176 CEMENT AND CONCRETE 



Instructions: 



, 1) Excavate to a depth of 14" below floor level. 



2) Construct outside form in place. 



3) Construct inner form, to be put in place after floor 

 is made, so wall will be 4" thick. 



4) Provide reinforcing material, either rods or heavy hog 

 wire. 



5) Put drain in place so coupling will be at surface of low 

 place in floor. 



6) As a protection to top of inner wall, provide a 4" chan- 

 nel iron with 3/8" by 6" anchor bolts threaded into it, 

 as illustrated. 



7) Mix concrete of 1 : 2 : 4 proportion to a quaky con- 

 sistency. 



8) Place concrete in floor to a depth of 6" with reinforcing 

 in place. 



9) Form corrugations in bottom of tank sloping toward 

 outlet. 



10) Adjust inner form in place, with reinforcing extending 

 up from floor and entirely around wall of tank. 



11) Place concrete in walls of tank. 



12) Firmly seat the channel iron with anchor bolts on inner 

 wall, hammering it into place with a wood maul. 



13) Remove inner form at the end of twenty-four to forty - 

 eight hours, and finish surface with a cement wash. If 

 there are any holes, use a 1 : 2 cement-sand mortar to 

 fill them. 



14) Remove outside form after several days, and finish 

 surface with a stiff brush. 



