Sample Line Pull Calculation:
I. Data Required 

A. Unit weight of live load  50 lbs. 
B. Unit weight of attachment  5 lbs. 
C. Total live load  55 lbs. 
D. Maximum number of total loads on system  300 
E. Dead load ( Cable, trolley, etc)  4lbs. per foot 
F. Total system length  300ft 
G. Total elevation change  10ft 
H. Coefficient of friction  .03 
I. Load per foot (Item II.3 blow ÷ “F”)  59 lbs. / FT 
II. Line Pull Calculation (Monoplane)  
1.
Total live load x number of
loads 
16500 lbs. 
(“C” x “D”) 

2. Dead load x system length  1200 lbs. 
(“E” x “F”) 

3. Total load on system  17,700 lbs. 
(Add line 1&2 above) 

4. Multiply line 3 above x .03 
x.03 
5. Line pull for monoplane  531 lbs. 
III. Line Pull for Inclines/Declines (Multiplane Only)  
1.
Add for inclines – load per foot x elevation change

590 lbs. 
("I" x "G") 

*2. Deduct for declines – Load per foot x elevation change ÷ 1.3  453 lbs. 
3. Subtract deduct for decline from add for incline  136 lbs. 
IV. Total Line Pull  
Add paragraph II item #5 and paragraph III item #3  667 lbs. 
* If system is
to be unloaded at declines, omit step III. 