First, the beams are laid on top of theboiler walls. The entire arch is suspend-ed from these beams and it will be notedthat any pressure the weight of the archmight exert must be straight downward.This eliminates any necessity for buck-stays and skew-back irons demandedby the sprung arch. … Second, the erector is shown hangingthe arch-bar casting from which thetile are suspended. The tightening oftwo bolts attaching this arch bar to thehangers that hang on the flanges of thesupporting beams, is all that is neces-sary to attach this casting.
Building materials · Masonry · Refractory masonry · Flat arch
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