price, so that at all times there will be reserved by the Owner sufficient funds to complete the building, in case of default on the part of the Contractor, at usual market rates, and, in addition, 10 per cent. Time of Completion. The time limit for the completion of the work shall be (nine months from the date of award of contract; and it shall be a condition of the contract, that there will be deducted from the final payment the sum of fifteen dollars ($15.00) as liquidated damages for each day's delay after the expiration of such period, until the final acceptance of the work by the Architect and its delivery to the Owner. Protection of Lot. Put a tight board fence 5 feet high, with three 2- by 4-inch rails, and with 4- by 4-inch posts set 6 feet on centers, which will protect adjoining property from encroachment during building operations. On the street side, and in front of the spot to be occupied by the building on the avenue, enclose such portion of the roadway as is permitted by the city building ordinance to be used in building operations; build also such fence, and place such walks as are required by such ordinance. On the site is one oak tree, and in the street two elm trees. These are to be protected by tree boxes of 2-inch plank and 2- by 4-inch cleats, with such holes cut on sides as will permit a full circulation of air about the trunk; under no circumstances are any guy ropes to be secured to, or allowed to interfere with, any portion of the trees. There will be no attempt to save any of the sod or shrubs now on the site, and the Contractor will be allowed all the space for piling material, etc. The protection by the Contractor, of trees, sidewalk, curb, adjoining property, etc., as required hereinafter, shall not relieve the Contractor from responsibility for any injury which may occur to such protected items on account of the building operations. EXCAVATION Disposition of Excavated Materials. Four test pits have been dug to a point one foot below the bottom of all footings; and bidders should visit the site and examine the conditions. The black soil which constitutes the top stratum is all to be piled on the lot, wherever the Contractor desires, so long as it is not against the oak tree. Below the black soil is a stratum of sand which is satisfactory for concrete and cement mortar; below this is coarse gravel which may be used for concrete, provided all stones which will not pass through a 2-inch ring are cracked to such size. Any other material to be taken from the excavation is worthless, and must be hauled away. The excavation is to be carried on so that different strata will be kept in separate piles. Any materials mixed so as to make it undesirable in the opinion of the Architect to use them for the purposes above designated, are to be hauled away. Shoring. The curbstone in place is to be protected by sheet piling driven down just back of the inside of curb line so that there will be no settlement or shifting before the supporting wall is completed. The other sides of the excavations are to be sloped enough to prevent caving. The excavation is not to go below the party wall of the adjoining building. All excavations for footings must be complete before any footings are placed. Backfilling. After all foundation walls are completed and thoroughly set, backfilling is to be done with sand or gravel. Sewer and Water Connections. The sewer and water have already been brought to the site. The sewer terminates at a brick manhole, 3 feet 6 inches inside diameter, with iron cover, at grade about 5 feet from the side line of the building; and temporary connections with this manhole are to be made, so that there shall be at no time any standing water in the excavation, should it develop that the gravel is a water-bearing stratum. The water connections will be encountered, in making the wall at the curb line, about 4 feet below grade. MASONRY Materials Required Cement. All cement is to be Portland cement, of such fineness that 90 per cent will pass through a 100-mesh sieve. The initial set shall be in not less than 30 minutes; and pats of neat cement, about 3 inches in diameter and 11⁄2 inch thick in center, worked off to a thin edge, which has been exposed in air or immersed in water for seven days, after the cement has set sufficiently not to be disintegrated by water, shall show no discoloration, warping, checks, or signs of disintegration. Sand. The sand shown to be on the site by the test pits is of sufficiently good quality for all masonry mortar except wearing surface of pavements, steps, etc. Should there not be enough thus obtained, that brought in must be as clean and sharp as that found in excavating. The sand for all wearing surfaces, such as walks, steps, and cellar and area floors, down for at least 1/2 inch, is to be crushed granite, ranging from the finest material to that which will pass a 30-mesh sieve. Broken Stone. The gravel stratum may be used for concrete aggregate, provided the sand and all stone too large to pass a 2-inch ring are screened out. The sand may be used with other sand on the site, and the stone screened out be broken to size required; the other material needed shall be equal to that obtained on the site, and the Contractor shall not dig holes below the finished grade lines to obtain material. Brick. Common Brick. All common brick are to be run of the kiln, excluding salmon brick, which will take up during one hour's immersion in water as much as 18 per cent of their weight in water. As delivered, the hardest are to be kept in piles for use in backing exterior walls and flues; the softer are to be put in interior walls. Facing Brick. All facing brick are to be of light color and rough face texture; evenness of tone or burning will not be required; and the light and dark tones will be laid together, with no attempt to keep the same tones together; but no brick shall be allowed which is soft enough to absorb over 12 per cent of its weight in water. The facing brick are to have full square edges, free from chipped corners. Granite. The exterior wall below water table, and the front steps and buttresses, are to be of granite. All granite is to be of light color, free from black knots, and is to be finished 4-cut work. The joints are to be 3 inch wide, and tooled back full for 1 inch from exterior surface. The stones may be as thin as