13 Alaska Admin. Code § 50.020

Current through October 17, 2024

Section 13 AAC 50.020 - International Building Code

The International Building Code 2021 Edition (IBC), Chapters 1 - 12, 14 - 28, and 30 - 35, and Appendix C are adopted by reference to regulate all occupancies and buildings, except that the IBC is revised by deleting all the references to "ICC Electrical Code" or "NFPA 70" and replacing those references with "Electrical Code as adopted by 8 AAC 70.025, as amended from time to time" and the IBC is revised by deleting all the references to "International Fuel Gas Code", with the exception of Chapter 3 Section 304 and Chapters 6 and 7, deleting all the references to "International Plumbing Code" and replacing the references to "International Fuel Gas Code" and "International Plumbing Code" with "Plumbing Code as adopted by 8 AAC 63.010, as amended from time to time". Additionally the IBC is changed with the following revisions:

(1) Chapter 1 of the IBC is revised by deleting Sections 104.4.4, 101.4.6, 103, 104.4, 104.6, 104.8, 105.4, 106, 107.5, 109.2, 109.4, 109.5, and 110 - 115; and is revised by deleting the references to the "International Energy Conservation Code (IECC)", "International Property Maintenance Code (IPMC)", "International Private Sewage Disposal Code (IPSDC)", "International Residential Code (IRC)" and "International Wildland-Urban Interface Code (IWUIC)";

(2) in Chapter 1, Section 101.2 (Scope) of the IBC, the last sentence of the paragraph is revised by adding "as governed by the provisions of AS 18.70.080": and the exception is revised to read as follows;

"Exceptions;

1. Detached one-, two-, and three-family dwellings.

2. Multiple single-family dwellings (townhouses) not more than three stories above grade plane in height with a separate means of egress and their accessory structures. These structures shall be plan reviewed to the IBC. Fire walls between townhouses may be designed to meet Section 706 of the IBC or by two one-hour fire resistance-rated wall assemblies tested in accordance with Section 703.2.2 of the IBC.";

(3) Chapter 1, Section 104.2 (Applications and permits) of the IBC, is revised by deleting the words "and permits" from the heading, and the section is revised to read: "The building official shall receive applications and review construction documents for the on-site erection, alteration, demolition, and moving of buildings and structures and, at the agency's discretion, will inspect the premises to enforce compliance with the provisions of this code. Plans for construction occurring out of state or manufactured off site must be sealed by a registered design professional of this state and of appropriate discipline in accordance with AS 08.48 to have a plan review completed before the construction being placed on its foundation and all plan review deficiencies must be corrected before occupancy of the facility.";

(4) Chapter 1, Section 105 (Permits) of the IBC, is revised by deleting the heading and replacing it with "Application for Plan Review";

(5) Chapter 1, Section 105 (Permits) of the IBC, is revised by replacing the word "permit" wherever it occurs with the words "plan review";

(6) Chapter 1, Section 105.2 (Work exempt from permit) of the IBC, Item 2 is revised to read: "2. Fences.", and Section 105.2 is also revised by adding a new Item 14 to read: "14. Buildings classified as a Group U Occupancy, other than those in Appendix LL, that are not offered for use by persons other than the property owner or the owner's employees, not open to the public, and not containing hazardous materials in excess of those found in Tables 307.1(1) and 307.1(2). This exemption includes buildings in which the public has no access, such as farm, dairy operations, or greenhouse operations.";

(7) in Chapter 1, Section 105.3 (Application for permit) of the IBC, the first sentence is revised to read: "To obtain a plan review approval, the applicant must first file an application in writing on a form furnished for that purpose by the code enforcement agency.";

(8) Chapter 1, Section 107 (Submittal documents) of the IBC, is revised by replacing the word "permit" wherever it occurs, with the words "plan review";

