OCR Text |
Show (Limber Is in the fGeieral Purpose Class lumber is largely general lumber. The Southern Pine )D defines it as lumber that Mured and classified into :apes, sizes and grades re-:r re-:r ordinary construction and purpose uses. Heavy tim-: tim-: structural purposes, soft-ctory soft-ctory lumber, and other spe- materials are not consid-yard consid-yard lumber. Esociation divides yard lum-twomain lum-twomain divisions (a) se-(b) se-(b) common. These again ced into two classes. Select 1) that suitable for natural and (2) that suitable for shes. Common lumber (1) I !:.ch can be used without nd (2) that which permits . sste. arious types are graded A, A has a minimum of de-blemishes; de-blemishes; B is permitted n number of defects and ss and C an even greater iportant factor is the mois-::ent mois-::ent which is permitted in :;us grades and classifica-The classifica-The greater the moisture ie more difficult it is to r to control the lumber after |