Loading...
The design for all buildings and other structures shall conform to good engineering practice. The following table gives the minimum uniform live loads in pounds; a square foot which shall be used in the design of buildings, except that the specified live loads (but not the roof or sidewalk loads) may be reduced by 20% in buildings of fireproof construction.
(A) Theaters, assembly halls and other places of assemblage.
(1) Auditoriums, with fixed seats 70 lbs.
(2) Auditoriums or places of assemblage without fixed seats100 lbs.
(3) Lobbies, passageways and stairways 100 lbs.
(4) Dance halls 100 lbs.
(5) Theater stage 50 lbs.
(B) School buildings, libraries and museums.
(1) Class rooms and rooms for similar use 60 lbs.
(2) Corridors, lavatories and similar public parts of the building 80 lbs.
(C) Hotels, dwellings, apartment and tenement houses, club houses, hospitals and places of detention.
(1) Dwellings 0 lbs.
(2) Private rooms and apartments 40 lbs.
(3) Public corridors, offices, lobbies, dining rooms, and the like 80 lbs.
(D) Office buildings.
(1) First floor 100 lbs.
(2) Corridors and other public places above the first floor 80 lbs.
(3) Office space above the first floor 30 lbs.
(4) Grand stands 100 lbs.
(5) All stairs 100 lbs.
(E) Garages.
(1) All types of vehicles 100 lbs.
(2) Passenger cars only 80 lbs.
(F) Workshops, factories and mercantile establishments.
(1) All Not less than 100 lbs.
(In warehouses, workshops, factories and mercantile establishments for the sale, storage or manufacture of heavy merchandise or machinery the floors shall be designed to carry all loads safely, including the allowance of at least 25% for vibration where vibration occurs.)
(G) Roofs and sidewalks.
(1) Roofs 30 lbs.
(2) Sidewalks 250 lbs.
(Where the maximum floor load is more than 250 pounds to a square foot, the sidewalk abutting the building must be designed to carry safely such maximum load.)
(H) Other loading. Concentrated, partial and eccentric loading shall also be provided for.
(I) Reductions. Except in buildings for storage purposes the following reductions in assembled live loads are permissible in designating the columns, piers, walls, foundations, trusses and girders. Reduction of total live loads carried:
(1) Carrying one floor 0%
(2) Carrying two floors 10%
(3) Carrying three floors 20%
(4) Carrying four floors 30%
(5) Carrying five floors 40%
(6) Carrying six floors 45%
(7) Carrying seven or more floors 50%
(J) Wind pressure. Buildings and other structures shall be designed to resist a horizontal wind pressure of 20 pounds on every square foot of surface that is exposed, in addition to the dead loads and live loads specified above.
(K) Anchoring. If the overturning moment due to wind pressure exceeds 75% of the moment of stability of the structure due to dead load only, the structure shall be anchored to its foundation, which shall be of sufficient weight to insure the stability of the structure. Sufficient diagonal bracing or rigid connections between the uprights and horizontal structure members shall be provided to resist distortion.
('72 Code, § 151.025) Penalty, see § 10.99
Any grain elevator building or ice house may be constructed of wood if the exterior walls and roof are covered by an envelope of incombustible material and if the first story walls of grain elevators are built of masonry not less than 20 inches thick or reinforced concrete not less than 12 inches thick. The structure above the first story shall be anchored to such wall with 3/4 inch bolts embedded not less than two feet in the masonry or concrete and spaced not more than two feet in the masonry or concrete and spaced not more than six feet apart. Each corner of the structure shall be further reinforced with iron rods not less than one inch thick in diameter extending from above the roof plate to and into the first story wall to a depth of not less than 60 inches. The roof plates shall be fastened down with nuts and washers. All window frames and sashes in the super structure shall be of metal. The openings shall be protected by wire grating of number 14 gauge, with meshes not exceeding 1/2 inch. The openings in the body of the building and in the engine house shall have suitable metal shutters.
('72 Code, § 151.024) Penalty, see § 10.99
Any building or structure intended to be used wholly or in part as a theater, auditorium, a public garage or school shall be constructed according to specifications for fireproof construction hereinafter set forth. Any building intended to be used as a hospital and which is more than one story in height shall be of fireproof construction; and any building to be used for the storage of explosives or flammable liquids or for storing nitrocellulose, or for dry cleaning establishment, foundry or coffee roaster shall be fireproof construction.
