124 Materials and Thrir 1 1 until ing 



hooked, or because they raise the hooks before 

 the unhooking is finished. These are the most 

 important things a crane man should guard 

 against. Never drag slings, chains, hooks, or 

 loads along the floor. Heavy side pulls should 

 be forbidden. All hooks should be forged and 

 of proper design. They should bend slowly ami 

 gradually if overloaded, thus giving sufficient 

 warning. 



Keep workmen from being under the load. 

 This is not always possible, but every effort should 

 be made to bring it to pass. 



Safety in Unloading and Storing Material. 

 dravel, ore, and lumber should not be piled within 

 six feet of the nearest rail, in order that there may 

 be a safe distance between the cars and the ma- 

 terials in case men are standing by the track. If 

 this is impossible, signs should be placed at each 

 end of the pile to warn against passing between 

 the pile and the track. Gangplanks for trans- 

 ferring materials to and from cars should be 

 strong and kept in good condition. 



All materials should be carefully stowed in such 

 manner as to be secure against sliding, displace- 

 ment, and breakage. Many accidents occur 

 through piling, unpiling, and storing material. 

 Lumber and planks should be crosstied at fre- 

 quent intervals, and as much care should be taken 

 in unpiling as in piling. 



Brick should not be piled higher than seven 

 feet, and the pile should be tied at every tier with 

 alternate courses of headers and stretchers. When 



