204 THE RUBBER TREE BOOK 



centres, 4O-feet-span steel trusses supporting steel angle- 

 purlines and corrugated-iron roof. Sides of building of corru- 

 gated iron fixed to steel angle-stringers. One foot of 3-in. 

 mesh expanded metal to be fitted all round the building. The 

 stanchions to be bolted down to concrete foundations and the 

 floor to be of 3-in. concrete rendered with the best Portland 

 cement and sloping to concrete drains all round the building. 

 Seven windows to be supplied, 5 feet by 3 feet, with wooden 

 frames and shutters. One doorway with iron-framed door 



FIG. 57. Bridge's Vacuum Drier. 



covered with corrugated iron. Total cost erected on site, 



375- 



Drying-house erected in Sumatra. The building to be of 

 steel, 90 feet long by 40 feet wide and 25 feet high. The roof 

 to be of No. 24 corrugated iron. Three floors, the first to be of 

 concrete. An iron stair to be supplied to the first floor and a 

 wooden stair to the second floor. Twelve windows. Cost 

 erected on site, 530. 



Most planters now specify for a wooden roof under the 

 corrugated iron roof, as otherwise the building is apt to get too 

 hot for comfort. 



The latest suggestion is to build drying-sheds without any 

 walls at all, that is to say, with only expanded metal sides. In 



