Building Code Title 27 Subchapter 3 - Welcome to NYC.gov

1 Title 27 / Subchapter 3113 Subchapter 3 occupancy AND CONSTRUCTIONCLASSIFICATIONTABLE OF CONTENTS[Sub-Art. Art. or Sec.]* or Sec.**[ ] Art. 1 General[ ] 234 Scope[ ] 235 Reference Standards[ ] 236 Definitions[ ] Art. 2 occupancy Classifications[ ]237 occupancy Groups[ ] 238 Classification of Spaces[ ] 239 Classification of Buildings[ ] 240 Separation of Occupancies[ ]241 Classification Tables[ ] 242 Multiple occupancy or Use[ ] Art.

2 3 occupancy Group A-HighHazard[ ] 243 Classification[ ] 244 Location Restrictions[ ] Art. 4 occupancy Group B-Storage[ ] 245 Classification[ ] 246 occupancy Group B-1[ ] 247 occupancy Group B-2[ ] Art. 5 occupancy Group C-Mercantile[ ] 248 Classification[ ] Art. 6 occupancy Group D-Industrial[ ] 249 Classification[ ] 250 occupancy Group D-1[ ] 251 occupancy Group D-2[ ] 252 Location Restrictions[ ] Art.

3 7 occupancy Group E-Business[ ] 253 Classification[ ] Art. 8 occupancy Group F-Assembly[ ] 254 Classification[ ] 255 occupancy Group F-1[ ] 256 occupancy Group F-2[ ] 257 occupancy Group F-3[ ] 258 occupancy Group F-4[ ] Art. 9 occupancy Group G-Educational[ ] 259 Classification[ ] Art. 10 occupancy Group H-Institutional[ ] 260 Classification[ ] 261 occupancy Group H-1[ ] 262 occupancy Group H-2[ ] Art.

4 11 occupancy Group J-Residential[ ] 263 Classification[ ] 264 occupancy Group J-1[ ] 265 occupancy Group J-2[ ] 266 occupancy Group J-3[ ] Art. 12 occupancy Group K-Miscellaneous[ ] 267 Classification[ ] Art. 13 Doubtful Occupancies[ ] 268 Classification[ ] Art. 14 ConstructionClassifications[ ]269 Construction Classes[ ] 270 Classification ofBuildings and Spaces[ ]271 Classification Table[ ]272 False Designation[ ] 273 Minimum Requirements[ ] Art.

5 15 Construction Group I-Noncombustible[ ] 274 Classification[ ] 275 Construction Class I-A[ ] 276 Construction Class I-B[ ] 277 Construction Class I-C[ ] 278 Construction Class I-D[ ] 279 Construction Class I-E[ ] Art. 16 Construction Group II-Combustible[ ] 280 Classification[ ] 281 Construction Class II-A[ ] 282 Construction Class II-B[ ] 283 Construction Class II-C[ ] 284 Construction Class II-D[ ] 285 Construction Class II-E[ ] Art.

6 17 Mixed Construction[ ] 286 Classification[ ] 287 Restrictions*"C26" omitted from section numbers in this column.**"27" omitted from section numbers in this OF TABLEST able Classifications3-2 Typical Occupancies for OccupancyClassification3-3 Construction Classes3-4 Construction Classifications Notes to 1 GENERAL [ ] 27-234 provisions of thissubchapter shall establish and control the classificationof all buildings, and spaces therein, with respect tooccupancy group and class of construction.

7 [ ] 27-235 Reference 27 / Subchapter 3114 occupancy and construction classifications which appearin the several reference standards of this code shall applyto the provisions of the reference standard only unlessotherwise indicated. [ ] 27-236 definitions to beused in the interpretation of this Subchapter , seesubchapter two of this 2 occupancy CLASSIFICATIONS [ ] 27-237 occupancy 3-1 lists occupancy groups and sub groups that shall beestablished for classifying buildings and spaces inaccordance with the provisions of articles threethrough twelve of this 3-1 occupancy CLASSIFICATIONSO ccupancyGroupClassificationFireIndexAHig h hazard4B-1 Storage (moderate hazard)3B-2 Storage (low hazard)

8 2 CMercantile2D-1 Industrial (moderate hazard)3D-2 Industrial (low hazard)2 EBusiness2F-1aAssembly (theaters, etc.)1F-1bAssembly (churches, concert halls,etc.)1F-2 Assembly (outdoors)1F-3 Assembly (museums, etc.)1F-4 Assembly (restaurants, etc.)1 GEducation1H-1 Institutional (restrained)1H-2 Institutional (incapacitated)1J-1 Residential (hotels, etc.)1J-2 Residential (apartment houses, etc.)1J-3 Residential (one-and-two-familydwellings)1 KMiscellaneous1 [ ] 27-238 Classification of or room hereafter altered or erected shall, for thepurposes of this code , be classified in one of theoccupancy groups listed in Table 3-1 according to theoccupancy or use of the space or room.

9 [ ] 27-239 Classification of hereafter erected or altered under the provisionsof section 27-115 of article four of Subchapter one of thischapter shall, for the purposes of this code , be classifiedin one of the occupancy groups listed in table 3-1according to the main use or dominant occupancy of thebuilding. However, at the option of the applicant, subjectto the approval of the commissioner, buildings may beclassified in any other occupancy group, provided suchoccupancy group has a higher fire index, as listed in table3-1, than the fire index of the occupancy groupclassification of the main use or dominant occupant.

10 [ ] 27-240 Separation of within buildings shall be separated fromone another as follows:a. Spaces classified in occupancy groups having ahigher fire index, as listed in table 3-1, than the fireindex of the occupancy group classification of thebuilding, shall be separated from adjoining spaces byconstruction meeting the fire-resistance ratingrequirements for fire divisions under the provisions ofsubdivision (a) of section 27-339 of article five ofsubchapter five of this chapter.