(9) Chapter 1, Section 107.2.2 (Fire protection system shop drawings) of the IBC, is revised by adding the sentences 'Shop drawings shall be sealed by a registered design professional of this state and of appropriate discipline in accordance with AS 08.48, or shall be signed and dated by a fire systems permit holder under AS 18.70.090 and 13 AAC 50.035. At least two sets of shop drawings shall be submitted. The building official shall retain one set, and one approved set stamped by the building official shall be retained on site during the installation of the system." at the end of the section;

(10) Chapter 1, Section107.3.1 (Approval of construction documents) of the IBC, is revised to read: "One set of bound or one electronic set of construction documents so reviewed shall be retained by the building official.";

(11) Chapter 1, Section 109 (Fees) of the IBC, is revised by replacing the word "permit" wherever it occurs, with the words "plan review";

(12) Chapter 1, Section 109.3 (Building permit valuation) of the IBC, is revised to read: "Building plan review valuations. The applicant for a plan review involving an addition to an existing structure, a remodel of an existing structure, or a fuel system shall provide an estimated building construction value at the time of application. The valuation shall include the total value of work, including materials and labor for which the plan review is being issued. The total value of work must include the electrical, gas, mechanical, and plumbing equipment and permanent systems, including fire protection systems. If, in the opinion of the building official, the valuation is underestimated on the application, the building official shall deny the plan review, unless the applicant can show detailed estimates that meet the approval of the building official. The building official shall set the final building construction valuation.

The valuation for all new construction not involving remodel work or additions to existing structures must be based on the valuation schedule established in 13 AAC 50.027.";

(13) Chapter 2, Section 202 of the IBC, is revised by adding a definition to read: "EXISTING BUILDING (EXISTING CONSTRUCTION OR EXISTING STRUCTURE). Any building or structure

(A) for which the start of construction commenced before the earlier of

(i) the effective date of the community's first code, ordinance. or standard; or

(ii) December 5, 1956; or

(B) that received a legal building review. The certificate of fire and life safety or plan review number shall be provided."

(14) Chapter 2, Section 202 of the IBC, is revised by adding a definition to read: "NONCOMPLIANT OR UN-REVIEWED EXISTING BUILDING. Any building or structure for which the start of construction commenced without a legal plan review after the earlier of

(A) the effective date of the community's first code, ordinance, or standard; or

(B) December 5, 1956.";

(15) Chapter 2, Section 202 of the IBC, is revised by adding a definition to read; "RELOCATABLE CAMPS. A camp that is disassembled and loaded on a trailer to relocate or a camp that is on a skid or wheels as a single unit and pulled by a vehicle without separating.";

(16) Chapter 3, Section 305 (Educational group E) of the IBC, is revised by adding a new Section 305.2.4 to read: "305.2.4 Family child care homes. Family child care homes occupied as their primary residence (Group R-3) operating between the hours of 6:00 a.m. and 10:00 p.m. may accommodate a total of 12 children of any age without conforming to the requirements for Group E occupancy, except for fire extinguishers as required by Section 906. smoke alarms as required by Section 907.2.11.2, carbon monoxide alarms as required by Section 908, means of egress requirements of Section 1003, and emergency escape and rescue openings, as required by Section 1029, in napping or sleeping rooms, and fire extinguisher requirements as described in the International Fire Code (IFC), as adopted by reference in 13 AAC 50.025, including children related to the staff All stories that are not at grade plane shall have access to two exits.";

(17) Chapter 3, Section 305 (Educational group E) of the IBC, is revised by adding a new Section 305.4 to read: "305.4 Combination shops. Shop classrooms that combine wood working with any other fabrication using flame or causing spark shall be considered an F-1 occupancy and must be separated from the E occupancy in accordance with Table 602.";

(18) Chapter 4, Section 412.3.1 (Exterior walls) of the IBC, is revised by deleting "30 feet (9144 mm)" and replacing it with "20 feet (6,098 mm)";

(19) Chapter 4 (Special detailed requirements based on use and occupancy) of the IBC is revised by adding new Sections 429 (Special security requirements for elevated buildings) to read:

SECTION 429

SPECIAL SECURITY REQUIREMENTS FOR ELEVATED BUILDINGS

429.1 All elevated buildings with the lower floor level above grade and open on the sides must be fenced around the building exterior or have skirting below the exterior walls to prevent unauthorized access, if a building is higher than two foot to the underside of floor framing.

