The daily morning journal and courier., 1897-12-22

inches deep and under shall have bearings equal to their depth, If resting on wall nine and tweve-inch beams shall have bear ing of ten inches, and all beams more than twelve inches in depth shall have bearings or not less than twelve Inches If resting on wall. Where beams rest on iron supports. and are properly tied to the same, no greater bearings shall be required than one-third or the depth of the beams. Iron or steel floor beams shall be so arranged as to spacing and length of beams that the load to be, be supported by them. together with the weights of tho materials used In cause defection of the said beams of mora than one-thirtieth of an inch per linear foot or span and they shall be tied together at in- tervals or not more than eight times the depth of the beam.
 ?. Under the ends of all iron or steel beams where they rest on the walls. a stone or cast-lron template shall be built into the walls. Said template shall be eight inches Wide in twelve-inoh walls and in walls of greater thiekness said template shall be twelve lncnes wioe, and such templates, if of stone. snail not be in any case less than two and one,haf inches in thickness, and no template shall be less than twelve inches long
 .. All pricK or stone arches placed between iron or steel floor beams shall be at least four inches thick, and have rise of at least one anu quarter inches to each foot of span between the beams. Arches of over five feet span shall be properly increased in thickness, RE. the space between the beams may be filled in with sectional hollow brick of hard burnt clay, porous terra cotta, or some equally good hreproof material having a depth of not less than one and one-Quarter inches to each foot of span, variable distance being allowed of not over six inches in the span between the beams. The said brick arches shall be laid to line on the centers, with close-joint ana the bricks shall be well-wet. and the joints filled with cement mortar in proportions or not more than two of sand to one of cement by measure The arches shall be well grout- ed and pinned or chinked with slate, and keyed; The bottom fanges of all wrought-iron or rolled steel floor beams, and all exposed portions of such beams below the abutments of the floor shall bo entirely incased with hard burnt clay or porous terra cotta, or with wire metal lath properly secured and plastered on the under side. The exposed sides and bottom plates or fianges of wrought-iron or rolled steel girders supporting iron, steel or wooden floor beams or supporting floor arches or floors, shall be entirely incased in the same manner.
 Sec. 39. All iron or steel lntels shall have bearings proportionate to the weight to be im- posed thereon, but TO llntel used to span any opening more than ten feet i'll width shall have a bearing less than twtlye inches at each end, if resting on wall, but if rest ing on an iron post, such lintel shall have 8 bearing of at least six inches at each end by the thickness of the wall to be supported. IT the posts are to be party posts in front of party wall, and arc to be used for two build
 
 sixteen inches on the face by the thickness of the wall above, and if the party wall be mere than sixteen inches thick, then the post shall be the thickness of the wall on the face. Intermediate posts may be used, which shall be sufficiently strong, and the lintels thereon shall have sufficient bearings to carry tho weight above with safety. When the lintels or girders are supported at the ends by brick walls or piers they shall rest upon cut granite or blue stone blocks at least twelve inches thick, or upon cast-iror plates of equal strength by the full size of the bearings. In case the opening Is less than twelve feet, the stone blocks may be six inches in thickness, Or cast-iron plates of equal strength by the full size of the bearings may be used. This requirement shall not apply to tho cast-ron lntels used at the back of stone lintes over openings not exceeding six feet in width. In all cases where the girder carries a wall and rests on brick piers or walls, the bearings shall be sufficient to support the weight above with safety. No cast-iron lintel or beam shall be less than three-q quarters of an Inch in thick ness In any of its parts. Iron beams or girders used to span openings more than sixteen feet in width, upon which walls rest or upon which floor beams are carried shall be of wrought-iron or rolled steel aud of sufficient strength, or cast-iron arch girders may be used having rise of not less thaa one inch to each foot of span between the bearings. with one or more wrought-iron tie-rrds of suf- fcient strength to resist the th1usts. well fastened at each end of the girder. All lintels
 
 front, rear or side of building, or returned over a corner opening, when supported by brick of stone piers or iron columns, shall be of iron or steel and of the full breadth of the wall supported. In all buildings here- after erected of altered, where any iron or steel columns are used to support wall or part thereof, whether the same be an ex- terior or an exterior wall, executing 8 wall fronting on a street. and columns located be- low the levol of the sidewalk which are used to support exterior walls of arches over vaults, tho said column or columns shall bs either constructed double, that is, an outer and an inner column, the inner column alone to be of sufficientstrength to sustain safely the weight to be imposed thereon, or such other iron or steel column of sufficient strength and so con- structed as to secure resistance to fire, may be used as may be approved by the Inspector of Buildings Iron posts in front of party walls shall be filled up solid with masonry and made perfectly tight between the post and walls to prevent effectually the passage of smoke or fire. Cast-iron posts or columns which are to be used for the support of wooden or iron girders or brick walls, not cast with one open side or back before being set up in place, shall have three-eighths of an inch hole drilled in the shaft of each post or ool- umn by the manufacturer or contractor fur- nishing the same, to exhibit the thickness of the castings; and any ether similar sized hole or holes which the Inspector of Buildings or his duly authorized representatives may re- ullire shall be drilled in the said posts or columns by the said manufacturer or con- tractor at his own expense. Iron posts or columns cast with one or more open sides and backs shall have solid iron plates on top of each to prevent the passage of smoke or fire through them from one story to an- other, excepting where pierced for the pas- sage of pipes. No cast-iron post or column shall be used in nay building of a less average thickness of shaft than three-quarters of an inch, nor shall it have an unsupported length of more than twenty times its least lateral dimensions or diameter No wrought-iron or length of more than thirty times it's least lateral dimension or diameter nor shall its metal be less than one-fourth of an inch in thickness Ali cest-iron, wrought-iron and steel columns shall have their bearings faced smooth, and at right angles to the axis of the column; and when one column rests upon another column, theysshall be securely bolted together Where columns are used 10 support iron or steel girders carrying curtain walls, the said columns shall be of cast-iron, wrought-iron or rolled steel, and on their exposed outer ard inner surfaces be con- structed to resist fire by having casing thickness and bonded into the brick work of the curtain walls or the inside surfaces of the said columns may be covered with an outer shell of iron having an air space be- tween; and the exposed sides of the iron or steel girder shall also be similarly covered in and tied and bonded. When the thickness of the curtain walls is twelve inches the girders for the support of same shall be placed at the floor line of each story, commencing at the line where the thickness of twelve inches starts from, and when the thickness of such walls is sixteen inches the girders shall be placed not farther apart than every lty,o oit