Mixed Occupancies

Flad Architects of 3 Flad Code Forum Notes : 12 May 2016

Flad Code Forum Notes 12 May 2015 1. Code Forums

a. Notes of past code forums are posted at : i. Flad Home Page / Resources / Codes / Forums / Year / Date of Forum.

b. This Code Forum will Discuss : i. Mixed Occupancies (Separated & Non-Separated Accessory and Incidental Uses

c. Additional information is contained in attached PowerPoint slides: PP-pages. Mixed Occupancies – Refer to PP-01 through PP-92 2. Occupancy Separation : PP-03 through PP-14

a. When asked a code question, the initial related information that is required is the applicable codes and the project’s occupancy.

b. Code issues attributed directly to the building’s occupancy classification : i. Building Limitations - Ch 5 ii. Special Requirements - Ch 4 iii. Fire & Smoke Protection Features - Ch 7 iv. Interior Finish Classifications - Ch 8 v. Fire Protection Systems - Ch 9 vi. Means of Egress - Ch 10

(1) Section 1014 Exit Access (2) Section 1015 Exit and Exit Access Doorways (3) Section 1016 Exit Access Travel Distance (4) Section 1018 Corridors - Ratings & Dead Ends

vii. Section 1607 Live Loads 3. Occupancy vs Use : PP-15 through PP-16

a. When determining the occupancy classification(s) for a project, always consider the actual “function of uses” of the rooms and spaces and not solely on the occupancy.

b. Occupancy Classifications (OC) : IBC and LSC are very similar in their classifications. i. OCs in red are common to Flad projects ii. The majority of projects have multiple uses which may require multiple OCs. iii. Multiple OCs require separated, and/or nonseparated and/or accessory OCs.

4. Incidental Uses : PP-17 through PP-27 a. Incidental uses (IU) are ancillary functions associated with a given occupancy that

generally pose a greater level of risk to that occupancy. i. Examples : furnace rooms, boiler rooms, waste & linen storage

b. IUs are assigned to the predominant OC. c. IUs are limited to 10% of the building area on a given story. d. IUs are to be protected by either Fire Barriers (FB) or by Horizontal Assemblies (HA) or

by both. i. IUs are the only protected rooms that do not have to be supported by equivalent fire-

resistance rated (FRR) assemblies for Type IIB, IIIB, and VB construction (all 0-rated floor construction).

e. If the project has an automatic sprinkler system that permits it not to have a rating (FB or HA), the IU walls and doors still need to resist the passage of smoke.

5. Mixed Use and Occupancy : PP-28 through PP-33 a. IBC describes multiple occupancy classifications as “mixed” G LSC uses “multiple.” b. IBC describes multiple occupancy classifications (“mixed”) that are not separated from

one another as “non-separated” G LSC uses “mixed.”


c. When determining the Occupancy Classification options, the IBC & LSC are different in that the LSC does not have “accessory occupancies” as an option as the IBC does.

d. LSC requires any multiple (separated) occupancies that traverse an adjacent occupancy to be treated as mixed (non-separated) which is more stringent than the IBC.

6. Mixed Use and Occupancy : PP-34 through PP-48 a. Accessory occupancies (AO) are those occupancies that are ancillary to the main

occupancy. (1) Codes do not define what “ancillary” means so the AHJ has the authority to

determine that. b. AOs are limited to 10% of the building area of the story in which they are located. c. AOs are also limited by the tabular values in Table 503, without building area increases

which includes automatic sprinkler increases and/or frontage increases. d. Building Area

i. Area measured within the perimeter formed by the inside surface of the exterior walls. Also include horizontal projection of the roof or floor above.

ii. Only open-air courts and/or yards can be deducted from the building area. e. AOs are individually classified as an occupancy and are required to meet that

occupancy’s requirements (e.g. Means of Egress, sprinkler protection) except for building area, height and number of stories. i. IBC : Table 503 ii. LSC : individual occupancy chapters limit the number of stories but not the area.

