36 
BULLETIN 1136, IT. S. DEPARTMENT OF AGRICULTURE. 
Table 4. — Softicood schedules Nos. 0, 00, and 000. 
SCHEDULE 0. 
Moisture content at which changes 
should be made. 
Dry bulb. 
Wet bulb. 
Relative 
humidity. 
Div. I. 
Div. II. 
Div. III. 
Per cent. 
Initial. 
30 
20 
15 
Per cent. 
Initial. 
25 
16 
12 
Per cent. 
Initial. 
20 
13 
10 
°F. 
135 
150 
175 
175 
°F. 
129 
132 
140 
130 
Per cent. 
85 
60 
40 
30 
SCHEDULE 00. 
Moisture content at which changes should be 
made. 
Dry bulb. 
Wet bulb. 
Relative 
humidity. 
Div. I. 
Div. II. 
Div. III. 
Div. IV. 
Per cent. 
Initial. 
40 
20 
Per cent. 
Initial. 
35 
16 
Per cent. 
Initial. 
30 
13 
Per cent. 
Initial. 
25 
13 
°F. 
160 
170 
180 
°F. 
154 
150 
135 
Per cent. 
85 
60 
30 
SCHEDULE 000. 
Per cent. 
Per cent. 
Per cent. 
Per cent. 
°F. 
°F. 
Per cent. 
Initial. 
Initial. 
initial. 
Initial. 
180 
173 
85 
40 
35 
30 
25 
190 
168 
60 
20 
16 
13 
13 
200 
150 
30 
Temperatures for vertical-grain flooring strips may be 10° higher 
than those in the schedule after the stock has dried to a moisture con- 
tent of 25 per cent. 
Table 5. — Index of drying schedules for use with various species and thick- 
nesses of softwood lumber. 
Species. 
Size. 
Softwood 
schedule 
Remarks. 
Cedar, Port Orford 
Cedar, western red, 
Cedar, white 
Cypress, bald 
Douglas fir 
4/4-6/4 
7/4-9/4 
4/4-6/4 
4/4-6/4 
7/4-9/4 
7/4-9/4 
10/4-12/4 
4/4-6/4 
7/4-9/4 
10/4-12/4 
4/4-6/4 
7/4-9/4 
10/4-12/4 
3-1/2-4-1/2 
4/4-6/4 
4/4-6/4 
7/4-9/4 
10/4-12/4 
00-111 
00-IV 
00-IV 
0-III 
00-111 
O-III 
0-III 
00- II 
00-111 
0- II 
00- I 
00- II 
0- I 
00-IV 
000-IV 
00-IV 
00-IV 
O-III 
Wide, clear (after sinkers are removed). 
Sinker. 
Free from sinkers. 
Sinker. 
Flat grain. 
Cross arms. 
Wide, flat grain. 
