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SECTION 15

Marble and Tile Work 1. General.

The Contractor shall furnish all labor, materials, tools, scaffolding and equipment, except as otherwise noted, necessary to entirely complete any or all classes of marble or tile work herein specified, according to the class of building, and as shown or implied on the drawings. 2. Description of Marble.

All marble specified or shown on drawings shall be the best of their several kinds, carefully selected for color, marking and location in the work, and each piece shall be subject to the Engineer's approval or rejection.

Samples eight by twelve (8"x12") inches in size of each kind of marble specified shall be submitted for the Engineer's approval. These samples shall be finished as specified for the work and there shall be separate samples for each finish.

The completed work shall be equal to the approved samples as to quality, color, markings and finish.

3. Thickness.

All marble shall be thick enough to be amply strong for its size and location and no slabs shall be less than seven-eighths (78) inch in thick

ness.

All returns of eight (8) inches or less projection shall be from stock of sufficient thickness to form solid angles without vertical joints, angle pieces may be cut with hand saw, provided the position of joints is not altered from that shown on drawings. All molded or ornamented members shall be from stock sufficiently thick to permit of the finished work being an exact reproduction of the models or drawings without flattening. Projecting angles throughout shall be slightly rounded to prevent the edges chipping. 4. Setting and Anchoring.

All slabs shall be set free from backing surfaces using brick furring on vertical surfaces, and other approved materials elsewhere. All bearing edges shall be bedded solidly and continuously their entire length and no material other than pure plaster of Paris and pure non-staining Portland cement shall be used in setting. Each piece of marble throughout the entire work shall be securely fastened in place with brass or bronze dowels, clamps and tees, which must be provided and used in ample numbers to make a rigid and permanent job. No tees shall be fastened to the marble or walls by cement or plaster only, but each must fit into a properly drilled seat, shaped to retain the setting mortar.

In no case shall any metal fastening show on the exposed faces unless specially mentioned herein or shown on the drawings. Specially made metal fastenings shall be used where necessary, or as may be directed. 5. Finish.

The finishes to be given marble are as follows:

(a) All floors and floor borders, stair treads, risers and landings and door saddles are to be honed.

(b) All marble, except as noted in (a) above, to be highly polished. 6. Joints.

All joints shall be close, showing only a hair line and each piece of marble shall be worked to absolutely perfect edges. The exposed surfaces of all marble shall be worked to true planes so that abutting edges cannot be felt. Any surface dressing necessary to obtain these results shall be continued the full length and width of the piece affected, so that the dressing cannot be felt or seen, and this shall include any dressing required after the marble is set in place. 7. Supports for Marble Work.

The Marble Contractor shall provide and set all steel supports of every description required specially for the proper setting of his work. Wherever this special steel framing is supported on the framing furnished and set by others, the Contractor for the marble shall furnish to such other contractors, within a reasonable time, carefully prepared drawings showing all required framing connections in detail so that provision may be made for the proper construction of the work, without unnecessary cutting and drilling, but if such framing is already in place, the Contractor for the marble work shall do all cutting, fitting and drilling required to properly connect his work to such framing.

All steel supports furnished by this contractor shall be given three coats, one shop coat and two field coats, of approved paint. 8. Floors and Floor Borders.

Wherever floors, floor borders or panel divisions are specified or shown they shall be not less than seven-eighths (78) inch in thickness, and at all openings shall be increased in width to meet the door saddles or tilling pieces, which take the place of saddles. 9. Terrazzo (Monolithic).

Floors are to be divided into panels, as indicated on the drawings. Wherever shown borders of different colored terrazzo are to be run, and panels are to be formed by strips of colored terrazzo.

Floors shall be composed of Portland cement and selected first quality chips of marble. Chips shall be of a reasonable uniform size, perfectly clean and uniformly distributed over the surface, and showing the greatest possible proportion of marble in the finished state.

Wherever terrazzo base is indicated it shall be of the height required above the floor, finished with a one (1) inch radius cove at the intersection with the floor.

10. Terrazzo (Tile).

All rooms so indicated on drawings shall have terrazzo tile floors and base as manufactured by..

..or equal. The pressure used in the manufacture of all tile for the work shall not be less than 2500 lb. to the square inch. All tile shall be 12" x 12" for the field and have a double border. All tile to be not less than one inch (1") in thickness. All rooms having terrazzo tile floors shall have a six-inch (6") terrazzo cove base as detailed. All doors shall have terrazzo plinths in connection with terrazzo base. Tile must be so made that their structure will be free from air bubbles, and when rubbed to a finished surface must present a solid body. No tile, the surface of which has been filled or otherwise treated after rubbing, shall be used. The tile shall be laid in a true and level plane at elevations shown on drawings, in a first class and workmanlike manner. Great care shall be taken to have all lines and spacings true and straight, and all joints of even width, not exceeding one-sixteenth (1/16") of an inch. Provide terrazzo thresholds at all doors in connection with terrazzo tile floors, unless thresholds of other materials are called for.