7. Assembly Occupancy : PP-49 through PP-69 a. IBC and LSC both define assembly occupancies as a “gathering of people.” b. IBC and LSC both use “50 or more persons” as the occupant threshold. c. Step 1 : Review floor plan for all assembly (see blue hatched areas – PP-52) d. IBC includes (4) exceptions for the Assembly occupancy classification of spaces:

i. 303.1.1 : Tenant spaces w/an occupant load < 50 persons ii. 303.1.2 : Occupant load <50 persons + accessory OR <750 sf + accessory iii. 303.1.3 : Group E occupancy (not applicable to Flad) iv. 303.1.4 : Places of religious worship (not applicable to Flad)

e. If the space meets any of the above exceptions, it is not an Assembly occupancy although for occupant load determination its function of use will still be “assembly” as well as the determination of the required plumbing fixtures.

f. LSC allows for areas that are “incidental uses” (similar to IBC’s “accessory”) including mercantile, business, industrial or storage uses to be assigned to the predominant occupancy except if it does not meet the assembly>50 occupant requirement. LSC does not include an exception for <750 sf.

g. Step 2 : Re-evaluate all of Step 1’s assembly spaces for occupant load (OL)<50 or area <750 sf. All assembly spaces meet one or both of these exceptions except for (2) : the auditorium and the library. All other assembly spaces are classified as business occupancies except when determining their occupant loads by their function of use.

h. Step 3 : Input only those spaces (the auditorium and the library) that are assembly occupancies into the spreadsheet (PP-67) to determine area percentage (<10%) for an accessory classification. i. The top spreadsheet includes all of the initially identified assembly spaces per Step

1. Please note that the overall areas by story (00 & 02) for A-3 occupancies is over the 10% accessory threshold.

ii. The bottom spreadsheet includes all of the final identified assembly spaces per Step 2. Please note that once all of the <50 + <750 assembly spaces were deleted from the area totals, the overall area by story (02) for A-3 occupancies is under the 10% accessory threshold on.

i. Step 4 : Identify any other non-business uses that could be attributed to another occupancy. In this case, the building has a series of storage rooms. While the


aggregate areas of these spaces are <10% on 01 & 02, the single storage room on 00 is 1902 sf and >10% so it does not meet the accessory requirements.

j. Step 5 : The building is a multiple/mixed occupancy building with a predominant Group B (Business) occupancy with a Group A-3 (Assembly) and a Group S-1 (Moderate Hazard Storage) occupancy on Level 00 and accessory S-1 occupancy on Levels 01 & 02.

8. Separated vs Nonseparated : PP-70 through PP-89 a. Accessory occupancies are not required to be separated from the main occupancy. b. Nonseparated occupancies must meet the most restrictive provisions of the following for

the total nonseparated area. i. Chapter 5 – General Building Heights and Areas ii. Chapter 9 – Fire Protection Systems iii. Chapter 10 – Means of Egress

c. Separated occupancies must meet their individual requirements. i. Chapter 5 – General Building Heights and Areas

(1) Use the sum of ratios to determine if the building area requirements are met. ii. Chapter 9 – Fire Protection Systems iii. Chapter 10 – Means of Egress

(1) If the Means of Egress is “shared” with multiple occupants, the most restrictive provisions must be met.

iv. Separations are by Fire Barriers (FB) and/or Horizontal Assemblies (HA) of 1, 2, or 3 hours.

d. Step 6 : Determine if the multiple/mixed occupancy building (B/S-1/A-3) shall be separated and/or nonseparated. i. Review Chapter 5 – General Building Heights and Areas

(1) A-3 + S-1 cannot be in buildings of +2 stories for Type IIA buildings. (a) Solution : provide a HA between Level 01 & Level 02.

ii. Review Chapter 9 – Fire Protection Systems iii. Review Chapter 10 – Means of Egress

(1) Since all occupants of the (3) different occupancies (B/S-1/A-3) share the Means of Egress, the most stringent provisions are required to be met : (a) Panic hardware is required for A-3 occupants (b) Common Path of Travel for A-3 = 75’ vs B&S = 100’, 75’ governs (c) Exit Access Travel Distance for B = 300’ vs A & S = 250’, 250’ governs

9. What Occupancy Does Not Affect : PP-90 a. Determining occupant load, egress capacity, and plumbing fixtures are ALL based on

the “function of use” of the rooms and spaces and not on the occupancy(s). b. For additional clarification on these topics, please review previous Code Forums.

