The daily morning journal and courier., 1897-12-22
(continued from Tenth page.l


 pounds per square Inch for steel, and 10000 pounds per square inch for iron; shearing stress In web 10000 pounds per square inch TOT steel, and 5000 pounds per square Inch TOT iron, but no web plate shall be less than one-quarter of an inch in thickness Riveted plate girders shall be proportioned upon the snpposition that the bending or fang strains are resisted entirely by the upper and lower nanges, and that the shearins strains are resisted entirely by the web-plate. No part of the web shall be estimated as tiange area, nor more than one-haf of that portion of the angle iron which Hes against the web. The distance between the centers of gravity of the tange areas shall be considered as the effective depth of the glrder. Rivets in plate girders sha not be less than three- quarters of an inch in diameter, and shall not be spaced more than six inches apart in any case.
 The maximum stress per square Inch of rivet area (s!ns!e sheart sha!! not exceed tho following for all kinds of riveted work, name ly:-For shop driven riyets O,0p0 pounds for steel, and 7.b00 pounds for Iron, and for field driven rlvets 7,b0o pounds Tor steel, and COCO pounds for iron. The maximum direct bear ins for rivete and pins shall not exceed 1000 pounds per square inch.
 Sec. 4l. Berore any girder. as before men toned, to be used In any building, shall be so used, the architect or tke manufacturer of or contractor for 1t shau if required so to do by the Inspector of Buildings, submit for Ills examination and approval a diagram show inE the loads to be carried by said glrder, ana the strains produced by such load and also showing the dimensions of the materials Of which said sirder Is to be constructed 70 provide for the said strains; and the manu- facturer or contractor shall cause to be mark ed up said girder In & conspicuous place, the weight said girder will sustain and no greater weight than that marked on such girder shall be placed thereon. Before any iron or steel beam, hntel or girder intended to span au opening over ten feet in length in any build ing, shall be used for supporting Q wall, the manufacturer fOuuHar thereof Of said building, shall have the said beam, iintel or girder inspected. In case any iron or steel beam, girder or Intel, or any iron or steel column, shall be rejected by said Inspector as unfit or insufficient to be used for the purposes proposed, the same shall not be used for such purpose in Or upon or about any building or part thereof. All Iron work or steel work used in any building shall be of the best material and made In the best manner, and properly painted with oxide of iron and linseed oil paint before being placed in position, or coated with some other equally good preparation, or suitably treated, for preservation against rust.
 Sec. 42. All wooden beams or other timbers in the party walls of every building built of stone, brick or iron, shall be separated from the beam or timber entering in the opposite side of the wall by at least four inches of solid mason work. No wooden floor beams nor wooden roof beams used in any building, eXcesd'ug three stories in height, hereafter erected, shall be of & less thickness than three
 
 shall net be less than one inch thicker than the floor or roof beams on the same tier, where the header is four feet or less in length; and where the header Is more than four feet and not more than fifteen feet in length the trim mer and header beams shall be at least double the thickness of the floor and roof beams or shall each be made of two beams form ing such thickness properly spiked or bolted together, and when the header is more than Hfoeen feet in length Wrought-iron fitch plates of proper thickness and depth shall be placed between. two wooden beams suitably bolted together to and through the iron plates in constructing the trimmer and header beams; or wrought-iron or rolled steel beams of sufficient strength may be used. Every wooden beam, except header and tail beams, shall rest at one end four inches in the wall, upon girder as authorized by this title. All wooden floor and wooden roof beams shall be properly bridged with cross bridging and the distance between bridging or between bridging and walls shall not exceed eight feet. Every wooden header or trimmer more than four feet long, used in any building, shall be hung 1T stirrup-rons of suitable thickness for the size of the timbers or joist hangers approved by the Inspector Of Buildings. No timber shall be used in any wall of any build ing where stone, brick OF iron Is commonly used, except lintels, as hereinbefore provided. Tho ends of all wooden floor and roof beams where they rest on brick walls shall be cut to a bevel of three inches on their depth, so that in case of fire they may fall without injury to the walls. All wooden beams shall be trimmed away from the flues, whether the same be smoke, air or any other fue the trimmer beam to eight inches from the inside face of a fue in straight way and four inches from the outside of chimney breast, and the header two inches from the outside face of the fue. All freplaces shall have trimmer arches to support hearths and the said arches shall be at least sixteen inches in width, measured from the face of the chim- ney breast, and at least one foot longer on each side than the width of the fireplace open ing, and they shall be constructed of brick stone or burnt-clay. Wooden centering under trimmer arches shall be removed before clustering the ceiling underneath. Each tier of beams shall be anchored to the side, front rear or party walls at intervals of not more than six feet apart, with good strong wrought-iron anchors of not less than one and a half inches by three -eighths of an inch iD size well fastened to the side of the beams by two or more nails made of wrought iron at least one-fourth of an inch in diam- eter. The ends of beams resting upon grders shall be butted together, end to end, and strap ped by wrought-iron straps of the same size and distance apart and in the same beam as the wall anchors, and shall be fastened In the same manner as said wall anchors, or they may lap each other at least twelve inches and be well spiked or bolted together where tapped. Where the beams are supported by grders, the girders shall be anchored to the walls and fastened to each other by suitable iron straps Every pier and wall front or rear shall be well anchored to tho beams of each story, with the same size anchors as are required for side walls, which anchor shall hook over the second beam. Each tier of beams front and rear, opposite each pier, shall have hard wood or Georgia pine anchor strips dove-tailed into the beams dagonally, which strips shall cover at least four beams, and be one inch thick and four inches wide, but no such anchor strips shall be let within four feet of the center line of the beams or wooden strips shall be nailed on the top of the beams and kept in place until the floors are being laid Wooden columns supporting wooden girders and wooden floor beams and wooden roof beams, in all buildings more than two stories in height, shall each have cap and base plates of iron not less than one inch thick, and of proper size and shape. Said wooden columns, when placed one over another shall not bear upon any wooden girdor, but shall bear directly upon each other or shall have between the iron plates suitable iron dawels passing through the glrders. All timbers and wood beams used in any building shall be of good sound ma terial free from rot, large and loose knots, shakes or any imperfection whereby the strength may be impaired, and be of such size and dimensions as the purposes for which the building is intended require.
 Sec. 43 All ohimneys shall be built of brick, stone or other incombustible materials.
 Chirnneys in all buildings shall have walls at least eight inches thick, If of brick unless terra cctta or fTe-clay Hue Things are used. in which case four inches of brick work may be omitted. Chimneys other than those built of brick shall have walls at least eight inches thick and shall have an additional lining of four inches of brick work q terra cOtta or fre.rlay lining. Said fuo lining shall start