N.Y. Comp. Codes R. & Regs. Tit. 12 §§ 23-2.4

Current through Register Vol. 46, No. 51, December 18, 2024

Section 23-2.4 - Flooring requirements in building construction

(a) Permanent flooring--skeleton steel construction in tiered buildings. The permanent floors of such buildings or other structures shall be installed as soon as possible as the erection of structural steel members progresses. In no case shall there be more than eight stories, floors or equivalent levels or 120 feet, whichever is less, between the erection floor and the uppermost permanent floor.

(b) Temporary flooring--skeleton steel construction in tiered buildings.

(1) Erection by tower crane or derrick.

(i) The erection floor shall be covered over the entire surface except for access openings. Such flooring shall be of the proper strength to support the working load intended to be imposed thereon. Such temporary flooring shall be laid tight and secured against movement.

(ii) There shall also be provided a tight and substantial floor within two stories or 30 feet, whichever is less, below and directly under that portion of each tier of beams on which any work is being performed. Such floor shall be of the proper strength to support the working load intended to be imposed thereon. Such floor shall be constructed of planking at least two inches thick full size or material of equivalent strength as a minimum.

(2) Erection by ground-supported crane. Where erection is being done by means of a crane operating on the ground, grade or equivalent surface, a tight, secure and substantial floor shall be installed within two stories or 30 feet, whichever is less, below and directly under that portion of each tier of beams on which any work is being performed. Such floor shall consist of planking at least two inches thick full size or of material of equivalent strength. As an alternative to such floor, an approved life net installed in compliance with this Part (rule) may be provided. Any such life net shall be installed and maintained not more than two stories or 30 feet, whichever is less, below and directly under that portion of each tier of beams on which any work is being performed.

(3) High one story skeleton steel construction. In the erection of one story skeleton steel buildings or other structures where the clear vertical height of such building or other structure is 30 feet or more, protection similar to that required for tiered construction as specified in paragraphs (1) and (2) above shall be provided.

(c) Flooring--other construction.

(1) In the erection of any building or other structure having double wood floor or bar joist construction, the rough flooring shall be completed as the construction of such building or other structure progresses, including the tier below the one on which the wood floor joists or bar joists are being installed.

(2) In the construction of a building or other structure having single wood flooring or any other flooring system, the floor immediately below the story where the floor joists are being installed shall be kept covered. Such flooring shall be at least two inches thick full size or shall be of material of equivalent strength and be laid tight and secure.

N.Y. Comp. Codes R. & Regs. Tit. 12 §§ 23-2.4