T:\twyatt\Code\Code Forums\2016 0512\2016 0512 Code Forum Notes.docx

F L A D C O D E F O R U M

Mixed Occupancies

Separated & Non-Separated

Accessory and Incidental Uses

05/12/2016 Flad Code Forum 1

O U T L I N E

I. Occupancy Classification

II. Incidental Uses

III. Mixed Use and Occupancy

IV. Accessory Occupancies

V. Assembly Occupancy

VI. Separated vs Nonseparated


OCCUPANCY CLASSIFICATION


Code Questions

Flad Staff

“I have a code question about my project.”

1st Response

“What are the applicable codes?”

2nd Response

“What are the occupancies of your project?”

Other than accessibility requirements, the majority of code issues can be attributed directly to the building’s

occupancy classification.


Occupancy Classification

Building Limitations (Ch 5)– Construction Type

• Allowable Area

• Allowable Stories

• Allowable Height

– Section 507 - Unlimited Area Bldgs

– Section 510 - Special Provisions

Special Requirements (Ch 4)– Section 407 Group I-2

– Section 408 Group I-3

– Section 415 Groups H

– Section 420 Group I-1, R-1, R-2, R-3



• Fire & Smoke Protection Features - Ch 7

– Fire Walls : Fire-Resistance Rating (FRR)

– Fire Barrier & Horizontal Assembly : FRR



• Interior Finish Classifications - Ch 8



• Fire Protection Systems - Ch 9

– Section 903 Automatic Sprinkler Systems

– Section 905 Standpipe Systems

– Section 906 Portable Fire Extinguishers

– Section 907 Fire Alarm and Detection Systems

– Section 908 Emergency Alarm Systems

– Section 910 Smoke And Heat Removal



• Means of Egress - Ch 10

– Section 1008 Doors, Gates and Turnstiles

• 1008.1.9.3 Locks and latches

– 1008.1.9.7 Delayed egress locks.

– 1008.1.9.8 Access-controlled egress doors.

– 1008.1.9.9 Electromagnetically locked egress doors.

– 1008.1.10 Panic and fire exit hardware.




– Section 1014 Exit Access

• 1014.3 Common path of egress travel.




– Section 1015 Exit And Exit Access Doorways

• 1015.1 Exits or exit access doorways from spaces




– Section 1016 Exit Access Travel Distance




– Section 1018 Corridors - Ratings

– Dead Ends

• 20’ or 50’ : B, E, F, I-1, R-1, R-2, S & U (sprinkler system)



• Structural Design - Ch 16

– Section 1607 Live Loads


Occupancy vs Use


Occupancy Classifications

IBC (27)

• Assembly (A-1, A-2, A-3, A-4, A-5)

• Business (B)

• Educational (E)

• Factory and Industrial (F-1 & F-2)

• High Hazard (H-1, H-2, H-3, H-4, H-5)

• Institutional (I-1, I-2, I-3, I-4)

• Mercantile (M)

• Residential (R-1, R-2, R-3, R-4)

• Storage (S-1 & S-2)

• Utility and Miscellaneous (U)

• Existing Buildings (Chapter 34)

LSC (37)

• Ambulatory Health Care (New/Exist)

• Apartment Buildings (New/Exist)

• Assembly (New/Exist) x3

• Business (New/Exist)

• Day-Care (New/Exist) x2

• Detention and Correctional (New/Exist)

