. The Practical brick and tile book. belongs peculiarly to ornamental brickwork(stone constructions being entirely excluded fromthis work), and we may add red first thing to be considered in connectionwith the oriel is its counterbalance. In allheavy projections in brickwork York flaggingstones are employed; they are built into themain wall from which the projection starts, pro-jecting to a distance suitable for the work. Theweight of the projection on the stones is counter-balanced by the greater weight of brickwork onthe other ends of the York slabs. But in thepresent case a gi
. The Practical brick and tile book. belongs peculiarly to ornamental brickwork(stone constructions being entirely excluded fromthis work), and we may add red first thing to be considered in connectionwith the oriel is its counterbalance. In allheavy projections in brickwork York flaggingstones are employed; they are built into themain wall from which the projection starts, pro-jecting to a distance suitable for the work. Theweight of the projection on the stones is counter-balanced by the greater weight of brickwork onthe other ends of the York slabs. But in thepresent case a girder or rolled iron joist, runningin the direction of the wall line, and enteringsome 12 inches into the brick wall forming theside jambs, would have to be placed sufficientlylow to allow the floor boards to pass over it. Theflags and the weight upon them would be counter- 86 BRICKWORK. balanced by tbe girder. Tbe principle ofcounterbalance is known to bricklayers by thename of tailing down. The whole of the oriel (Fig. 72) as shown. Fig. 72. would be in brickwork, gauged and set in projecting courses, as the moulded string h,and the window-sill would be covered with , slightly projecting to form a drip for thewater or rain. ORNAMENTAI. BBICKWORK. 87 The base liere shown would be surmountedwith mullions in brick or wood (most likelywood on account of its comparative lightness),and finished either with a semi-coned tiled roofor a balustrade. TVindows of this type may beseen at Carlyle House, Chelsea Embankment;and the Agnew Picture Gallery, New BondStreet. The bricklayer when setting out the workmust strike all the successive courses from onepoint, c, regulating the length of the radius-rodfor each course. Each course must radiate fromCy as shown in plan, and the face of each brick beworked to the required sweep or curve. Thebevels (which will be different for each and everycourse) will be obtained by placing the stock ofthe bevel on the line representing the
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