MISCELLANEOUS TABLES. 
135 
TABLE IV. Continued. 
By which may be determined the depths of Ceiling Joists, Rafters, 
Floor Joists, Bridging Joists, &c.; the breadth being If inches, 
and the deflection -^^ of an inch to the foot, when uniformly loaded 
with the weights in this table. 
weight in pounds upon each foot in length. 
Length 
in feet, 
clear 
bearing. 
125-0 
144-7 
166-3 
190-1 
216-0 
244-1 
274-6 
307-5 
343-0 
381-0 
DEPTH IN INCHES. 
1 
3 
4 
& 
•75 
1- 50 
2- 25 
2- 99 
3- 74 
•79 
1- 57 
2- 36 
3- 14 
3-93 
-82 
1- 65 
2- 47 
3- 29 
4- 12 
•86 
1- 72 
2- 58 
3- 44 
4- 30 
-90 
1- 80 
2- 69 
3- 59 
4- 49 
-94 
1- 87 
2- 81 
3- 74 
4- 68 
-97 
1- 95 
2- 92 
3- 89 
4- 86 
1- 01 
2- 02 
3- 03 
4- 04 
5- 05 
1- 05 
2- 10 
3- 14 
4- 19 
5- 24 
1- 09 
2- 17 
3- 26 
4- 34 
5- 43 
6 
i 
8 
*9 
10 
4- 49 
5- 24 
5- 99 
6- 74 
7- 48 
4- 71 
5- 50 
6- 29 
7- 07 
7-86 
4- 94 
5- 76 
6- 59 
7- 41 
8- 23 
5- 16 
6- 02 
6- 89 
7- 75 
8- 61 
5- 39 
6- 29 
7- 18 
8- 08 
8-98 
5- 61 
6- 55 
7- 48 
8- 42 
9- 36 
5- 84 
6- 81 
7- 78 
8- 76 
9- 73 
10^ 
11- 68 
12- 65 
13- 62 
14- 59 
6- 06 
7- 07 
8- 08 
9- 09 
10-10 
6- 29 
7- 33 
8- 38 
9- 43 
10-48 
6- 51 
7- 60 
8- 68 
9- 77 
10-85 
11 
12 
13 
14 
15 
8-23 
8- 98 
9- 73 
10- 48 
11- 23 
8- 64 
9- 43 
10- 22 
11- 00 
11-79 
9-06 
9-88 
10- 70 
11- 53 
12- 35 
9-47 
10- 33 
11- 19 
12- 05 
12-91 
9-88 
10- 78 
11- 68 
12- 57 
13- 47 
To^ 
11- 23 
12- 16 
13- 10 
14- 03 
TFir 
12- 12 
13- 13 
14- 14 
15- 16 
11- 53 
12- 57 
13- 62 
14- 67 
15- 72 
11-94 
13- 02 
14- 11 
15- 19 
16 
17 
18 
19 
20 
11- 97 
12- 72 
13- 47 
14- 22 
14-97 
12- 57 
13- 36 
14- 14 
14- 93 
15- 72 
13- 17 
14- 00 
14- 82 
15- 64 
13- 77 
14- 63 
15- 49 
14- 37 
15- 27 
14- 97 
15- 90 
15-57 
Multipliers to give the breaking weight of every Scantling in each column respectively. 
7-02 
6-69 
6-38 
6-10 
5-85 
1 
5-62 1 5-40 
5-20 
5-01 
4-84 
* Example. — A Red Pine Scantling 9 feet long 7'07 in. by If in., with 144-7 fbs. weight 
to the foot, uniformly loaded, deflects in the middle of an inch ; with the same weight, 
7-07 in. by 2 in. deflects -^^ of an inch ; T'O? in. by 2i in. deflects of an inch ; T'O? in. 
by 2§ in. deflects of an inch ; 7'07 in. by 2f in. deflects -^^ of an inch ; and 7'07 in. by 
3 in. deflects ^ of an inch. 
The breaking weight of Red Pine 9 feet long T'O? in. by 1| in., is 9 x 1447 x 6-69 = 8712 
lbs. uniformly loaded, or 4356 lbs. suspended from the middle. 
