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Stone Specifications

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Standard Practice

Stone and workmanship quality shall be in accordance with industry standards and practices.

Cutting and Setting Drawings

The stone supplier shall prepare and submit to the architect for approval, complete cutting and setting drawings for all of the stone work. Such drawings shall show in detail the sizes, sections, and dimensions of stone, the arrangement of joints, and any other necessary details. All jointing as shown by the architect on the contract drawings shall be followed, unless modifications are agreed upon in writing, or indicated upon the approved shop drawings. If the contract drawings do not show the intent of the jointing, it will be the stone supplier’s responsibility to establish the jointing in accordance with industry standards and practices. The general contractor shall furnish all field dimensions necessary for stone cutting. 

The cutting and setting drawings shall be based upon and follow the drawing details prepared by the architect except where it is agreed in writing or shown on the approved shop drawings that changes be made. Each stone indicated on the setting drawings shall bear the corresponding number marked on an unexposed surface. 
Provision for the anchoring, dowelling, and cramping of work, in keeping with standard practices, and for the support of stone by shelf angles and loose steel, etc., when required, shall be clearly indicated on the cutting and setting drawings. 

Carving and Models

Skilled carvers shall do all carving in a correct and artistic manner, in strict accordance with the spirit and intent of the approved shaded drawings, or from models furnished or approved by the architect.


All stone shall be cut accurately to shape and dimension and full to the square, with jointing as shown on approved drawings. All exposed faces shall be dressed true. Beds and joints shall be at right angles to the face, and joints shall have a uniform thickness of 3/8” unless otherwise shown or noted on drawings.

Repairing Damaged Stone

Repair of stone is an accepted practice and will be permitted. Some chipping is expected. Repair of small chips is not required if it does not detract from the overall appearance of the work, or impair the effectiveness of the mortar or sealant. The criteria for acceptance of chips and repairs will be per industry standards and practices unless the stone supplier and architect mutually agree upon other criteria.

Back-Checking and Fitting to Structure or Frame

Stone coming in contact with structural work shall be back-checked as indicated on the approved shop drawings. Stones resting on the structural work shall have beds shaped to fit the supports as required.
Maintain a minimum of 1” between stone backs and adjacent structure.

Cutting for Anchoring, Supporting and Lifting Devices

No holes and sinkages shall be cut in stones for all anchors, cramps, dowels and other tie-back and support devices unless the contractor makes arrangement for this service with the stone supplier. Expansion anchor holes shall be drilled at jobsite by mason or erector to facilitate alignment. 

No holes or sinkages will be provided for general contractor’s handling devices unless the contractor makes arrangement for this service with the stone supplier.

It is not recommended that Lewis Pins be used for stones less than 3 1/2 “ thickness.

Cutting and Drilling for Other Trades

Any miscellaneous stone cutting necessary to accommodate other trades will be done by the stone supplier only when necessary information is furnished in time to be shown on their shop drawings and details, and when work can be executed before initial stone cutting. Stone cutting and fitting, due to jobsite conditions, will be the responsibility of the general contractor. 
Incidental stone cutting, such as for window frame clips, etc., which is normally not considered to be the responsibility of the stone supplier, will be provided only by arrangement by the general contractor with the stone supplier.

Loading and Unloading

The stone shall be carefully packed for transportation with exercise of all customary and reasonable precautions against damaged in transit. All stone under contract shall be loaded and shipped in the sequence and quantities mutually agreed upon by the general contractor or erector and the stone supplier.

Unloading and Storage at Job Site

All stone shall be received and unloaded at the job site with necessary care in handling to avoid damaging or soiling. Stone shall be stored clear of the ground on non-staining skids (cypress, white pine, poplar, or yellow pine without an excessive amount of resin). Chemically treated wood should not be used. Do not use chestnut, walnut, oak, fir, and other woods

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