506.2 Allowable area determination.
BC § 506.2
The allowable area of a building shall be determined in accordance with the applicable provisions of Sections 506.2.1 through 506.2.4, and Section 506.3. Table 506.2 aAllowable Area Factor (At = NS, S1, S13D, S13R, or SM, as applicable) in Square Feet Occupancy ClassificationSee FootnotesType of ConstructionType IType IIType IIIType IV iType VABABABHTABOccupancy ClassificationSee FootnotesType of ConstructionType IType IIType IIIType IV iType VABABABHTABA-1NS b, cULUL17,50010,50014,7005,60015,0008,4005,500S1ULUL52,50031,50044,10016,80045,00025,20016,500SMULUL35,00021,00029,40011,20030,00016,80011,000A-2NS b, cULUL17,5009,50014,0005,60015,0008,4005,500S1ULUL52,50028,50042,00016,80045,00025,20016,500SMULUL35,00019,00028,00011,20030,00016,80011,000A-3NS b, cULUL17,5009,50014,0005,60015,0008,4005,500S1ULUL52,50028,50042,00016,80045,00025,20016,500SMULUL35,00019,00028,00011,20030,00016,80011,000A-4NS b, cULUL17,5009,50014,0005,60015,0008,4005,500S1ULUL52,50028,50042,00016,8004500025,20016,500SMULUL35,00019,00028,00011,20030,00016,80011,000A-5NS b, cULULULULULULULULULS1SMBNS b, cULUL37,50010,50028,5005,60036,0008,4005,500S1ULUL112,50031,50085,50016,800108,00025,20016,500SMULUL75,00021,00057,00011,20072,00016,80011,000ENS b, cULUL26,00010,50023,5005,60025,5008,4005,500S1ULUL78,00031,50070,50016,80076,50025,20016,500SMULUL52,00021,00047,00011,20051,00016,80011,000F-1NS b, cULUL12,5007,5007,5003,00010,0003,0001,000S1ULUL37,50022,50022,5009,00030,0009,0003,000SMULUL25,00015,00015,0006,00020,0006,0002,000F-2NS b, cULUL37,50010,50028,5005,60030,0008,4005,500S1ULUL112,50031,50085,50016,80090,00025,20016,500SMULUL75,00021,00057,00011,20060,00016,80011,000H-1NS b, c21,00016,50011,0007,5009,5007,00010,5007,500NPS1H-2 fNS b, c21,00016,50011,0007,5009,5007,00010,5007,5003,000S1SMH-3 fNS b, cUL60,00026,50014,00017,50013,00025,00010,0005,000S1SMH-4NS b, cULUL37,50017,50028,50017,50036,00018,0006,500S1ULUL112,50052,50085,50052,500108,00054,00019,500SMULUL75,00035,00057,00035,00072,00036,00013,000H-5NS b, cULUL37,50023,00028,50019,00036,00018,0009,000S1ULUL112,50069,00085,50057,000108,00054,00027,000SMULUL75,00046,00057,00038,00072,00036,00018,000I-1NS b, cULUL19,000NP16,5005,60018,000NPNPS13DULUL19,000NP16,5005,60018,000NPNPS1ULUL57,00049,50016,80054,000NPNPSMULUL38,000NP33,00011,20036,000NPNPI-2NS b, cULUL7,0003,5005,0001,2006,5002,000NPS1ULUL21,00010,50015,0003,60019,5006,000NPSMULUL14,0007,00010,0002,40013,0004,000NPI-3NS b, cULUL7,0003,5005,0001,2006,5002,000NPS1ULUL21,00010,50015,0003,60019,5006,000NPSMULUL14,0007,00010,0002,40013,0004,000NPI-4NS b, cULUL26,5009,50023,5005,60025,5008,4005,500S1ULUL79,50028,50070,50016,80076,50025,20016,500SMULUL53,00019,00047,00011,20051,00016,80011,000MNS b, cULUL21,5007,50018,5005,60014,0008,4005,500S1ULUL64,50022,50055,50016,80042,00025,20016,500SMULUL43,00015,00037,00011,20028,00016,80011,000R-1NS b, cULULULNP24,000NP20,500NPNPS13RS1ULULULNP72,000NP61,500NPNPSMULULULNP48,000NP41,000NPNPR-2NS b, cULULULNP24,0005,60020,500NPNPS13RS1ULULULNP72,00016,80061,500NPNPSMULULULNP48,00011,20041,000NPNPR-3NS b, cULUL17,50010,50014,7005,60030,0008,400 g, h5,500 gS13D5,600S13RS1ULUL52,50031,50044,10016,80090,0008,400 g, h5,500 gSMULUL35,00021,00029,40011,20060,000S-1NS b, cUL48,00012,0007,5007,5007,5007,5005,0001,000S1UL144,00036,00022,50022,50022,50022,50015,0003,000SMUL96,00024,00015,00015,00015,00015,00010,0002,000S-2 d, eNS b, cULUL15,00010,00010,0008,50010,0008,4005,500S1ULUL45,00030,00030,00025,50030,00025,20016,500SMULUL30,00020,00020,00017,00020,00016,80011,000U eNS b, cUL35,00019,0008,50014,0008,50018,0009,0005,500S1UL105,00057,00025,50042,00025,50054,00027,00016,500SMUL70,00038,00017,00028,00017,00036,00018,00011,000 = Not permitted in Fire District = Not permitted in Fire District without sprinklers Note: UL = Unlimited; NP = Not permitted. For SI: 1 square foot = 0.0929 m 2 . NS = Buildings not equipped throughout with an automatic sprinkler system; S1 = Buildings a maximum of one story above grade plane equipped throughout with an automatic sprinkler system installed in accordance with Section 903.3.1.1; SM = Buildings two or more stories above grade plane equipped throughout with an automatic sprinkler system installed in accordance with Section 903.3.1.1; S13R = Buildings equipped throughout with an automatic sprinkler system installed in accordance with Section 903.3.1.2; S13D = Buildings equipped throughout with an automatic sprinkler system installed in accordance with Section 903.3.1.3. a. See the following sections for general exceptions to Table 506.2.
1.See Chapters 4 and 5 for specific exceptions to the allowable height in this chapter.
2.Section 506.3, Allowable area increase due to frontage.
3.Section 507, Unlimited area building. b. See Section 903.2 for the minimum thresholds for protection by an automatic sprinkler system for specific occupancies. c. The NS value is only for use in buildings not required by this code to be equipped throughout with an automatic sprinkler system. d. For open parking structures, see Section 406.5. e. For private garages, see Section 406.3. f. See Section 415.8 for limitations. g. See Exception 9 of Section D105.1 for allowances of Type VA and VB construction for R-3 occupancies. h. See Exception 12 of Section D105.1 for allowances of Type VA construction for R-3 occupancies in Lower Density Growth Management Areas. i. Type IV construction utilizing cross-laminated timber or structural composite lumber shall be sprinklered where required by Section 903.2.13.
