450 



ERECTION OF STRUCTURAL STEEL. 



CHAP. XIV. 



t/ft 



Tons 



Rigging 

 li" Manila Rope 



Lift 

 Tons 





Rigging 



/j Manila Rope 



Lift 

 Tons 



I? Manila Rope 



Single 



ZParts 



Single 



2Parts 



Sing/e 

 2 Parts 

 Single 



O^ing/e 

 ? Parts 

 Single XJ 



10 



Triple 

 f Parts 

 Double 



QDoub/e 

 5 Parts 

 Double N 



Double 

 3 Parks 

 Single 



Single Cj 

 2> Parts \ 

 \J 



3Parts 



II 



Triple 



6Parts 



Triple 



6tert 



Triple 



Double 

 4 Parts 

 Double 



4 Parts 

 Double 



7 



Double 



12 



6 Parts 



Trip/e 



Double 

 4 Parts 

 Double 



4 Parts 

 Double 



8 



4 Parts 

 Double^ 



/3 



Quadruple 



SParts 



Quadruple 



SParts 



Quadrupl 



le^ 



8 



Triple 

 6 Parts 

 Trip/e 



6 Parts 

 Triple 



Double 

 4 Parts 

 Double 



Double 



14 



Quadruple 

 8 Parts 

 Quadruple 



12 "Blocks For 1^" Rope- 

 Capacity of Blocks 



Single with Hook, 5 Tons- 

 Double with Hook, 7 Tons- 

 Trip/e with Hook, 8 Tons- 

 Approximate pulJ 'on lead line > 2 Tons* 

 14" Blocks for Ii "Rope- 

 Capacity of Blocks 



Single m'th Hook, 6 Tons- 

 Double with Hook, fO Tons' 

 Triple with Hook, 12 Tons* 

 Quadruple with Shackle, 14 Tons* 

 Approximate pull on lead line, 3 Tons* 

 20" Blocks for 2" Rope- 

 Capacity of Slocf^s 



Single with Shackfe, f5 Tons- 

 Double with Shackle, 22 Tons- 

 Triple with Shackle, 50 Tons- 

 Quadruple with Shackle, 35 Tons* 

 Approximate pu// on lead line, 5 Tons- 

 These values are only for tackle as shown- If lead 

 line is snatched or passes orer additional sheaves, 

 capacity diminishes* 



LIFTING CAPACITY OF TACKLE 

 WOODEN SHELL BLOCKS WITH MANILA ROPE* 



FIG. 5. 