economical dressing will permit. Soft Stone. From water table up to the line of the secondstory window sills, all stone required is to be a light limestone or sandstone with a 4-bat-to-the-inch finish (consisting of 4 concave grooves to each inch, made either by hand or by machine) for all vertical surfaces. All other surfaces shall be rubbed. The stone must be of an even texture, free from seams or streaks. Should any material used show in a rubbed block any grain from which the natural bed can be determined, it is to be set so that it will rest on its natural bed; but if the stone is of such character as to show no such indications, it will be immaterial whether or not it rests on its natural bed. The ashlar may be as thin as 4 inches, except where reveals or corners occur. At reveals the heads are to be the full depth; and no vertical joint in the face of the wall is to be nearer the reveal than 1 foot, while all caps and sills are to be the full depth. Terra Cotta. Structural. The interior faces of all exterior brick walls are to be furred with 2-inch porous terra cotta of such quality that a nail can be driven therein without splitting, and firmly held. All flues are to be lined with hard-burned non-porous flue linings, at least 3/4 inch thick. Ornamental. All ornamental terra cotta for cornice and balustrade is to have a color similar to the lighter tones of brick, with a combed surface forming about 6 ribs to one inch. The terra cotta is to be hard-burned, with capacity to absorb not over 4 per cent of its weight of water after immersion for one hour. All approximately horizontal surfaces are to be made rough, to key the cement coat which it is proposed to put above. The finished pieces are to be straight and unwarped, and in lengths never less than 2 feet 10 inches for continuous members; in projecting members, all vertical joints must occur over bearings. All members with less than 2-feet face must be in one piece. The Contractor must furnish shop drawings for approval of jointing only; no outlines are to be modified thereby, and such changes in the jointings may be made, within the lines previously laid down, as in the judgment of the Architect will better the construction or appearance of the work. Masonry Construction Concrete Work. The concrete work of all footings and exterior foundation walls below grade, shall be composed of 1 part Portland cement, 4 parts sand, and 7 parts screened gravel or broken stone. In order to make these proportions efficient, it will be necessary, in mixing and applying the materials, to use great care. The Contractor, under direction of the Architect, shall construct a cube of the mixture about 18 inches square, to show its possibilities when carefully manipulated; this standard shall be the one by which the work will be judged, and any portion of the concrete work which falls below this standard will be condemned. The sand and cement must first be thoroughly mixed dry, turning it over at least four times if no machine is employed, so that no uncolored particles of sand can be detected; after which, just enough water is to be added to dampen the mass thoroughly. The aggregate is then to be mixed in, wet. Walls. It will be necessary to place plank forms for all footings and walls; the concrete is to be put in such forms, and thoroughly rammed. A smooth surface like a spade is to be forced down, just inside the planking, to force the aggregate back from both faces of the wall until clear motar only shows. The walls of each portion are to be carried up the full height rapidly, and the planking to be so arranged that it can be removed from any part within two days after the placing of the concrete. Both faces of the wall are to be finished smooth with a trowel, the surface being so compressed as to make it proof against ground moisture. Basement Floor. After the lining of the first floor has been laid, the basement floor is to be put in. On the base of concrete 3 inches thick, composed as for footings, put, before it has set, a wearing surface 1/2 inch thick, composed of 1 part cement to 3 parts crushed granite, troweled to a smooth, level surface. Beams and Slabs over Sidewalk Cellar. Reinforced concrete beams and slabs over the sidewalk coal cellar, are to be composed of 1 part Portland cement, 3 parts sand, and 5 parts gravel or broken stone which will pass through a 34-inch ring. This is to be tamped in the forms and around the reinforcing metal, to form a solid, compact mass. As the strength of this slab is dependent principally on the care in mixing the material and in placing it, it must be tested three weeks after it is set, by placing five layers of brick over the entire surface. If under this test it fails or cracks, it is to be removed and replaced at the Contractor's expense. Sidewalk. After the completion of the building, a sidewalk, in all respects matching that now in place, is to be continued over the concrete slab, and the iron coalhole cover frame is to be built in so as to set flush with the surface. Brickwork. Rough Brick Walls and Chimneys. The rough brick partition walls in basement, and all chimneys and the backing of all exterior walls, shall be laid and thoroughly imbedded in Portland cement mortar, 1 part cement to 4 parts sand; all brick are to be thoroughly drenched before being laid. In backing up stonework, the brick is to be so bonded that it can be brought up approximately level with the top of each stone course; there is to be placed in every horizontal stone joint a sheet of No. 24 expanded metal, extending to within 1 inch of the face of the stone and through the full thickness of the brick wall. This is to be free from rust, and at once imbedded in the mortar joints of stone and brick to form a reinforced concrete bond. Every fifth course of rough brick is to be of headers. Where rough brick walls will be exposed to view, the joints shall be trowel-pointed and all mortar kept off the face. Chimney Openings in Wall and Fireplace. At the base of ash pits, set doors 8 inches by 12 inches. At the base of chimney flues, set doors 6 inches by 8 inches. In each fireplace hearth, there is to be a small cast-iron ash dump with cast-iron frames built in and anchored. Terra cotta pipe thimbles are to be built in, 1 foot from the faished ceilings, as follows: 1-8-inch thimble in heater cellar 1-6-inch thimble in kitchen |