Exceptions:

1. Normally unoccupied buildings;

2. Buildings of F, H, S, and U occupancies;

3. All occupancies within an industrial area that is secured and there is no public access.

(20) Chapter 5, Section 501 (General) of the IBC, is revised by adding a new Section 501.2 to read: "501.2 Location on property. Buildings must adjoin or have access to a permanent public way or yard on not less than one side. Required yards by this section must be permanently maintained.";

(21) Chapter 5, Table 509.1 (Incidental uses ) of the IBC, is revised by changing the wording in the first block under the left column to read: "Furnace rooms in Group E, I, and R-1, R-2, R-3, and R-4 occupancies regardless of Btu input, and furnace rooms of all other occupancies where the largest piece of equipment is over 400, 000 Btu per hour input";

(22) Chapter 7, Section 706.6 of the IBC, is revised by adding a paragraph before the exceptions to read: "If buildings are constructed on pilings, the first floor is above ground, and the area below is completely open to the outside (not affected by skirting), a fire wall may terminate at the first floor level if it complies with the following:

1. The wall must terminate on a structural support that extends completely the length of the wall.

2. The structural support must rest upon and be completely supported by pilings.

3. The rest of the fire wall must comply with IBC Section 706.2.

4. If there is concealed space between the structural supports that are directly supported by piles, the concealed space must have the same fire wall protection rating for the depth of the concealed space.";

(23) Chapter 7, Section 718.4.2 (Groups R-1 and R-2) Exception 3 of the IBC, is revised by adding a new sentence at the end of the exception to read: " Adequate cross ventilation must be provided in accordance with Section1202.2.1.";

(24) Chapter 9, Section 901.5 (Acceptance tests) of the IBC, is revised by-adding a new sentence at the end of the paragraph to read: "Within 30 days after the completion of the installation, a copy of the acceptance test certificate must be forwarded by the firm conducting the test to the division of fire and life safety' or the deferred authority having jurisdiction.";

(25) Chapter 9, Section 903.2.3 (Group E) of the IBC, is revised to read: "Group E. An automatic sprinkler system must be provided throughout all buildings with Group E occupancies. The use of a fire wall or barrier does not establish a separate building or fire area for purposes of this section.

As determined by the building official, an automatic fire-extinguishing system approved under Section 904 shall be installed in a Group E occupancy in accordance with Section 903.2.3 whenever alterations or additions are made to an existing structure containing a Group E occupancy.

Exception: Buildings with Group E occupancies having an occupant load of 50 or less.

An automatic sprinkler system must also be provided for every portion of educational buildings below the level of exit discharge.

Family child care homes that are licensed to care for more than five persons between the hours of 10:00 p.m. and 6:00 a.m. must be equipped with an automatic sprinkler system designed and installed as described in Section 903.3.1.3 or an equivalent system approved by the building official.";

(26) Chapter 9, Section 903.2.8 (Group R) of the IBC, is revised to read: "903.2.8 Group R. An automatic sprinkler system installed in accordance with Section 903.3 shall be provided throughout buildings containing Group R occupancies as provided in this section.

903.2.8.1 Group R-1. An automatic sprinkler system shall be provided throughout all buildings that contain an R-1 occupancy.

903.2.8.2 Group R-2. An automatic sprinkler system shall be provided throughout all buildings that contain an R-2 occupancy.

Exceptions:

1. Buildings that are no more than two stories in height, including basements and contain four or fewer dwelling units.

2. Buildings that are no more than two stories in height. including basements and contain 16 or fewer sleeping rooms.

For the purpose of this section, fire walls may be used to create up to three separate attached buildings. Any additional buildings must be physically separated in accordance with IBC Table 602.

