Sec. 489. Smoke Flues Lined With Cast Iron

In all buildings hereafter erected every smoke flue shall be lined on the inside with cast iron or well-burnt clay or fire-proof terracotta pipe from the bottom of the flue, or from the throat of the fireplace, if the flue starts from the latter, and carried up continuously to the extreme height of the flue. The ends of all such lining pipes shall be made to fit close together, and the pipes shall be built in as the flue or flues are carried up. Each smoke pipe shall be inclosed on all sides with not less than four inches of brickwork properly bonded together.

Sec. 491. Iron Shutters

Every building which is more than two stories in height above the curb level, except dwelling-houses, hotels, school-houses and churches, shall have doors, blinds or shutters made of iron hung to iron hanging frames or to iron eyes built into the wall, and on every window and opening above the first story thereof, excepting on the front openings of buildings fronting on streets which are more than thirty feet in width; or the said doors, blinds or shutters may be constructed of pine or other soft wood of two thicknesses of matched boards at right angles with each other, and securely covered with tin, on both sides and edges, with folded lapped joints, the nails for fastening the same being driven inside the lap. The hinges and bolt, or latches, shall be secured or fastened to the door or shutter after the same has been covered with the tin, and such doors or shutters shall be hung upon an iron frame, independent of the woodwork of the windows or doors, or to iron hinges securely fastened in the masonry; or such frames, if of wood, shall be covered with tin in the same manner as the doors and shutters. All occupants of buildings shall close the shutters, doors and blinds of the rear and side windows and openings; and where front shutters are provided, shall also close such shutters at the close of business. All shutters opening on fire escapes, and at least one row, vertically, in every three rows on the front window openings above the first story of any building, shall be so arranged that they can be readily opened from the outside by the firemen. All rolling iron or steel shutters hereafter placed in the first story of any building shall be counterbalanced, so that said rolling shutters may be readily opened by the firemen. No building hereafter erected, other than a dwelling-house or fire-proof building, shall have inside iron shutters to windows above the first story. All windows and openings above the first story may be exempted from having shutters by the board of ex-. aminers.

Railings Around Well-Holes

In any building in which there shall be any hoistway or freight elevator or well-hole not inclosed in walls constructed of brick or other fire-proof material, and provided with fire-proof doors, the openings thereof, through and upon each floor of said building, shall be provided with and protected by a substantial railing, or with such good and sufficient trap-doors with which to close the same, or both, as may be directed and approved by the superintendent of buildings; and such railings and trap-doors shall be kept closed at all times, except when in actual use by the occupant or occupants of the building having the use or control of same. And in all buildings hereafter erected the roof immediately over the said hoistway, elevator or well-hole shall be covered with a skylight of suitable size.

Elevator Wells Inclosed With Brick Or Iron

All elevators hereafter placed in any building, except such fire-proof buildings as have been or may be erected in accordance with section four hundred and eighty-four of this title, shall be inclosed in suitable walls of brick, or with a suitable framework of iron and burnt-clay filling, or of such other fire-proof material and form of construction as may be approved by the superintendent of buildings. Said walls or construction shall extend through and at least three feet above the roof, and shall have suitable openings in the same, to be provided with fireproof doors, made solid for three feet above the floor level and with grille openings above. Elevators may be put in the well-hole of stairs, in buildings, without such brick or fire-proof inclosures, where the stairs are inclosed in brick or stone walls, and the stairs are constructed as specified in section four hundred and seventy-nine of this title. Elevators may also be placed in any stair-well or open court of any building erected prior to the passage of this act, under a permit therefor from the superintendent of buildings, who may grant such permit upon the approval of the board of examiners hereinafter provided, but the framework and inclosure of any such elevator shall be constructed of fireproof materials.