﻿36 



BULLETIN 1136, U. S. DEPARTMENT OF AGRICULTURE. 



Table 4. — Softtcood 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. 



Per cent. 



Pir a ul. 



"F. 



°F. 



Per cent. 



Initial. 



Initial. 



Initial. 



135 



129 



85 



30 



25 



20 



150 



132 



GO 



20 



16 



13 



175 



140 



40 



15 



12 



10 



175 



130 



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. 



a 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 



Cedar, Port Orford 



Cedar, western red 



Cedar, while 



Cypress, bald 



Douglas fir 



Size. 



Softwood 

 schedule. 



Remarks. 



4/4-6/4 

 7/4-9/4 



4/4-6/4 

 4/4-6/4 



71 !)'-) 

 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 

 4/4-0/4 

 7/4-9/4 

 10/4-12/4 



00-111 

 00-1V 



00-IV 

 O-III 



oo-in 



0-111 



o-ni 



00- II 



00-111 



0- It 



00- I 



00- II 



o- 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. 