903.2.8.3 Group R-4. A 13R automatic sprinkler system shall be provided throughout all buildings that contain an R-4 occupancy.";

(27) Chapter 9, Section 903.3.6 (Hose threads) of the IBC, is revised by deleting "the fire code official" and replacing it with "AS 18.70.084";

(28) Chapter 9, Section 904.1 (General) of the IBC, is revised by adding a new sentence at the end of the paragraph to read: "Within 30 days after the completion of the installation, a copy of the acceptance test certificate must be forwarded by the firm conducting the test to the division of fire and life safety or the deferred authority having jurisdiction.";

(29) Chapter 9, Section 906.1 (Where required) of the IBC, is revised by deleting the exception in item 1;

(30) Chapter 9, Section907.2.3 (Group E) of the IBC, Exception 1 is revised by replacing "50" with "49";

(31) Chapter 9, Section 907.2.3 (Group E) of the IBC, is revised by adding a second paragraph after the exceptions to read: "Rooms used for sleeping or napping purposes within a day care use of a Group E occupancy must be provided with smoke alarms that comply with Section 907.2.11.2.";

(32) Chapter 9, Section 907.2.9 (Group R-2) of the IBC, is revised by adding a new Section 907.2.9.4 to read: "907.2.9.4 Remote camps. Any camp that is located outside a fire department service area shall be equipped with an automatic smoke or fire detection system that activates the occupant notification system in accordance with Section 907.5 throughout buildings that are used for sleeping purposes.";

(33) Chapter 9, Section 907.2.11.5 (lnterconnection) of the IBC, is revised by adding a new paragraph to read: "If more than 12 smoke alarms are interconnected the interconnecting means must be supervised in accordance with NFPA 72.";

(34) Chapter 9, Section 907.7.2 (Record of completion) of the IBC, is revised by adding a new sentence to read: "Within 30 days after completion of the installation, a copy of the acceptance test certificate verifying completion in accordance with NFPA 72 must be forwarded by the firm conducting the test to the division of fire and life safety or the deferred authority having jurisdiction.";

(35) Chapter 9, Section 907.8 (Inspection, testing and maintenance) of the IBC, is revised by adding a new Section 907.8.1 to read: "907.8.1 camp relocations. On each portable or relocatable camp move, an electrician certified under AS 18.62 may disconnect and reconnect the fire alarm system. The camp must be certified by an appropriate fire system permit holder under AS 18.70.090 and 13 AAC 50.035 to provide documentation that the system has been placed back in service and is ready for operation. System certification documentation is to be retained on site and available for review upon request. Annual requirements are still required under the code as adopted by reference in 13 AAC 50.025.";

(36) Chapter 9, Section 909.18 (Acceptance testing) of the IBC, is revised by adding a new sentence at the end of the paragraph to read: "Within 30 days after the completion of the installation a copy of the acceptance test certificate must be forwarded by the firm conducting the test to the division of fire and life safety or the deferred authority having jurisdiction.";

(37) Chapter 10, Table 1020.2 (Corridor fire-resistance rating) of the IBC, is revised by inserting a superscript "e" footnote reference after "R" in the "occupancy" column and is revised by adding footnote "e" to read: "R occupancies with an occupant load greater than 10 shall have one-hour rated corridors when the R occupancies are allowed to not have a sprinkler system and

1. serve four or fewer dwelling units or 16 or fewer sleeping rooms; and

2. are not more than two stories.";

(38) Chapter 10, Section 1031.2 (Where required) of the IBC, is revised by replacing the first sentence to read: "In addition to the means of egress required by this chapter provisions shall be made for emergency escape and rescue openings in Group R and I-1 occupancies.";

(39) Chapter 10, Section 1031.2 (Where required) of the IBC, is revised by deleting Exceptions 1 and 3;

(40) Chapter 11, Section 1101.1 (Scope) of the IBC, is revised to read: Compliance with the requirements of this chapter and other provisions within this code for accessibility of persons with disabilities is the exclusive responsibility of the owner of the structure or design professional of record.";

