52 BULLETIN 1136, U. S. DEPARTMENT OF AGRICULTURE 
TABLE 4.—General softwood kiln-drying Schedules 0, 00, and 000 
SCHEDULE 0 
Moisture content at which changes should be made, per cent Dry- | Wet- | Rela- 
bulb bulb tive 
temper-|temper-| humid- 
Division I Division II Division IIT ature | ature ity 
Sah: °F. |Per cent 
SLOT, MOLO sa see eee SS 30 OL MOre Sas See le Boe) 240 OP wor) ee 135 123 70 
pa} a BU a AIC ATA Ye PL 1g aA Me el IM uty Sg a 7A U Eee APA epi ph ah rn a oN 150 126 50 
7 SS eae SE A eS i6 ple OO Pe Ee as eS 2 LOS Sa Ph We oe eae eee oe 165 132 40 
IP By OREN a UN emia, 2h if: Ze are x er ae ern eT 1) Jee eae a US et eo 175 130 30 
at | 
SCHEDULE 00 
' Moisture content at which changes should be made, per cent Dry- | Wet- | Rela- 
bulb | bulb tive 
are: EL aos ; tem per-| temper-| hurvid- 
Division I Division IT Division IIT Division IV ature | ature ity 
2 50h ° Ff. |Per cent 
45 or More_----.._- ae or more_.-...._- 35 or More-_--_..--- ay or more__.__.--- 160 146 70 
AQ WER ee ee a Ove ee ae oes 0 Rema pa ne Se SHH As ee als 170 144 50 
ZOE AE CERES, ie ped Boe ee a Hee BEE i Se pee A ot 3 Bab Sd See Ee ale 180 135 30 
SCHEDULE 000 
Moisture content at which changes should be made, per cent Dry- | Wet- | Rela- 
bulb | bulb tive 
{ temper-| temper-| humid- 
Division I Division IT Division III _ Division IV ature | ature ity 
© I, °F. |\Per cent 
45 or more---_----- 40 or more_--_----- SOLO MOresess seen 30 or more___-2--_- 180 165 70 
AQ REECE IS Gio Bees eet See weed lie SOEs Aaa 2 Dee ZO RE ent eee 190 161 50 
2 a2 ie SRS a ea A Ge 22280 8 ae Ue 1B so Ses ees 322 SE re Jee. 200 150 30 
Temperatures for vertical-grain flooring strips may be 10° F. higher 
than those in the schedules, after the stock has dried to a ) moisture 
content of 25 per cent. 
Tasiy 5.—Index of general kiln-drying schedules for various softwood species, to 
use with different thicknesses of lumber 
Size of Softwood 
Species of wood poet eehedule Remarks 
Cedar, Port; Orfords.2 2 Se ee 4/4-6/4 00-III 
7/4-9/4 00-IV 
Cedar; western red =! 225222 0s ee eae 4/4-6/4 00-IV | Wide, clear (after sinker stock has been 
removed). 
4/4-6/4 0-III | Sinker stock. 
7/4-9/4 Q0-III | Free from sinker stock. 
7/4-9/4 0-III | Sinker stock. 
10/4-12/4 0-III 
eon, northern white and southern 4/4-6/4 OO0-II | Flat grain. 
white. 
7/4-9/4 00-III 
10/4-12/4 0-IT 
Cypress; southern 22 eel ae eee 4/4-6/4 00-1 
7/4-9/4 00-II 
10/4-12/4 0-I 
Wouglas fir oes oe heave coon 34-4 00-1V | Cross arms. 
4/4-6/4 000-1V 
4/4-6/4 00-IV | Wide, flat grain, 
7/4-9/4 00-ILV 
10/4-12/4 Q-Ill 
