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Mortar. Mortar for use in masonry construction shall conform to ASTM C and Articles and A of TMS. /ACI /ASCE 6, except for mortars . Specifications for masonry structures: ACI /ASCE /TMS with ASTM references. Imprint: Detroit: American Concrete Institute, c 5/TMS , and its accompanying masonry specification, ACI /ASCE 6/TMS New provisions and revisions of existing standards for masonry design.

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Stone masonry units shall conform to the following standards: The cleanout shall be provided with a noncombustible cover. The lining in chimneys shall not be considered as taking either compression or tension stresses. Any such appliances shall be listed and labeled and shall be installed in accordance with the terms of the listing. The results of such test run shall be certified as correct by the design professional engineer responsible for the test and shall be submitted in writing to the department.

Old mortar shall be cleaned from the unit before reuse. All non-participating masonry walls and veneers shall be constructed with adequate depth and width of isolation joints to prevent masonry distress induced by deflections, drifts. Concrete masonry units shall conform to the following standards: Grout shall comply with Article 2. However, such construction does not include other chimneys, vents or open structural framing. Concentrated loads shall be supported upon construction of solid masonry, concrete, or masonry of hollow units with cells filled with mortar, grout, or concrete.

C shall extend at least 20 feet mm above the highest construction, such as roof ridge, parapet wall, penthouse, or other obstruction within 50 feet 15 mm of the chimney outlet, whether the construction is on the same building as the chimney or in another building. In no case shall the length of the lapped splice be less than 40 bar diameters. A built-up construction or combination of building units or materials of clay, shale, concrete, glass, gypsum, stone or other approved units bonded together with or without mortar or grout or other accepted method of joining.

Solid construction for support under beams, girders, or other concentrated loads shall be at least 4 inches mm in height, and the bearing of beams shall extend into the masonry at least 4 inches mm.


Masonry or concrete fireplaces shall be constructed, anchored, supported and reinforced as required in this chapter. The outlet shall be closable and designed to prevent burning material from dropping into concealed combustible spaces.

» N.Y. New York City Administrative Code C21 – – MasonryLawServer

Such responsibilities shall then be assumed by the owner of the previously constructed building. Any existing violations on the previously constructed equipment shall be corrected by the owner of the equipment before any equipment is added or alterations made at the expense of the owner of the new or altered building.

Smoke chamber walls shall be constructed of solid masonry units, hollow masonry units grouted solid, asve or concrete. Since the Code is written as acj legal document and the Specification as a master specification required by the Code, the two commentaries present background details, committee considerations, and research data used to develop the Code and Specification.

A connector that connects wythes of masonry walls together. A plastic mixture of approved cementitious materials, fine aggregates and water used to bond masonry or other structural units.

Masonry composed of unsquared field stones laid without regularity of coursing but well-bonded. C during intermittent forces firing for periods up to 1 hour. Where the floor extends on both sides of a bearing wall, ascf portion of the tie within the slab shall alternate between both sides.

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Mortar shall not be substituted for grout where grout is specified on the construction documents. The design of the end connections shall ensure the transfer of such loads to horizontal or vertical ties. Masonry and concrete chimneys in Seismic Design Category C or D shall be anchored at each floor, ceiling or roof line more than 6 feet mm above grade, except where constructed completely within the exterior walls. The applicant of record shall submit an engineering analysis establishing that proposed building horizontal joints spaced further apart than in The Specification covers subjects such as quality assurance requirements for materials; the placing, bonding and anchoring of masonry; and the placement of grout and of reinforcement.

The fireplace throat or damper shall be located a minimum of 8 inches mm above the top of the fireplace opening.

The minimum thickness of fireplace hearths shall be 4 inches mm. The following requirements shall be met for walls, columns and piers:. Appears on pages s: Each continuous, vertical section of ascr wall, one masonry unit in thickness. Intermediate reinforced masonry shear wall.


The units shall be of whole, sound materials and free from cracks and other defects that will interfere with proper laying or use. Steel fireplace units incorporating a steel firebox lining tme be constructed with steel not less than Y4-inch 6. Masonry chimneys shall be lined. Allowable stresses not specified in Table The minimum level of testing and inspection as defined in Chapter 17, or an itemized testing and inspection program t,s meets or exceeds the requirements of Chapter The aasce wythes shall be at least 4 inches mm thick and bonded into the walls of the chimney.

Flue linings other than those covered in Section ascr That form of grouted masonry construction in which certain designated cells of hollow units are continuously filled with grout. Where necessary, support such extended chimneys, vents and equipment from this building or to carry up such chimneys or vents within his or her building; and 4.

An isolated vertical foundation member whose horizontal dimension measured at right angles to its thickness does not exceed three times its thickness and whose height is equal to or less than four times its thickness. C under normal operating conditions, but capable of producing combustion gases of 1,? Reclaimed units shall not be used. Masonry walls that are not part acj the lateral force resisting system shall be isolated from the structure so that the vertical and lateral forces are not imparted tmms these elements.

62 areas not subjected to freezing, footings shall be at least 12 inches mm below finished grade. Factory-built or masonry fireplaces covered in this section shall be equipped with an exterior air supply to ensure proper fuel combustion unless the room is mechanically ventilated and controlled so that the indoor pressure is neutral or positive.

The vertical reinforcement shall be terminated in a horizontal tie or foundation or their equivalent. The upper edge of the cleanout shall be located at least 6 inches mm below the lowest chimney inlet opening. A field-constructed chimney of solid masonry units or stones.