15 



ERECTION. 



Here again any one with ordinary medianiccil ability can erect one of these 

 houses. Pipe can be bought cut and threaded as required l^y a local man and the 

 grower can erect liis own house. Care must be taken to have all parts set in line 

 and at the correct height. A slight variance in setting supportiug members will 

 give endless trouble. Supporting members should be set on a solid foundation 

 preferably concrete, and should be filled in around with concrete to a depth of 

 eight inches. Usually growers have the concrete work come up above the surface 

 of the ground some five inches to prevent the surface water from rusting the pipe. 

 A common method is to place an ordinary field tile around the base of the pipe 

 allowing it to come up above the surface and filling it in with concrete and mould- 

 ing it ofE on top. 



Supporting members have to be set so that there is a purlin every eight feet on 

 the sash bar. These purlins have to be supported every eight feet. It has been 

 found that to increase this distance increases the risk of solidity in the house. In 

 some cases this has been tried with some degree of success but the grower took 

 considerable risk in building such a house. 



The purlins do not of necessity need to have their supporting members come 

 directly from the ground in all cases. By using a V or Y brace the ridge support 

 will carry two purlins as well. This does away with two rows of columns. In 

 cases where this brace is used there should be a brace running from the eave support 

 to the ridge support usually of three-quarter or one inch pipe held in position by 

 split T's. These should be set high enough from the ground to permit operating 



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W^' 4 - • ■: 





Angle iron purlins are sometimes used. The Y brace is used to lessen the number of 



supports. 



