MISCELLANEOUS TABLES. 
133 
TABLE III. Continued. 
By which may be determined the depths of Ceiling Joists, Rafters, 
Floor Joists, &c. ; the breadth being 1| inches, and the deflec- 
tion of an inch to the foot, when uniformly loaded with the 
weights in this table. 
WEIGHT IN POUNDS UPON EACH FOOT IN LENGTH. 
125-0 144-7 166-3 190-1 216-0 244-1 274-6 307-5 343-0 381-0 
DEPTH IN INCHES. 
1 
•79 
-83 
•87 
2 
1-58 
1-65 
1-73 
3 
2-36 
2-48 
2-60 
4 
3-15 
3-31 
3-47 
5 
3-94 
4-14 
4-33 
6 
4-73 
4-96 
5-20 
7 
5-52 
5-79 
6-07 
8 
6-30 
6-62 
6-93 
*9 
7-09 
7-45 
7-80 
10 
7-88 
8-27 
8-67 
11 
8-67 
9-10 
9-53 
12 
9-45 
9-93 
10-40 
13 
10-24 
10-75 
11-27 
14 
11 03 
11-58 
12-13 
15 
11-82 
12-41 
13-00 
16 
12-61 
13-24 
13-87 
17 
13-39 
14-06 
14-73 
18 
14-18 
14-89 
15-60 
19 
14-97 
15-72 
20 
15-76 
9-97 
10- 87 
11- 78 
12- 69 
13- 59 
14- 50 
15- 40 
-95 
1- 89 
2- 84 
3- 78 
4- 73 
5- 67 
6- 62 
7- 56 
8- 51 
9- 45 
10- 40 
11- 35 
12- 29 
13- 24 
14- 18 
15-13 
•98 
1-97 
2^95 
394 
4-92 
~bm 
6- 89 
7- 88 
8- 86 
9- 85 
10^ 
11^82 
12- 80 
13- 79 
14- 77 
1 02 
2-05 
3^07 
4- 10 
5- 12 
6- 15 
7- 17 
8- 19 
9- 22 
10- 24 
11- 27 
12- 29 
13- 32 
14- 34 
1- 06 
2- 13 
3- 19 
4- 25 
5- 32 
6- 38 
7- 45 
851 
9-57 
10-64 
11- 70 
12- 76 
13- 83 
14- 89 
1- 10 
2- 21 
3- 31 
4- 41 
5- 52 
"6^2" 
7- 72 
8- 82 
9- 93 
11-03 
12- 13 
13- 24 
14- 34 
Multipliers to give the breaking weight of every Scantling in each c 
alumn respectively. 
6-67 
6-35 
6-06 
5-80 
5-56 
5-34 
513 
4 
94 
4-76 
4-60 
The depth and weight being the same, the deflection varies inversely as Ihe breadth ; 
as in the example to this, and the following tables. 
• Example. — A Red Pine joist 9 feet long 7-09 in. by in., with 125 lbs. weight to the 
foot, unifonnly loaded, deflects in the middle -S^ of an inch ; with the same weight, 7'09 in. 
by If in. deflects of an inch ; 7'09 in. by 2 in. deflects -^j of an inch ; 7'09 in. by 2i in. 
deflects of an inch ; 7^09 in. by 2^ in. deflects of an inch ; 7"09 in. by 2f in. deflects 
9 of an inch; and 7'09 in. by 3 in. deflects of an inch. 
