[M2.6backL]                                                           [M2.6back]
                                                                      
                                                                      	2.   The Roof is regulated in its form by the methods
                                                                      		adopted for crossing the interval between the walls or piers
                                                                      		This may be done, first by a cross bar or lintel;  and
                                                                      		the roof may be flat:  Secondly by two bars or beams
                                                                      		set at a slope and supporting in the centre;  and the
                                                                      		roof is  gabled;  Thirdly by an arch, and the roof vaulted
                                                                      		Of these methods the first is weak and barbarous;  All
                                                                      		good construction architecture consists of modifications
                                                                      		of the second or third.  For however strong the beams or
                                                                      		blocks may be, they are always better stronger, and reach farther
                                                                      		placed [diagram] so than so [diagram]
                                                                      		and the two blocks or beams a, a, are always, cheaper than
                                                                      		the one block or beam b necessary to cross the same
                                                                      		interval.
                                                                      	3.   The window, or door, generally may be considered as
                                                                      		"intervals" whose dignity is dependent on the methods
                                                                      		of supporting their heads:  Perhaps I had better take
                                                                      		this in the Second place:  after the wall:  considering
                                                                      		them as Intervals and associating them with the main intervals
                                                                      		and associating them with the main intervals between
                                                                      		the piers;  then after showing how the character of
                                                                      		buildings is dependent on their mode of heeding such
                                                                      		intervals;  proceed to the Gabled and Vaulted roof.

[Version 0.05: May 2008]