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 2021
International 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.