath. (Fig. 1) Block: o re :o fitted to the high
end of the scaffold smomorts that they c' n be K:ocked out thus brinai.-- one
end of the lumber pile down into the truck. ni, truck is then started and
the other end of tne lui:ber pii -oullcd entirely free of the scaffold ..
whole operation reoquiros the service: of nly one mn beyond thei tail ei Ir-
man and the use of about 15 llons of liquid to .ac0 t .,.nd board feet of
lumber dipped. ",,...r rchandling is pr'ctic,.d, s.-ch as y piling direct from th. saw into box cars-, the l!Ib r is placed on aollie:-
instead of ca:.ffolds:.

:.' aterialc are 8/4-inch D t tor e:i dc
one plank 16 inches by 17 feet for t .. end oieces or
narrower pl ;;: vick-ing c' ..-d at jo nU L, t.'3 ..... 7,:o 4 b 4-
inch by 17-foot braces held in place by 1-inch rods claimed t th.e e-nd: rein-
force the rides, and strips ] by 4 i che no, b 1,6 ;Q1'led o the t'p ed f
the side minimize splash waste. (F 4) IT"' n fe< t 1cr.:, 2 mauo.
wide at the top, 12 inches vwide at ]it t t bottom, a 16 inch d.-.p. A tight
tarnk: i, attained by bevelling tne ci : at conta-ct with the otto::., i nd eni
or grooving sli-htly, rD,.c'in; the gro .: : tv, side
boards 3/8-iach deep for ^ni ndc i- . ... ..s a.- junction
with sides and bottom, lnd fa tcnin tog" tier with 1 scres. (Fig. 4) e
scaffold dimensi.n' aply .'here 1-1/2 ton tracks re ,-, but the blocking
shown in Figure 3 can be Increa:ed or dccrcased lo : oit othe r truck fie *i .
., -6 *Contributed by C.J. elford,
S;ll-L.ill Spec-acmlit,
Forst Pr uct orary ,
t Maintained at Madison, Wisconsin in cooperation wilh the University of Wisco sin.D c x r 1
See outline in Small Sawmill Improvement Working P, March 1 ).,0. (or explaI i, on of indexi g 'yste i propo4d















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FIG, 1- SOIDE VIEW OF TANK AND SCAFFOLD


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+fLIL FLOOR


FIG.2-TOP VIEW OF TANK AND SCAFFOLD


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FIG. 3- ,CAFFOLD DETAILF


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FI6.4-TAIVK DETAIL.




UNIVERSITY OF FLUORIUA

3 1262 09216 2857I II
3 1262 09216 2857