380. - Granite

All trimmings colored blue on the elevation drawings to be of (Quincy) granite. The stock to be carefully selected and free from all natural imperfections, such as mineral stains, sap or other discolorations; to be of an even shade of color throughout, so that one stone shall not look of a different shade from another when set in place.

The face of sills, caps, quoins and water table, where so indicated on the elevation drawings, to be pitched face, with 1-inch angle margin on the quoins and water table. All steps and thresholds to be hammered work, six-cut, and the balance of the trimmings to be best eight-cut work.

Sandstone. - All trimmings shown by brown color on the elevation drawings to be of best quality selected (Cleveland) buff sandstone, of uniform color and hardness, free from sand holes and rust, and cut so as to lay on its natural bed when set in the wall. All stone trimmings thus shown are to be worked in strict accordance with the detail drawings, with true surfaces and good sharp, straight lines; and all stone belts, unless otherwise provided for, are to have a bearing upon the walls of at least (6) inches, and the projecting courses to have a bearing of 2 inches more than the projection. All exposed surfaces of the sandstone are to be carefully tooled, (rubbed) or (crandalled), the workmanship being regular and uniform in every part and done in a skillful manner. All mouldings to be carefully fitted together at the joints, and no horizontal or vertical joint to exceed 3/16 of an inch. All return heads at the angles, etc., are to be at least (12)" inches. No patching of any stone will be allowed.

[Ordinary soft sandstones, or "freestones," are not suitable for steps and door sills, which should be either of granite or some hard sand or limestone.]

Ashlar. - The (south) and (west) walls of the building where exposed above the (water table) are to be faced with coursed (broken) ashlar of the same stone as specified for the trimmings. The ashlar to be in courses (12) inches high, except as otherwise shown on elevation drawings, and to have plumb bond wherever practicable. (The surface of the quoins to be raised 1 inch from the face of the wall, with beveled or rusticated joints, and the faces of the stones to be rusticated in a skillful manner. Each quoin to be (16)x(24) inches, reversed as shown on drawings.) The balance of the ashlar to be rubbed to a true surface, without wind, cut to lie upon its natural bed, and for 3/16-inch joints. No stone to be less than 4 inches thick, and at least one jamb stone to each opening to extend through the wall. All mullions 16 inches or less in width to be cut the full thickness of the wall.

The contractors, both for the granite and sandstone, are to do all drilling, lewising, fitting and other jobbing required for setting the stone or to receive iron ties, clamps, etc., and are to provide all patterns necessary and required for the execution of the work.

Setting Stonework. - [The specifications should distinctly state who is to set the stonework. If the stonework consists of a few trimmings only it will be cheaper for the brick mason to set it, but if there is much stonework it should be set by the stone mason.]

All stonework shown by blue or brown color on the elevation drawings, and as previously specified, is to be set in the best manner by this contractor in mortar mixed in the proportions of 2 parts of (Rockland) lime mortar and 1 part fresh (Rosendale) cement. The cement to be mixed with the lime mortar in small quantities and in no case shall any be used that has stood over night. (For setting limestone and marble see Section 208.)

As the stone is delivered at the building the mason will accept the same and be held responsible therefor until the full completion of his contract; any damage that may occur to any stone, whether on the ground or in the building, during the said period, shall be made good at his own expense and to the satisfaction of the architect or superintendent.

The mason must call upon the carpenter to box or otherwise protect by boards all steps, mouldings, sills, carving and any other work liable to be injured during the construction of the building.

Every stone to be carefully set, joints left open under centre of sills and at the outer edges of all stonework, and all stones to be uniformly bedded, joints kept level and plumb and of uniform thickness. The mason is to provide derricks and all other apparatus necessary to set the stone properly, and is to carry on the work so as not to delay the other mechanics. Where the stone is backed up with brick the stone shall not be set more than two courses ahead of the backing.

Anchors and Clamps. - This contractor is to provide all necessary iron anchors and clamps (which are to be galvanized or dipped in tar) for securing the stone as herein specified or as directed by the superintendent.

Each piece of ashlar 12 inches or more in height is to have one iron anchor extending through the wall, and when exceeding 4 feet in length two clamps are to be used. (Broken ashlar will be bonded by through stones, one to every 10 square feet of wall.) Also anchor all projecting stones, corbels, finials, etc., with iron anchors satisfactory to the superintendent. All coping stones and other horizontal string courses or cornices, where so indicated by notes on the drawings, are to be clamped together.

Cleaning and Pointing. - After all the stonework is set complete (and the roof is on) the mason shall scrub down with muriatic acid and water, using a stiff bristle brush, all stonework, rake out all joints to the depth of 1 inch and repoint with Portland cement and (Clinton) red, well driven into the joint and rubbed smooth with the jointer with half round raised joint as per marginal sketch. (It will be well to show in margin the kind of joint desired; see also Section 209).

The entire work to be left clean and perfect on completion of the contract.