Ill 



distance between the center and corner stakes is longer than the straight 

 edge, intermediate stakes may be driven. Each intermediate stake is made 

 level with X. 



From a point A on the cross board ab, a line is stretched in the direc- 

 tion of B, which is the desired frontage of the house. Measure off on 

 this line from the point O the length of the desired house, and about this 

 point O' fix stakes and cross boards level with X similar to those at the 

 initial corner O. Then fasten the line AB at B. This represents the front 

 edge of the permanent wall and floor. Next, with the square find the 

 point C which, when connected with the point O', makes a line at right 

 angles with AB. Mark off on this projected line CD a distance from 

 O' to O" equal to the desired width of the building, and about this corner 

 O" place the usual level corner boards. In finding the last corner of the 



FIG. 56. How to mark out a rafter 



house mark off on a line EF from O" the length of the house, and on a 

 line HG from O the width of the house. Swing these two lines together 

 until the two distances intersect at the point O'". Then fasten lines 

 EF and HG at the corner boards level with X about the corner O" 1 '. 



The four corners of the house are now indicated by the intersections 

 of the four lines AB, CD, EF, and GH. These lines also represent the 

 level of the floor and outside line of the foundation. They can be removed 

 at any time and later replaced by simply connecting the points A, B, C, D, 

 etc., on the permanent corner forms. 



For indicating the width of the trench or the thickness of the wall, 

 other lines, such as A'B', C'D', etc., can be made by connecting the points 

 A', B', etc., which are located at an equal desired distance from A, B, etc. 



For checking the square corners of the wall, use the 6-8-10 rule. Meas- 

 ure 6 feet in one direction from the corner and 8 feet in the other. If 

 the two points thus determined are 10 feet apart the angle formed by 

 the lines connecting the points with the corner will be a right angle. 



