Origin of span roof
Examples from the Web for span roof
Historical Examples of span roof
Or it may be because the full light of a span-roof is too strong in most situations.The Woodlands Orchids
Span-roof garden frame (fig. 12) may under some circumstances be useful as a substitute for the three-light frame.
During the remainder of the year, they occupy a three-quarter span-roof house, in which an intermediate temperature is maintained.Cactus Culture For Amateurs