Tile shall be set on a bed of mortar composed of two (2) parts Portland cement and three (3) parts sand. Tile to be rammed to a solid and even bed, grouted and rubbed.

Before depositing bedding mortar, the entire surface shall be cleaned and well saturated with water to prevent too rapid absorption of water from bedding mortar.

After tile is laid and properly grouted, all tile foors shall be holystoned to reduce inequalities of surface. All tile for floors and base shall be made with marble chips of kind and color selected by the Engineer. Contractor shall submit samples of tile and setting plan for approval before getting out any work.

Contractor shall guarantee all terrazzo work for a period of one year after completion against defects of workmanship or material. 11. Marble for Floors.

Marble floors and floor borders shall be composed of marble tile not less than seven-eighths (78) inch in thickness, cut with full faces, sawn bed, and all edges rubbed to the exact size required.

Each piece of marble shall be set in full bed of Portland cement mortar, and when set, all joints shall butt and match perfectly and closely and shall be perfectly flush. All pieces shall be selected and located in the floor according to character of veinings and color. 12. Vitrified Tile.

(a) On Walls.- Tile for walls shall be salt glazed white tile laid in cement with hair line joints absolutely plumb and true without waves. Where trim of other material is not specified, the tile shall be returned into all riveals and soffits and the angle shall be formed of angle tile with corner rounded to a radius of about one (1") inch. Where tile wainscot

A

is called for there will also be required a sanitary tile base eight (8°) inches high.

(b) Floor Tile.—To be hexagonal or other approved shapes of vitrified tile, set in cement mortar. Border of two (2") inch square tile to be laid at the intersection of floor with base. 13. Beds.

The distance from the finished floor to the rough floor will be not less than two (2") inches and this Contractor shall fill in on top of the rough floors to the desired line with concrete composed of one part Portland cement, two parts sand and four parts crushed stone or gravel to form bed for flooring material. 14. General Conditions.

All materials entering into the work and all methods used by the Contractor shall be subject to the approval of the Engineer and no part of the work will be considered as finally accepted until all the work is completed and accepted.

The General Conditions as given in Section 1 of this specification shall be considered as to apply with equal force to this section of the specification.

Appendix B

ICE HOUSES AND ICING STATIONS

E. CHRISTIANSEN, Chairman;
J. B. GAUT,

F. R. JUDD,
C. W. RICHEY,

Sub-Committee.

This report of Sub-Committe on Ice Houses and Icing Stations is to be considered only a preliminary study on the subject; as a study should first be made of the various arrangements of ice houses and platforms handling natural and artificial ice, either crushed or cake, by both gravity and mechanical methods, and the many conditions which affect the type and arrangement. Ice houses and icing stations do not come in what might be called the "ornate” phase of building construction; but with a little study of proportion and arrangement the result-with the equipment in working order and ice delivered to storage, or from storage to trains. The entire layout moving smoothly-will reward the designer for his efforts.

Icing stations, while not a direct revenue producer, are a necessary facility in connection with the operation of some railways. A dollar well spent will be doubled by saving in operation. As an illustration : Assuming that the selected point for a station having a great amount of icing to be done in a limited amount of time, one could build a gravity system, the cheapest layout known. From an economical operating standpoint this may not be the proper thing to do, as gravity is a slow method of handling ice. There are now on the market many good mechanical appliances which are very effective in handling ice speedily, both crushed and cake, which are flexible to many conditions. In connection with both of these methods of handling ice, there is an element which must be always taken into consideration, namely, that the ice must be always under control, as, once it gets away, there is no way to regain control of it and the result is collision of the cakes, broken ice and loss of money.

Ordinarily, there is not enough thought given to arrangement of rooms and machinery. Poor arrangement will increase the cost of filling a house as much as five or more per cent. Per ton. This also applies to the movement of ice from storage to cars. Some consider the number of rooms an essential point; the larger the number of rooms, the easier to keep things moving smoothly-in fact, the amount of ice that can be harvested is proportionate to the number of rooms--small squads stationed in different rooms being able to take care of ice rapidly in a house of twelve rooms or more, as the workers can be changing skids in two or three rooms and filling in while the rest take the full supply of the elevator. Wide doors are also a help. The doors must be wide enough to admit a chute built so that the ice can run either way, i. e., wider in the clear than the diagonal of the cake. The doorman should be able to switch the ice any way and not have to direct it the

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