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DIVISION 6 – TYPES OF CONSTRUCTION
CHAPTER 13-60
CLASSIFICATION OF BUILDINGS BY CONSTRUCTION TYPE
13-60-010   Construction types.
13-60-020   Type I, fire-resistive construction.
13-60-030   Type II, noncombustible construction.
13-60-040   Type III, exterior protected construction.
13-60-050   Type III-A, heavy timber construction.
13-60-060   Type III-B and III-C, ordinary construction.
13-60-070   Type IV, combustible frame construction.
13-60-080   Mixed types of construction.
13-60-090   Fire-resistive values.
13-60-100   Types of construction – Fire-resistive requirements.
13-60-110   Exception to fire protection.
13-60-120   Supporting members – Fire-resistive value.
13-60-130   Elevator framing – Exception to fire protection.
13-60-140   Lintels – Exception to fire protection.
13-60-150   Supporting wall facing – Fire protection provisions.
13-60-160   Mezzanine – Fire protection provisions.
13-60-170   Basement construction – Fire-resistive requirements.
13-60-180   Basement columns and bearing walls – Noncombustible materials required.
13-60-190   Sub-basement floor construction requirements.
13-60-200   Floor construction.
13-60-210   Driveways and loading spaces.
13-60-010  Construction types.
   All buildings shall be classified under four general types, according to the character of materials employed, their method of assembly, and the fire resistance which they afford as follows:
   Type I – Fire-Resistive Construction.
      Type I-A.
      Type I-B.
      Type I-C.
   Type II – Noncombustible Construction.
   Type III – Exterior Protected Construction.
      Type III-A – Heavy Timber.
      Type III-B – Ordinary.
      Type III-C – Ordinary.
   Type IV – Combustible Frame Construction.
      Type IV-A.
      Type IV-B.
(Prior code § 49-1)
13-60-020  Type I, fire-resistive construction.
   Type I, fire-resistive construction, shall include Types I-A, I-B and I-C and shall be that construction in which all structural elements, including walls, bearing partitions, floors, ceilings, roofs and their supports, are of noncombustible materials, providing fire resistance as required in Section 13-60-100. Fire retardant treated wood may be used in roof framing and roof sheathing of one story buildings that do not exceed the height and area limitations for Type II construction as established in Sections 13-48-030 and 13-48-090.
   Subject to the provisions of Chapter 15-8, combustible material may be used in buildings of fire- resistive construction for the following purposes:
   (a)   Doors, door frames and bucks;
   (b)   Windows and window frames;
   (c)   Interior trim, including grounds and furring;
   (d)   Finished flooring and sleepers;
   (e)   Frames, platforms and aprons of exterior show windows at street level;
   (f)   Handrails;
   (g)   Interior wall and ceiling finishes;
   (h)   Roof insulation;
   (i)   Exterior wall finishes, when in compliance with Sections 15-8-080 through 15-8-086.
(Prior code § 49-2; Amend Coun. J. 5-17-00, p. 32653, § 1)
13-60-030  Type II, noncombustible construction.
   Type II, noncombustible construction, shall be that construction in which all structural elements, including walls, bearing partitions, floors, ceilings, roofs and their supports, are of noncombustible materials but which are generally not fire protected except as required in Section 13-60-100. Fire retardant treated wood may be used in roof framing and roof sheathing of one story buildings only.
   Subject to the provisions of Chapter 15-8, combustible material may be used in buildings of noncombustible construction for the following purposes:
   (a)   Doors, door frames and bucks;
   (b)   Windows and window frames;
   (c)   Interior trim, including grounds and furring;
   (d)   Finished flooring and sleepers;
   (e)   Frames, platforms and aprons of exterior show windows, at street level;
   (f)   Handrails;
   (g)   Interior wall and ceiling finishes;
   (h)   Roof insulation;
   (i)   Exterior wall finishes, when in compliance with Sections 15-8-080 through 15-8-086.
(Prior code § 49-3; Amend Coun. J. 5-17-00, p. 32653, § 1)
13-60-040  Type III, exterior protected construction.
   Type III, Exterior Protected Construction, shall include Types III-A, III-B and III-C and shall be that construction in which all structural elements of exterior walls are of non-combustible materials and the wall assembly provides fire resistance not less than required by Section 13-60-100. The structural elements of interior framing shall be as required in Sections 13-60-050 and 13-60-060.
(Prior code § 49-4; Amend Coun. J. 5-17-00, p. 32653, § 1)
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