(41) Chapter 16, Section 1601.1 (Scope) of the IBC, is revised by adding a second paragraph to read; "This chapter is adopted as design criteria for the structural safety of buildings constructed under this code. The division of fire and life safety does not perform review for conformance with these criteria. Compliance with the requirements of this chapter, other provisions in this code for structural design, local government flood reduction ordinances, and federal oversight and authority through the Federal Emergency Management Agency (FEMA) National Flood Insurance Program (NFIP) under 44 C.F.R. Parts 59 and 60 is the exclusive responsibility of the building owner or design professional of record. Information regarding the National Flood Insurance Program is available from the Department of Commerce, Community, and Economic Development, division of community and regional affairs at https://www.commerce.alaska.goy/web/dcra/PlanningLandManagement/FloodplainlVlaDagement.aspx. Information on approaches and grants for mitigating natural hazards in construction, including seismic hazards, is available through the Department of Military and Veterans' Affairs, division of homeland security and emergency management at http://www.ready.alaska.gov.";

(42) Chapter 17, Section 1701.1 (Scope) of the IBC, is revised by adding a second paragraph to read: "The provisions of this chapter are adopted as criteria to guide the owner and the registered design professional in meeting the tests and special inspections necessary to assure conformance with the applicable standards adopted under this code. Tests and inspections required by this code are not performed by the division of fire and life safety, but are the responsibility of the building owner or design professional of record. The findings of these tests and inspections must be kept for the life of the building.";

(43) Chapter 27, Section 2701.1 (Scope) of the IBC, is revised by adding a new sentence at the end of the section to read: "Electrical weather heads must be installed on the gable ends when a metal roof is installed.";

(44) in Chapter 31, Section 3103.1 (Temporary structures: General) of the IBC, the first sentence is revised to read: "The provisions of this section apply in deferred jurisdictions as allowed under 13 AAC 50.075 only, for structures other than tents and membrane structures, erected for a period of less than 180 days.";

(45) Chapter 31, Section 3103.2 (Construction documents) of the IBC, is revised by adding a second sentence to read: "Structures of less than 300 square feet in floor area that are designed for the specific purpose of providing an enclosure for non-hazardous equipment, and not containing hazardous materials in excess of those found in Tables 307.1(1) and 307.1(2) are not required to be sealed by a registered design professional.";

(46) Chapter 31 of the IBC is revised by deleting Section 3107 (Signs)

(47) the appendices of the IBC are revised by adding, after Appendix L and before Appendix M, Appendix LL to read:

"APPENDIX LL OIL AND GAS INDUSTRIAL PROCESSING BUILDINGS

LL101 General. These provisions have been established to provide engineering methods for the design and construction of hydrocarbon processing buildings in this state.

LL102 Scope. These standards augment and are used in conjunction with the respective requirements of the 2021International Building Code (IBC), International Mechanical Code (IMC), International Fire Code (IFC), and International Fuel Gas Code (IFGC) as the minimum requirements for occupancies (F, H, S, and U) when designing and constructing hydrocarbon (facilities that are directly connected with the transport or processing of oil and gas or by-products) buildings in this state. These standards apply to industrial occupancies attached to H-2 buildings such as the following: control rooms, offices, break rooms, warehouses, generator enclosures, vehicle storage, and others as approved by the authority having jurisdiction.

LL102.1 Small unoccupied remote dedicated structures, shelters, and enclosures, such as a wellhead shelter (any item that is put over the top of the wellhead that totally encloses the wellhead), communications shelters (unoccupied buildings with no hazardous vapors, gases, or products open to the atmosphere within the structures and that are utilized solely for the housing of wires and their components), pigging enclosures, a meter building, and shut-down valve enclosures may be classified as a Group U occupancy if the following conditions are met:

1. The building is less than 1, 000 square feet;

2. The contents of the building include only meters, valves, or pipe work;

3. The building is not normally occupied more than once during a 12-hour period;

4. If the building exceeds 300 square feet, the building has at least two exits;

5. "Remote" means a location that is secured and has limited or no public access and where no other occupied non-oil and gas related buildings or structures are located within one half mile of a flare or emergency process safety blow down exhaust termination;

6. "Dedicated" means housing only equipment associated with a single activity such as metering or pigging.

