92 Sloan's Architectural Review and Builders' Journal. [August, place. This lift extends from the fifth stoiy to the basement. In the latter are the furnaces, boilers, steam-engine and machinery ; and also work-shops for certain classes of work. About two- thirds of the basement, and of the vaults on Sansom and Twelfth streets are thus occupied. The other portion is held by- Messrs. Bailey & Co. ; and connects, by a convenient and commodious stair- case, with their grand apartments on the ground floor. The heating of the entire building is done by steam, partly by direct radia- tion in the respective rooms, and partly by warm air conveyed to the apartments by means of flues ; and all produced by steam coils and radiators placed in the basement. The iron beams throughout all the stories, except the first floor, as already described, are compound, 27| inches deep ; and placed 8 feet 1 inch to 9 feet 10 inches between centres, with a brick arch of single thickness, strengthened by a compound hunch on each side, be- tween them, as represented by fig. 1. Description of the figure : AA, the iron beams ; B, soffit of the arch ; C and D, hunches, forming the compound hunch on either side ; E, crown of the 4-inch arch ; P, the open space, or the cross-wall ; GGGrG, sleepers ; and H, the floor. These beams are clamped together by iron rods, to prevent any lateral thrust from the arches, throughout the entire length of the building. Across the arches an 8-inch wall is run every 6 feet, the object being to lighten the weight. On top of these walls, 3 by 4 inch sleep- ers are laid, 16 inches apart, to receive the flooring. All the floors, above the first, are of Southern, or true yellow pine, which is best adapted to the special use for which the building was designed. The roof is constructed of iron frame- work, as in figure 2, and covered with tin. AA are the side walls of the building. B is the suspension-brace in the centre of the cross-beam. C, the furring-piece upon which rests the rough boarding for the roof. These pieces are secured by angle-irons to the beam. The boarding and the roof itself are not represented in the cut. Running through the foot of the suspension-brace B, to the head of the walls, at AA, are the suspension- rods, secured at either extremity, as de- picted in the figure. In Fig. 3 are the several detached parts of the above drawn to a larger scale. A I is a transverse section of the brick wall on which rests the end of the iron beam, here given inlongitudinal elevation, with the end fastening of the connecting rod, the same at either end of the beam. B, a cross-section of the beam, and also the suspension-brace, showing at the top, in longitudinal ele- vation, the part of a furring-piece having the complete angle-iron fastening; and, at the bottom, the insertion and adjust- ment of the suspension-rods. C, longi- tudinal elevation of the iron beam, with
