n6 



ENGINEERING ON THE FARM 



Sawed 

 Width 



2-Inch 



4-Inch 



6-Inch 



8-Inch 



io-Inch 



12-Inch 



Sawed 

 Depth 



Actual Width and Thickness of Lumber Surfaced on One Side and One 

 Edge 



I 



6". 

 8". 

 10" 

 12' 



iVsXlM 



3% X3 5 A 



3%X5 5 A 



zY%XiY% 



3% X9% 

 3 5 AXiiV 8 



sVsXsVs 

 S%X7% 



sHXqM 

 sMXiih 



7MX7K 



iHXgV 



i3/Ytt3, 



4 

 iVi Xll^4 



9% xoH 



9HXH-. 



nMXiiM 



The above timbers surfaced on four sides are reduced }4 

 inch in each dimension. A i-inch rough board surfaced 

 on two sides will be reduced in thickness to $4 inch. 

 Timber may be had up to 24 inches by 36 inches, surfaced 

 on one side and one edge with a decrease of J4 i ncn i n eacn 

 dimension after surfacing, or .surfaced on four sides with a 

 decrease of }4 inch in each dimension. Three-inch matched 

 ceiling and flooring laid will cover only 50 per cent of the 

 nominal area; 4-inch, 67 per cent; and 6-inch, 

 80 per cent; i>^-inch face flooring matched will 

 cover only 50 per cent of the nominal area; 

 2 -inch, 62^ per cent; 2)4 -inch, 66^3 per cent; 

 -and 3^-inch, 76 per cent. 



Definition of terms. Terms used in the grad- 

 ing and sale of lumber follow. 



Ceiling. Lumber tyi inch, ^i inch, ^4 mc h 

 thick, surfaced on one side, with bead on 

 tongued edge and at the center. When the 

 back has a V-groove as shown in Figure 117, it 

 is called partition. Ceiling commonly used 

 comes in 4-inch and 6-inch widths. 



Drop siding. Lumber which has been pre- 

 pared for use as the outside covering of a build- 

 v- ing. It is dressed and matched and the face 



gr00 ceiUn a g ded corner next t0 the tongue is shaped (Fig. 118). 

 D &M. Lumber which has been dressed and 

 matched with a tongue and groove (Fig. 119). 



Finishing. Lumber of such quality that it can be used 

 for the outside or inside finish of a building, as the doors, 

 casings, base, cornice, and barge board. 