LL102.2 Structures that meet the requirements of Section LL102.1 shall neither require conformance with IBC Section 1604.4 nor a professional engineer's registration number or seal on plans if all of the following conditions exist:

1. The building is less than 300 square feet;

2. The building is pre-manufactured;

3. The pre-manufactured building is based on the manufacturer's experience or the building has been load tested for the site location conditions.

LL102.3 Factory fabricated structures of less than 400 square feet in area, singularly or aggregate, that are designed for the specific purpose of providing an enclosure for non-hazardous equipment and not containing hazardous materials in excess of those found in IBC Tables 307.1(1) and 307.1(2) are exempt from plan review in accordance with IBC Section 105.2. Any structure shall not be occupied for any reason other than maintenance and service of equipment housed within the structure.

LL103 Hydrocarbon processing buildings are considered special industrial occupancies as defined in IBC Section503.1.1.

LL103.1 Module separation. Elevated pipe ways extending from a building need not be considered projections of the building.

LL103.1.1 Building extensions and service area platforms. Building extensions of hydrocarbon processing buildings into the yard include landings, platforms, stairs, vessels, vessel enclosures, tanks, and exhaust or intake hoods. Clear and unobstructed access for fire fighting is to be no less than 40 feet. Bridging between buildings must be designed to allow access and operation for fire fighting.

LL104 Stairs, landings, handrails, and guardrails. Stairs, landings, handrails, and guardrails must meet the minimum requirements of 8 AAC 61, as amended as of July 28, 2013 and as amended from time to time; these regulations supersede the respective requirements of the IBC.

LL104.1 Landings, floor level at doors. Floors or landings may be more than one inch lower than the threshold of doorways if an attempt is made to minimize the drop through the use of ramps at interior doorways as described in Section 1008.1.6 of the IBC.

LL104.2 Industrial areas that are fenced or guarded and not open to the public in group B, F, H, R-1, R-2, or S occupancies, balusters, horizontal intermediate rails, or other construction must not permit a sphere with a diameter of 21 inches (533 mm) to pass through any opening.

LL105 Construction specifics. The construction of hydrocarbon processing buildings must comply with Sections LL105.1 - LL105.3 of this code.

LL 105.1 Fire walls, fire-resistance rated exterior walls, fire barrier walls, and horizontal assembly continuity. When a fire wall is used to qualify under Section 705 of the IBC, the wall must comply with that section. If the fire wall, fire-resistance rated exterior wall, or fire barrier wall does not extend to the ground, the structural supports for the wall must rest upon and be completely supported by the pilings. If a horizontal assembly is not supported by the ground, it must rest upon and be completely supported by the pilings.

LL105.2 Tank support fireproofing. Fire proofing requirements for steel tank supports, as described in Section 5704.2.9.2.3 of the IFC 2021 Edition. as adopted by reference, may be waived by the authority having jurisdiction when justified, based on the remoteness of the facility and lack of public access, or analytical or empirical results indicating that sufficient heat could be transmitted to the permafrost to cause foundation settlement.

LL 105.2.1 Tank venting and relief requirements for tanks and pressure vessels storing class IB, class IC, class II, or class III liquids described in Sections 5704.2.7.3 and 5704.2.7.4 of the IFC 2021 Edition may be satisfied by the use of properly sized open vents without flame arrestors. When open vents are utilized they shall be configured to minimize the accumulation of snow and ice. This relief shall only apply to installation in cold climate locations. In this section, "cold climate locations" means locations with an American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) 99 percent design heating design temperature (dry bulb) of less than -25 degrees Fahrenheit. These figures shall be based on the values published by the American Society of Heating, Refrigerating and Air-Conditioning Engineers.