• Education (New/Exist)

• Industrial x3

• Health Care (New/Exist)

• Hotels and Dormitories (New/Exist)

• Mercantile (New/Exist) x3

• One- and Two-Family Dwellings

• Residential Board and Care (New/Exist) x2

• Storage x3

Flad Code Forum05/12/2016 16

INCIDENTAL USES


SECTION 509 INCIDENTAL USES

509.1 General

509.2 Occupancy classification.

509.3 Area limitations.

509.4 Separation and protection.

509.4.1 Separation.

509.4.2 Protection.

509.4.2.1 Protection limitation.


509.1 General

Incidental uses located within single occupancy ormixed occupancy buildings shall comply with the provisions of this section.

Incidental uses are ancillary functions associated with a given occupancy that generally pose a greater level of risk to that occupancy and are limited to those uses listed in Table 509.

Exception: Incidental uses within and serving a dwelling unit are not required to comply with this section.


IBC : SECTION 509 INCIDENTAL USES


LSC : Table 18.3.2.1



Incidental uses shall not be individually

classified in accordance with Section 302.1.

Incidental uses shall be included in the building

occupancies within which they are located.



Incidental uses shall not occupy more than 10%

of the building area of the story in which they

are located.



The incidental uses listed in Table 509 shall be

separated from the remainder of the building or

equipped with an automatic sprinkler system,

or both, in accordance with the provisions of

that table.

509.4.1 Separation.

509.4.2 Protection.



509.4.1 Separation.

Where Table 509 specifies a fire-resistance-rated separation, the incidental uses shall be separated from the remainder of the building by a fire barrier constructed in accordance with Section 707 or a horizontal assembly constructed in accordance with Section 711, or both.

Construction supporting 1-hour fire barriers or horizontal assemblies used for incidental use separations in buildings of Type IIB, IIIB and VB construction is not required to be fire-resistance rated unless required by other sections of this code.


509.4.2 Protection.

Where Table 509 permits an automatic sprinkler system without a fire barrier, the incidental uses shall be separated from the remainder of the building by construction capable of resisting the passage of smoke.

The walls shall extend from the top of the foundation or floor assembly below to the underside of the ceiling that is a component of a fire-resistance-rated floor assembly or roof assembly above or to the underside of the floor or roof sheathing, deck or slab above.

Walls surrounding the incidental use shall not have air transfer openings unless provided with smoke dampers in accordance with Section 710.7.


509.4.2 Protection.

Doors shall be self- or automatic-closing upon detection of smoke in accordance with Section 716.5.9.3. Doors shall not have air transfer openings and shall not be undercut in excess of the clearance permitted in accordance with NFPA 80.


Except as specified in Table 509 for certain incidental uses, where an automatic sprinkler system is provided in accordance with Table 509, only the space occupied by the incidental use need be equipped with such a system.


MIXED USE AND OCCUPANCY


IBC (2012)

SECTION 508 MIXED USE AND OCCUPANCY

508.1 General.

508.2 Accessory occupancies.

508.3 Nonseparated occupancies.

508.4 Separated occupancies.

SECTION 509 INCIDENTAL USES

509.1 General





LSC (2012)

6.1 Classification of Occupancy.

6.1.14 Multiple Occupancies.

6.1.14.1 General.

6.1.14.2 Definitions.

6.1.14.2.1 Multiple Occupancy.

6.1.14.2.2 Mixed Occupancy.

6.1.14.2.3 Separated Occupancy.

6.1.14.3 Mixed Occupancies.

6.1.14.4 Separated Occupancies.


Occupancy Classification Options

IBC

Option 1 : Accessory

Option 2 : Nonseparated

Option 3 : Separated

OR

Combo of Options 1-3

LSC

Option X : Accessory

Option 2 : Mixed

Option 3 : Separated

OR

Combo of Options 2 & 3




508.1 General.

Each portion of a building shall be individually classified in accordance with

Section 302.1. Where a building contains more than one occupancy group,

the building or portion thereof shall comply with the applicable provisions of

Section 508.2, 508.3 or 508.4, or a combination of these sections.

