ia 14; m-i3 
 
 
 ■ 
 
 FOREST PRODUCTS LABORATORY t FOREST SERVICE 
 U. S. DEPARTMENT OF AGRICULTURE 
 
 
 ♦.4S411 Conveying 
 to pile 
 
 SMALL SAWMILL IMPROVEMENT 
 
 PRACTICAL POINTERS TO FIELD AGENCIES 
 
 me hods c? ic-ASirs- l:l^33 at : : llap. cf ~:- :l mill 
 
 (Second Series) 
 
 Several methods cf loading lumber at the rear of t: . • :•• scribed 
 
 report .4S241 (Mimeo. 3899-16) of thin series. Additional types of lunber- 
 Ioj so f 3] Lb as used in the West are here described, ivormally i ' 
 
 tc 5,000 board feet of predominantly 16-foot stock comprises a load. 
 
 Porta bl e jacks . — Jacks housed ir. portable standards can be used oi:' r 
 to ease the load onto the true!: cr to take it off. Used as a truck-loading 
 scaffold (fig. l) a set of two jacks sup-pert a small lc metal beam at a 
 
 height adequate for bunk clearance as the truck is backed under it. The re 
 ted is inclined downward at the front of the lead so that in a icking between 
 the supporting jacks the rear bunk engages the load and positions it properly 
 with relation tc the cab and bunk". Ehe truck is stopped at this joint, the 
 front i :od down, and the load is settled on the true] without 
 
 shock. Where this equipment is used to remove ET-tcpifi fr. . he truck, 
 jacks are used, two elevating the front su • or 
 
 r no. 
 
 Lever-arm support . — In a lever-am support] :h s "end of the log cross- 
 piece is supported by the end of a plank which/ can bo fulcrumme'd so as to 
 raise or lower the crosspiece slightly (fig. 2). - load, the true': is 
 positioned as described under - ' le jacks , <:•'..• It at a (fig. 3) re- 
 
 moved, and restraining leverage applied to the plank to steady the descent of 
 the front corner as the plank pivots under the weight of the lead. ~ -p 
 
 at b if, bout 5 feet above 3 in a. Che let-down of tae front corner result j . 
 from the plank end travelling from a tc b is not enough to bring the loa.d 
 down o. ie bunko, but after the other front corner is lowered in a ;;imilar 
 
 manner, the supporting l«g can be easily turned down, with a cant hook, 
 toward the front end of the load ! J 3 the load rest'-, on the bunks. 
 
 G-at e -frame support s . — A rectangular fr me (fig. 3) adequate to - 
 one end of the load at the req ired is pi • it 10 feet 
 
 mill platform. It may be tilted w: th the top slightly toward tl L, and 
 
 propped with a plank, or it may be supported bv a notched 2-by-4 (fig. 4, k) 
 with the - er end of the 2-by-4 nailed to Ihy 1 . .J.- 1 ' 11 
 tilted wil e top slightly ahead of cent;" (4Jj|Vf£ HBRAR¥ r 
 
 It maybe set up directly on the roadbed (fig. 4, A) 
 
 (fig. 4, 3) 
 
 ' i - -red • ■■-<-■ turned en a pipe 
 
 ( 
 
 
 4, B) o 
 
 the planked roadbed is cut out so that I 
 
 11 
 
 02' 
 
 -o. If anchored, 
 
 -■ oe 
 ' 
 be 
 •tion of 
 
 '• :.;e iftfk" v .l H^-k when flat, 
 provide a roadbed for the truck wheels at t .■ same lc-vel i a I fining 
 
 r< ..bed. The height of the ate should be ideqi ate to keep t real end rf 
 
 the pile above t .e load-out plat 'crny r^ thai l Lcuckj roller 
 
 engages under the load about a foot back f r tyri * tej • '" •'-ft' '"'- P\ he 'i£ 3 1 
 the load off t si pport as the tr -'- oont irnh-r, \ r \ S55 un or" ■ 
 mill platform has a stop to provide a backstop as thi 
 placing the load. 
 
 ts 
 
 
 nes back in 
 (ov 
 
 Heport No. 3.803-23 
 
 t Maintained at Madison, Wisconsin in cooperation with the UniverMty of Wisconsin 
 
 *S«« outline in Small Sawmill Improvement Working Phut. March 1930, lor explanation of indexing system proposed 
 
- 
 
 Figure 5 indicates the truck features and roller spacing. The metal 
 apron at the rear minimizes "breakage as loads are rolled off the truck.- By 
 cutting the end of the rear roller to take a wrench, provision can "be made 
 to unload the entire package in one operation. 
 
 Contributed by 
 C. J. TELFQBD 
 Small-mill Specialist 
 March 1945 
 
 Report Ho. R399-23 -2- 
 
PLATFORM 
 
 16 
 
 30" 
 
 3i D'AMETf 
 
 METAL BASE- 
 
 c 
 
 -»-/V£. /, 
 
 
 r n 
 
 
 
 
 
 
 m 
 
 
 ^ 
 
 
 — 
 
 IZ-X-12' 
 
 4" X 6" 'STRUTS 
 
 2"X 6' 3RACE- 
 
 l- -SQUARE FACT 
 FOR WRENCH 
 
 r"n 
 
 £-4-X-6" 
 
 BASE 
 
 -loading scaffold using portable Jacks and details of the standards in which the Jacks 
 are mourn 
 
 l "BOLT 
 
 Pt • Hoi t >■ r nrm In pi 
 
 ruck. 
 
 ^72 F 
 
UNIVERSITY OF FLORIDA 
 
 3 1262 08926 9772 
 
 
 LOAD 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 LOAD 
 
 Figure 3. — Truck-loading scaffold using gate-frame support. 
 
 Z X 10— 
 
 Z X 4 BRACE: 
 W X 10" 
 
 ^ 
 
 3" X 10"^ 
 
 '■V. 
 
 n 
 
 Z X 10 
 
 CHAIN 
 
 —3" X 10' 
 
 4" PI PL 
 
 B 
 
 Figure 4. — Details of two types of gate frames. k, gate frame supported by notched 2-by-4; B, gate 
 frame supported by chain and hinged on a pipe. 
 
 
 METAL 
 APRON 
 lb' WIDE. 
 
 4-6>~ 
 
 3'-^~\*- 
 
 SPACING OP ROLLERS 
 
 -6-o' 
 
 COLLAR 
 BEARING 
 
 — ROLLER 
 
 Figure 5.— Truck equipped with rollers for ease In loading and unloading, with details of truck 
 roller and roller spacing- 
 
 Z M 60973 f