LL105.2.2 Bulk transfer and process transfer locations. Bulk transfer and process transfer operations must be conducted in approved locations. Tank vehicle transfer facilities shall be separated from buildings and above-ground tanks by a minimum distance of five feet (1, 524 mm) for Class I, II, and III liquids measured from the nearest position of any tank loading valve and meet the following requirements:

1. Adherence to an approved written company policy for transfer of flammable and combustible liquids;

2. Tank capacity of either the truck or tank must not exceed 15, 000 gallons;

3. The tank vehicle shall be located a minimum of 20 feet from tank connections, and a minimum distance of 25 feet from tank or building during transfer operations;

4. Tank fill connections must not be utilized to transfer liquids to tank vehicles.

LL105.3 Electrical or communication equipment shelters, wellhead valve shelters, and wellhead shelters. Neither fire separation distance between adjacent shelters, as described in IBC Table 705.5, nor thermal barrier requirements, as described in Section 2603.4 of the IBC, for fiberglass or metal sheeting used for construction of electrical or communication equipment shelters, wellhead valve shelters, and wellhead shelters are required if the following conditions are met:

1. The area of an individual shelter may not exceed 1, 000 square feet;

2. Fire separation distance shall be in accordance with IBC Table 705.5;

Exceptions:

(a) Combined fire separation distances between adjacent individual electrical or communication equipment shelters must be a minimum of six feet;

(b) Fire separation distance is not required between adjacent individual wellhead valve shelters, individual wellhead shelters, or a combination of those shelters;

3. Each wellhead shelter shall only enclose one wellhead;

4. Each wellhead valve shelter shall serve only one wellhead;

5. The electrical or communication shelter, wellhead valve shelter, or wellhead shelter must normally be unoccupied. It is understood that operators need to spend approximately 10 minutes per day taking readings in wellhead shelters and that maintenance is infrequently required. The most extensive maintenance is well wireline work. This work may extend to a week per well and occur once every several years per well. Most of this work is accomplished from outside the wellhead shelter. All maintenance is strictly controlled with a permit system.

LL106.1 Fire extinguishing system. An automatic sprinkler system as specified in IBC Section 903.2.5.1 or alternative automatic fire extinguishing system need not be provided in Group H-2 occupancy compressor modules, dehydration modules, metering modules and heater/separator modules if the following conditions are met:

1. The module under consideration primarily handles natural gas and its by-products;

2. The module is located within a secured site with controlled access;

3. The module is normally unoccupied;

4. Significant quantities of Class I or Class II liquids are not present;

5. The aggregate module area under consideration is less than 1, 500 square feet;

6. Module construction features panelized type exterior walls that will provide for venting in the event of over pressurization;

7. Combustible gas detection is provided;

8. A mechanical ventilation system capable of providing the following is provided:

i. Minimum four air changes an hour operating continuously;

ii. Minimum 12 air changes an hour upon detection of combustible or flammable vapors in excess of 20 percent lower flammable limit (LFL) (lower explosive limit (LEL));

9. Upon detection of combustible or flammable vapors in excess of 40 percent LFL (LEL) process safety management features are automatically initiated to reduce or eliminate the fuel load;

10. Module location complies with IBC Section 705.3.

LL106.2 Alternate automatic fire-extinguishing (AAFE). Automatic activation for gas detection (inerting or suppression agent) in areas of hydrocarbon processing buildings where (1) both fire and explosion hazards exist, (2) both fire and gas detection systems are (interconnected or independently, or both) installed, (3) the fire and gas detection devices alarm at a continuously staffed control room and trained operators can quickly respond to the fire and gas alarms following specific fire and gas alarm response procedures, and (4) collateral fire damage is likely to be minimal, the following alternate automatic fire-extinguishing (AAFE) operating activation mode is acceptable: Automatic activation of the alternate automatic fire-extinguishing (AAFE) system upon gas detection coupled with manual activation of the same alternate automatic fire-extinguishing (AAFE) system on fire detection is approved.