Exceptions:

1. Occupancies separated in accordance with Section 510.

2. Where required by Table 415.5.2, areas of Group H-1, H-2 and H-3occupancies shall be located in a detached building or structure.

3. Uses within live/work units, complying with Section 419, are not considered separate occupancies.


LSC : 6.1.14 Multiple Occupancies

6.1.14.1 General.

6.1.14.1.1 Multiple occupancies shall comply with the requirements of 6.1.14.1 and one of the following:

(1) Mixed occupancies - 6.1.14.3

(2) Separated occupancies - 6.1.14.4

6.1.14.1.2 Where exit access from an occupancy traverses another occupancy, the multiple occupancy shall be treated as a mixed occupancy.


ACCESSORY OCCUPANCIES


508.2 Accessory occupancies

Accessory occupancies are those occupancies that are

ancillary to the main occupancy of the building or portion

thereof.

Accessory occupancies shall comply with the provisions of Sections 508.2.1 through 508.2.4.

508.2.1 Area limitations.

508.2.2 Occupancy classification.

508.2.3 Allowable building area and height.

508.2.4 Separation of occupancies.



Aggregate accessory occupancies shall not

occupy more than 10 percent of the building

area of the story in which they are located

AND

shall not exceed the tabular values in Table 503,

without building area increases in accordance

with Section 506 for such accessory

occupancies.


BUILDING AREA

The area included within surrounding exterior walls(or exterior walls and fire walls) exclusive of vent shafts and courts.

Commentary : A building area is the "footprint" of the building; that is, the area measured within the perimeter formed by the inside surface of the exterior walls. This excludes spaces that are inside this perimeter and open to the outside atmosphere at the top, such as open shafts and courts.


BUILDING AREA


BUILDING AREA

Areas of the building

not provided with

surrounding walls shall

be included in the

building area if such

areas are included

within the horizontal

projection of the roof

or floor above.


Horizontal Projections?


Horizontal Projections ?



The area of the portion of the building devoted to an accessory occupancy must be less than the

tabular building area permitted by Table 503, based on the group classification that most nearly resembles the accessory occupancy under consideration.

Area increases for street frontage and automatic sprinkler protection based on the provisions of Sections 504 and 506 are not allowed.



Accessory occupancies shall be individually classified in accordance with Section 302.1.

The requirements of this code shall apply to each portion of the building based on the occupancy classification of that space.

Commentary : Code requirements such as means of egress, the provision of sprinkler protection and structural load are to be determined for this occupancy as if it werea main occupancy of the building.


Use and Occupancy Classification


Tabular Building Area : Table 503


Use and Occupancy Classification


LSC : Story Limitations


ASSEMBLY OCCUPANCY


SECTION 303 ASSEMBLY GROUP A

303.1 Assembly Group A.

Assembly Group A occupancy includes, among others, the use of a

building or structure, or a portion thereof, for the gathering of persons

for purposes such as civic, social or religious functions; recreation, food

or drink consumption or awaiting transportation.

303.1.1 Small buildings and tenant spaces.

303.1.2 Small assembly spaces.

303.1.3 Associated with Group E occupancies.

303.1.4 Accessory to places of religious worship.


LSC : 6.1 Classification of Occupancy

6.1.2 Assembly.

For requirements, see Chapters 12 and 13.

6.1.2.1 Definition - Assembly Occupancy.

An occupancy(1) used for a gathering of 50 or more persons for

deliberation, worship, entertainment, eating, drinking, amusement, awaiting transportation, or similar uses; or

(2) used as a special amusement building, regardless of occupant load.



303.1.1 Small buildings and tenant spaces.

A building or tenant space used for assembly purposes with an occupant load of less than 50 persons shall be classified as a Group B occupancy.

