. Cyclopedia of architecture, carpentry, and building : a general reference work. )on which the stones are laid should be level,and cleared of dust or refuse, and well moistened with water. Upon this the bed of mortar is spreadevenly. Wooden wedges of thethickness of the joint are thenlaid on the face of the bed,and the stone carefully low-ered upon the wedges, to bemoved into exact position bythe aid of a pinch bar. Inusing a bar or rollers in hand-ling cut stone, it will l)e nec-essary to protect the edges ofthe stone by bagging or other T T Fig. 187. Ashlar Masonry. softening. AVhen the sto
. Cyclopedia of architecture, carpentry, and building : a general reference work. )on which the stones are laid should be level,and cleared of dust or refuse, and well moistened with water. Upon this the bed of mortar is spreadevenly. Wooden wedges of thethickness of the joint are thenlaid on the face of the bed,and the stone carefully low-ered upon the wedges, to bemoved into exact position bythe aid of a pinch bar. Inusing a bar or rollers in hand-ling cut stone, it will l)e nec-essary to protect the edges ofthe stone by bagging or other T T Fig. 187. Ashlar Masonry. softening. AVhen the stone is in its final position, the wedgesmay be removed and the stone settled into place and leveled bystriking with a wooden mallet. In the case of heavy stones wherethere would be danger of the weight of the stone squeezing the 135 126 BUILDING SUPERINTENDENCE. Broken Ashlar. mortar out of the joint, the wooden wedges are allowed to remainuntil the mortar has set. The bed of mortar should be keptback an inch or so from the face of the stone, so that thestone shall not bear on its outer edge. This will save raking outthe mortar when the wall is to be pointed, and will prevent any dan-ger of the splitting off of spalls on the face, which might occur on account of the mortar onI H = the face of the joint becoming hard sooner than the inside,when the unequal settlementwould bring pressure on theedge of the stone. The same defect may oc-cur if the bed of the stone iscut hollow or slack, as in , when the settlement ofthe mortar will bring thewhole pressure upon the frontedire of the stone with thesame result. For this reason, care should be taken that the bedjoints are square and true. Door and window sills should bel)edded only under their ends, as the natural settlement will causethem to break if bedded under the opening.(Fig. 140.) Stone
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