LL106.3 Manual activation of total flooding fire suppression systems. In areas where (1) the only hazard is fire, not explosion, (2) fire detection devices alarm at continuously staffed control rooms, (3) trained operators can quickly respond to the fire alarms following specific fire alarm response procedures, and (4) collateral fire damage is likely to be minimal, manual activation of the total flooding fire suppression agent is acceptable. These areas also include continuously staffed control rooms.

LL106.4 Platform width. In buildings protected with fire sprinkler systems, any platform that exceeds four feet in width or length is considered an obstruction for the purposes of the installation of sprinkler systems under Section 903.3.1.1 of the IBC.";

(48) the appendices of the IBC are revised by adding Appendix NN to read :

"APPENDIX NN REPAIRS TO BUILDING AND STRUCTURES DAMAGED BY THE OCCURRENCE OF A NATURAL DISASTER

NN101 Purpose. The purpose of this appendix is to provide a defined level of repair for buildings or structures damaged by a natural disaster in jurisdictions where the governor has declared a formal condition of disaster emergency under AS 26.23 by proclamation.

NN102 General. Required repair levels must be based on the ratio of the estimated value of the repairs required to restore the structural members to their pre-disaster condition to the estimated replacement value of the building or structure.

NN103 Structural repairs. When the ratio described in Section NN102 does not exceed 10 percent, as determined by design professionals who are professional architects or professional engineers who meet the requirements of AS 08.48, buildings and other structures, except essential facilities included as Category III buildings and other structures in Table 1604.5 (Risk category of buildings and other structures) of this code, must, at a minimum, be restored to their pre-disaster condition. When the ratio described in Section NN102 is greater than 10 percent but less than 50 percent, buildings and other structures, except essential facilities included as Category III buildings and other structures in Table 1604.5 of this code, must have the damaged structural members, including all critical ties and connections associated with the damaged structural members, all structural members supported by the damaged member, and all structural members supporting the damaged members repaired and strengthened to bring them into compliance with the force levels and connection requirements of this code. These requirements apply to those essential facilities when the ratio described in Section NN102 is less than 30 percent.

Exception: For buildings or structures with rigid diaphragms where the above-required repair and strengthening increases the rigidity of the resisting members, the entire lateral force-resisting system of the building or structure must be investigated.

When, in the opinion of the building official, an unsafe or adverse condition has been created as a result of the increase in rigidity, the condition must be corrected. When the ratio described in Section NN102 is greater than 50 percent, buildings and other structures, except essential facilities included as Category III buildings and other structures in Table 1604.5 of this code, must, at a minimum, have the entire building or other structure strengthened to comply with the force level and connection requirements of this code. These requirements apply to essential facilities when the ratio described in Section NN102 is greater than or equal to 30 percent.

NN104 Nonstructural repairs to light fixtures and suspended ceilings. Under all ratios calculated under Section NN102, when light fixtures and the suspension systems of a suspended acoustical ceiling are damaged, the damaged light fixtures and suspension systems must be repaired to fully comply with the requirements of Section 803.9 of this code."

Undamaged light fixtures and suspension systems must have the additional support and bracing that is required in Section 803.10 of this code.

13 AAC 50.020

Eff. 6/25/69, Register 30; am 2/21/71, Register 37; am 6/15/79, Register 71; am 1/14/81, Register 77; am 8/2/86, Register 99; am 10/28/90, Register 116; am 6/10/93, Register 126; am 3/7/96, Register 136; am 8/31/96, Register 139; am 3/27/99, Register 149; am 9/15/2001, Register 159; am 8/27/2004, Register 171; am 9/12/2007, Register 183; am 11/16/2012, Register 204; am 5/19/2017, Register 222, July 2017; am 10/28/2022, Register 244, January 2023

Copies of the International Building Code 2021 Edition (IBC) may be obtained from the International Code Council Inc., 25442 Network Place, Chicago, Illinois 60673-1254; telephone: (800) 786-4452; Internet address: www.iccsafe.org.

Authority:AS 18.70.080