Commentary : Examples of this include small "fast food" establishments and small "mom-and-pop" restaurants or coffee shops.



303.1.3 Associated with Group E occupancies.

A room or space used for assembly purposes that is

associated with a Group E occupancy is not

considered a separate occupancy.

303.1.4 Accessory to places of religious worship.

Accessory religious educational rooms and religious

auditoriums with occupant loads of less than 100

are not considered separate occupancies.




The following rooms and spaces shall not be classified as Assembly occupancies:

1. A room or space used for assembly purposes with an occupant load of less than 50 persons and accessoryto another occupancy shall be classified as a Group B occupancy or as part of that occupancy.

2. A room or space used for assembly purposes that is less than 750 square feet in area and accessory to another occupancy shall be classified as a Group B occupancy or as part of that occupancy.



The exceptions given to assembly spaces in nonassembly buildings is a practical code consideration that permits a mixed occupancy condition to exist without requiring compliance with the provisions for mixed occupancies (see Section 508) or accessory occupancies (see Section 508.2).

Although the term "accessory" is used in many of these exceptions, the intent of the use of the term here is that the use of the space is related to, or part of, the main use of the space.

These exceptions are not limited by the accessory use requirementsfound in Section 508.2.



For other code requirements, close attention needs to be paid as to whether they are based either on the Chapter 3 occupancy category, or the use of the space.

For example, occupant load is determined based on the function of the space (see Table 1004.1.1), but corridor requirements for rated construction (see Table 1018.1) are based on the occupancy category being served. Sprinkler requirements in Section 903.2 are generally based on thresholds for each occupancy category.



An office building, Group B, has a conference room used for staff meetings.

The occupancy of a conference room is typically considered a Group A-3.

Since the occupant load of the conference room is less than 50 and its function is clearly accessory to the business area, the provisions permit the room to be included in the main occupancy, Group B.



• 749 sf assembly area

• Mercantile

• Floor area = 5,000 sf

• Assembly use = 15%

• 749 sf < 750 sf

• Not considered a separate Group Aoccupancy



6.1.14.1.3 Where incidental (accessory) to another occupancy, areas used as follows shall be permitted to be considered part of the predominant occupancy and shall be subject to the provisions of the Code that apply to the predominant occupancy:

(1) Mercantile, business, industrial, or storage use

(2) Nonresidential use with an occupant load fewerthan that established by Section 6.1 for the occupancy threshold



A.6.1.14.1.3(2)

Examples of uses that have occupant loads below the occupancy

classification threshold levels include the following: (1) Assembly use with fewer than 50 persons within a business

occupancy

A.6.1.14.3.2

For example, a common path of travel that occurs wholly in a business

tenant space, in a multiple occupancy building containing assembly

and business occupancies, should not have to meet the assembly

occupancy common path of travel limitation.



A.6.1.2.1 Assembly Occupancy.

Assembly occupancies include the following:

(7) Conference rooms

(13) Libraries

Occupancy of any room or space for assembly purposes by fewer than 50 persons in another occupancy, and incidental (accessory) to such other occupancy, should be classified as part of the other occupancy and should be subject to the provisions applicable thereto.


Assembly Occupant Loads



The exceptions given to assembly spaces in nonassembly buildings is a practical code consideration that permits a mixed occupancy condition to exist without requiring compliance with the provisions for mixed occupancies (see Section 508) or accessory occupancies (see Section 508.2).

Although the term "accessory" is used in many of these exceptions, the intent of the use of the term here is that the use of the space is related to, or part of, the main use of the space.

These exceptions are not limited by the accessory use requirementsfound in Section 508.2.


508.2.3 Allowable building area and

height.

The allowable building area and height of the building shall be based on the allowable building area and height for the main occupancy in accordance with Section 503.1.

The height of each accessory occupancy shall not exceedthe tabular values in Table 503, without increases in accordance with Section 504 for such accessory occupancies.

The building area of the accessory occupancies shall be in accordance with Section 508.2.1.


