PPS 10 Telecommunications·Page 22·6.18
Site Sharing as Alternative to Mast Sharing
Site sharing, including rooftop and ground-based options, may be more appropriate than mast sharing depending on location characteristics.
Depending upon the characteristics of the location, site sharing (both rooftop and ground based sites) as opposed to mast sharing may represent a more appropriate solution. A second installation located alongside or behind the principal installation may, for example, provide a more beneficial solution in environmental and planning terms.
Source — /Users/richardhill/Documents/planning-arch-project/data/documents/regional/PPS 10 - Telecommunications.pdf