142 MISCELLANEOUS TABLES. 
TABLE VIII. 
By which may be determined the depths of Rafters, Floor Joists, 
Bridging Joists, Binding Joists, &c.; the breadth being 21 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. 
LeDgth 
iu feet, 
clear 
34-32 
42-87 
52-73 
64-00 
76-76 
91-12 
1071 
1250 
144-7 
166-3 
bearing. 
DEPTH IN INCHES. 
~r 
2 
3 
4 
5 
•42 
•84 
1-26 
1- 67 
2- 09 
•45 
•90 
1-35 
1-80 
2^25 
•48 
■97 
1-45 
1-93 
2^41 
•52 
1-03 
1- 55 
2- 06 
2-58 
•55 
1-09 
1- 64: 
2- \9 
2-74 
•58 
M6 
174 
2^32 
2^90 
•61 
r-22 
1- 83 
2- 45 
3- 06 
-64 
1-29 
1- 93 
2- 58 
3- 22 
•68 
1- 35 
2- 03 
2- 70 
3- 38 
•71 
1-42 
212 
2^83 
3-54 
6 
*7 
8 
9 
10 
2-51 
2- 93 
3- 35 
3- 77 
4- 18 
2- 70 
3- 15 
3- 61 
4- 06 
4^51 
2-90 
3^38 
3^86 
4-35 
4-83 
'¥69 
3- 61 
4- 12 
4^64 
5- 15 
3-28 
3- 83 
4- 38 
4- 92 
5- 47 
3^48 
4^06 
4^64 
5^21 
5^79 
3^67 
4-28 
4- 89 
5- 50 
6- 12 
3- 86 
4- 51 
5- 15 
5- 79 
6- 44 
4-06 
4- 73 
5- 41 
6- 08 
6^76 
4-25 
4-96 
5^67 
6^37 
7^08 
11 
12 
13 
14 
15 
4^60 
5-02 
5-44 
5- 86 
6- 28 
4^96 
5-41 
5- 86 
6- 31 
6-76 
5- 31 
5^79 
6^28 
6- 76 
7- 24 
5- 67 
6- 18 
6- 70 
7- 21 
7-73 
6-02 
6- 57 
7- 11 
7^66 
8- 21 
6^37 
6-95 
753 
8^11 
8^69 
6- 73 
7- 34 
7^95 
8^56 
9^17 
7-08 
7- 73 
8- 37 
9- 01 
9-66 
7- 44 
8- 11 
8^79 
9- 46 
10-14 
7- 79 
8- 50 
9- 21 
9-91 
10-62 
16 
17 
18 
19 
20 
6- 70 
7- 11 
7-53 
7- 95 
8- 37 
~T2\ 
7- 66 
8- U 
8- 56 
9- 01 
7- 73 
8- 21 
8- 69 
9- 17 
9-66 
8- 24 
8^76 
9- 27 
9^79 
10-30 
8- 76 
9- 30 
9-85 
10-40 
10-94 
9-27 
9-85 
10- 43 
11- 01 
11-59 
9-79 
10- 40 
11- 01 
11^62 
12- 23 
10-30 
10- 94 
11- 59 
12- 23 
12-88 
10^2' 
11-49 
12^17 
12^84 
13-52 
11- 33 
1204 
12- 75 
13- 45 
14- 16 
Multipliers 
to give the breaking weight of every Scantling in each column respectively. 
12-56 
11-67 
10-89 
10-21 
9-61 
9-07 
8-59 
8-16 
7-92 
7-42 
* Example. — If the weight upon each foot in length of a floor joist 7 feet long, 4-06 in 
by 2| in., be 91'12 ibs. to the foot, the deflection is of an inch, and the brealcin 
weight of the same is 9 07 times the tabular weight ; if the weight upon each foot in length b 
91-12 X 2 = 182-24 lbs. to the foot, the deflection is £^ x 2 = ^^ of an inch, and the multi 
plier to give the breaking weight is =4-53. 