SEPARATION vs NONSEPARATED


508.2.4 Separation of occupancies.

No separation is required between accessory occupancies and the main occupancy.

Exceptions:

1. Group H-2, H-3, H-4 and H-5 occupancies shall be separated from all other occupancies in accordance with Section 508.4.

2. Group I-1, R-1, R-2 and R-3 dwelling units and sleeping units shall be separated from other dwelling or sleeping units and from accessory occupancies contiguous to them in accordance with the requirements of Section 420.


508.3 Nonseparated occupancies.

Buildings or portions of buildings that comply

with the provisions of this section shall be

considered as nonseparated occupancies.

508.3.1 Occupancy Classification.

508.3.2 Allowable building area and height.

508.3.3 Separation.


508.3.1 Occupancy Classification.

Nonseparated occupancies shall be individually classified in accordance with Section 302.1. The requirements of this code shall apply to each portion of the building based on the occupancy classification of that space.

In addition, the most restrictive provisions of Chapter 9 which apply to the nonseparated occupancies shall apply to the totalnonseparated occupancy area.

Where nonseparated occupancies occur in a high-risebuilding, the most restrictive requirements of Section 403 which apply to the nonseparated occupancies shall apply throughout the high-rise building.


508.3.2 Allowable building area and

height.

The allowable building area and height of the

building or portion thereof shall be based on the

most restrictive allowances for the occupancy

groups under consideration for the type of

construction of the building in accordance with

Section 503.1.


508.3.3 Separation.

No separation is required between

nonseparated occupancies.


508.4 Separated occupancies.

Buildings or portions of buildings that comply with the provisions of this section shall be considered as separated occupancies.


508.4.2 Allowable building area.

508.4.3 Allowable height.

508.4.4 Separation.

508.4.4.1 Construction.



Separated occupancies shall be individually

classified in accordance with Section 302.1.

Each separated space shall comply with this

code based on the occupancy classification of

that portion of the building.


508.4.2 Allowable building area.

In each story, the building area shall be such that the sum of the ratios of the actual building area of each separated occupancy divided by the allowable building area of each separated occupancy shall not exceed 1.


508.4.3 Allowable height.

Each separated occupancy shall comply with the

building height limitations based on the type of

construction of the building in accordance with

Section 503.1.

Exception: Special provisions permitted by Section

510 shall permit occupancies at building heights

other than provided in Section 503.1.


508.4.4 Separation.

Individual occupancies shall be separated from

adjacent occupancies in accordance with Table

508.4.


IBC : Table 508.4.


LSC : Table 6.1.14.4.1 (a)



Required separations shall be fire barriers

constructed in accordance with Section 707 or

horizontal assemblies constructed in accordance

with Section 711, or both, so as to completely

separate adjacent occupancies.


Separations : Pros/Cons

Construction Type– Allowable Area

– Allowable Stories

– Allowable Height

FRR– Fire Walls

– Fire Barrier

– Horizontal Assembly

Interior Finishes Classifications

Fire Protection Systems


Allowable Stories


Allowable Stories


Required separations shall be fire barriers constructed in accordance with Section 707 or horizontal assemblies constructed in accordance with Section 711, or both, so as to completely separate adjacent occupancies.


Means of Egress

• Section 1008 Doors, Gates and Turnstiles

– 1008.1.9.3 Locks and latches

• 1008.1.10 Panic and fire exit hardware.

– Doors … in a Group A shall not be provided with a latch or lock unless it is panic hardware or fire exit hardware.

• Section 1014 Exit Access• 1014.3 Common path of egress travel.

– B & S = 100’ … A = 75’

• Section 1016 Exit Access Travel Distance

– B = 300’ … A & S = 250’


What OCCUPANCY Does NOT Affect


F L A D C O D E F O R U M

T H A N K Y O U F O R

AT T E N D I N G


Mixed Occupancies

Design

Transcript of Mixed Occupancies