Re-in forced Concrete for Farm and Estate Purposes, 125 



at a time, and reference to the accompanying figures will 

 make their construction and the method of re-inforcement 

 })lain (Figs. 2 and 3). The concrete both for them and for the 

 walls is composed of granite chips, sand, and portland cement, 

 in the proportion of 6 parts of chips and sand to 1 part of 

 cement, but any good aggregate can be used in the place of 

 the granite, which would be rather costly in many places. 



■-=1 



--f 





HORlZOhTALbECTlON 

 OF POST- «( PART- OF WALL ■ 



SHOWING POSmONOF REINFORCEMENT- 



H 



H 



m^ 



CROSS -SECTION OF 

 MOULD FOR POSTS 



SHOWING PIN TO LEAVE- HOLES 

 FORWALL REINFORCEMENT 



SIDE ELEVATION 

 OF- P05T 



5HEWIN0 REINFORCEMENT 

 AND HOUEb FOR WALL 

 REINFOMEMENT- 



Fig. 2.— Details of columns. 



The standard length for a column is about 10 ft., this being 

 the most useful length, and a size easily handled without 

 tackle. Lesser sizes are readily produced by blocking out 

 the moulds to the extent required ; they are about 9 in. by 

 4 in. in cross section, with the sides very much hollowed out to 

 l)ond with the walls. The re-inforcement is \ in. and | in. 

 round steel rods, and Mr. Geldart considers that, both for 

 efficiency and for economy, nothing better can ])e used either 