('72 Code, § 151.021) Penalty, see § 10.99
(A) Masonry is that form of construction in which non-combustible masonry units such as stone, brick, concrete block, or tile, hollow clay tile, gypsum block, or other similar building units or materials or a combination of these materials, are laid up unit by unit and set in mortar. The minimum permissible thickness of walls and partitions of masonry, and the quality of those materials shall conform to the American Standard Testing Materials Requirements for Masonry, Bulletin No. 3-145, 1940 edition, and Bulletins C-90 and C-129 of 1952 edition, published by the National Bureau of Standards of the United States Department of Commerce.
(B) Masonry bearing walls, party walls, fire walls, fire division walls, exterior panel walls, inclosure walls or curtain walls, eight inches or less in thickness must be laid in portland cement or cement-lime mortar as defined in this chapter.
('72 Code, § 151.030) Penalty, see § 10.99
(A) Portland cement shall conform to the standard specifications and tests for portland cement adopted by the American Society for Testing Materials, published in pamphlet form as C150-52.
(B) Steel used as reinforcement for concrete shall conform to the standard specifications and tests for portland cement adopted by the American Standards Society for Testing Materials, “Standards on Cement,” 1952 edition.
('72 Code, § 151.028) Penalty, see § 10.99
All buildings, including single-family dwellings hereafter erected, shall be provided with at least two means of egress from the building, as far from each other as the plan of the building will permit, or by a doorway in a fire wall leading to another floor area which is provided with adequate stairs or other independent means of exit. No part of a floor shall be more than 100 feet from an exit.
('72 Code, § 151.039) Penalty, see § 10.99
(A) Monolithic concrete walls having less than .02 of 1% of reinforcing steel shall be considered as plain concrete and the thickness of single bearing walls of plain concrete shall be in accordance with the recommendations in the report of the American Standard Building Code Requirements for Masonry, 1952 edition.
(B) Subject to the requirements in other parts of this chapter, reinforced concrete bearing walls shall have a thickness of not less than six inches for the top story with the thickness of succeeding lower stories including basement, increasing at the rate of one inch for each two stories.
(C) In such walls the amount of reinforcement shall be at least .02 of 1% in each direction, horizontal and vertical, the steel being equally distributed on each face of the wall within a maximum bar spacing of 24 inches.
(D) The combined thickness of the separate parts of double or triple monolithic walls shall be not less than that required for single walls, and no single section of a double or triple wall shall be less than four inches thick. The sections shall be tied together with 3/8 inch round or square galvanized or tar-coated rods, with two-inch hooks at each end, the rods to be spaced not more than 18 inches horizontally and vertically.
(E) Exterior panel walls supported at each story of skeleton construction buildings shall not be less than five inches thick of reinforced concrete.
('72 Code, § 151.031) Penalty, see § 10.99
(A) Portland cement mortar used in laying up masonry shall be mixed in the proportion of one part of portland cement to not more than three parts of sand by volume.
(B) Hydrated lime or lime putty may be added not to exceed 15% by volume of the portland cement used.
(C) Cement-lime mortar shall be mixed in the proportion of one part of hydrated lime or lime putty to not more than six parts of sand by volume.
(D) Lime mortar shall be mixed in the proportion of one part of portland cement added to the amount of 15% of the volume of the lime.
('72 Code, § 151.027) Penalty, see § 10.99
Openings in party or fire walls shall be provided with self-closing fire doors or with positive means of closing the openings to prevent the passage of fire. Doors in fireproof stair and elevator shaft enclosures and coverings for hatchways in floors of all buildings shall be self-closing.
('72 Code, § 151.036) Penalty, see § 10.99
Proportioning of the various load carrying parts of buildings and structures shall be governed by working stresses conforming to good engineering practice as set forth in the 1955 edition of the Building Code Recommendation by the National Board of Fire Underwriters except in cases where the recommendations are in conflict with the specific requirements of this chapter.
('72 Code, § 151.026) Penalty, see § 10.99
No private garage shall exceed 14 feet in total height, and no garage shall be constructed within 20 feet of the front lot line.
('72 Code, § 151.034) Penalty, see § 10.99
The stair and elevator shafts of all buildings except private dwellings, hereafter erected more than two stories high, shall be enclosed continuously by incombustible material, consisting of reinforced gunite not less than 2½ inches thick, or of solid portland cement plaster not less than 2½ inches thick on metal lath and metal frame or of reinforced concrete not less than three inches thick, or of any fireproof material or construction that will pass the standard fire test of the Underwriter's Laboratories of a period of at least two hours. The thickness must in all cases be sufficient to give rigidity.
('72 Code, § 151.038) Penalty, see § 10.99
Each bedroom shall have a window area of not less than 1/10 of the floor area.
('72 Code, § 151.033) Penalty, see § 10.99
Loading...