THE THEORY OF CITY DESIGN. 



83 



Metres. 

 Xiarge suburban residences with grounds ... ... 80 x 160 



Larger business sites, city residences, etc. ... 60 x 120 - 160 



Smaller establishments. 40x80; 30 x 60 - 90; 20 x 60 



"Workmen's dwellings ... ... ... ... ... 10x30 



If smaller areas than these last are admitted the elements of 

 hygiene and beauty must be correspondingly sacrificed. The 

 length of blocks may vary between say 100 and 200 metres, or 

 ^say between 330 and 660 feet, and rear lanes be from 10 to 15 

 metres in width, say 33 to 50 feet. 



13. Height of buildings. — Apart from the impossibility of 

 adequately dealing with fires breaking out in very high buildings, 

 and the consequent jeopardy to property generally, and apart also 

 from any consideration of the aesthetic defects of such buildings; 

 a certain height may be regarded as injurious, as unduly limiting 

 the sky-line, and as preventing sufficient access of direct and 

 diffused sunlight to the properties in the neighbourhood. The 

 ^following table shewing the lengths of shadow when the direction 

 of the sun is 45° off the meridian, and the directions and lengths 

 when it is three hours off the meridian, will afford the data from 

 which a judgment may be formed as to the limits that may be 

 •considered reasonable, in restricting the height of buildings. 



Fig. 8. 

 VI T. — Lengths of shadows 45° and at 3 hours off the meridian, 



Lat. 35° S. vertical 100. 

 Date. Dec. 22 



45° off 27(a) 

 3 hrs. off 86 

 Direction 86° 



Jan. 19 



Nov. 24 



35(6) 



90 

 81|° 



Feb. 19 

 Oct. 24 



59(c) 



107 



Mar. 21 

 Sep. 23 



100(d) 

 141 



60i° 



Apr. 21 



Aug. 23 



166(e) 



197 



51° 



May 22 



July 23 



276 (/) 



273 



45° 



June 22 



350(flr) 



314 



43° 



