Transcript Code Changes PowerPoint Presentation

2015 Significant Changes
to Residential Codes
w/Washington Amendments
and changes to Stormwater Regulations
Presented by
Building Industry Association of Washington
Instructors
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Jim Breidenbach, CGR/CAPS - [email protected]
Ted Clifton, CGB/MCGP – [email protected]
Daimon Doyle – [email protected]
Diane Glenn, CGP – [email protected]
Rick Hjelm, CGR – [email protected]
Annie O’Rourke, CGP – [email protected]
Participants will gain an
understanding of key changes for:
• 2012 to 2015 International Residential Code with
Washington Amendments
• 2012 to 2015 Washington State Energy CodeResidential
• Residential changes applicable to the
International Mechanical Code
• Low Impact Development per the NPDES
(National Pollution Discharge Elimination System)
Phase I and II Municipal Permits
• This class and presentation is not intended as
a substitute for the code books referenced.
This class and presentation is presented as a
resource to recognize significant changes and
locate them in the applicable code book.
• New codes become effective July 1, 2016
– Permit obtained up to June 30, 2015, structures
are built using existing (2012) codes;
– Permit obtained on or after July 1, 2016,
structures are built using the new (2015) set of
adopted codes.
Low Impact Development
• Stormwater Management Strategy focused on:
– Maintaining and restoring natural hydrology
– Protecting natural resources
– Fulfilling environmental regulations
• Goals of Low Impact Development
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Protect water quality
Preserve wetlands/stream functions
Encourage aquifer recharge
Create similar post-development hydrology to pre-development
Provide cost-effective stormwater management solutions
Low Impact Development
• Why is LID important?
– Ecology requires LID, where feasible, for Western
Washington Phase I & II municipal stormwater
permits effective August 1, 2013
– Local governments required to implement LID in
codes/ordinances
• Western WA Phase I jurisdictions –Adopted/Adopting
• Western WA Phase II cities and counties by GMA
update timelines - 12/31/16, a few in 2017-2018
• Eastern WA permit requires Phase II jurisdictions to
allow LID by 12/31/17
Important Deadlines
• Phase I – Seattle and Tacoma and King, Clark,
Pierce and Snohomish Counties
• 7/1/2014 – Submit drafts of LID incorporation in
development codes, rules, standards
• 12/31/15 – Adopt and make effective
• Phase II (Western WA) – 83 cities, and all or parts
of 5 counties
• 8/31/16 – Adopt updated development codes, rules,
standards, except for
• 6/30/17 Kelso, Longview, Centralia and Cowlitz Co – 6/30/18
for Aberdeen
• Phase II (Eastern WA) – 18 cities, parts of 6
counties 12/31/17 Make code changes if
necessary
Low Impact Development
• Get Technical Training
• http://www.wastormwatercenter.org/lidswtrainingprogram
• Finding out more
• Department of Ecology website www.ecy.wa.gov
• Ecology Guidance doc for integrating LID into local govs
• Ecology Stormwater General Permits
http://www.ecy.wa.gov/programs/wq/stormwater/municipa
l/PermitsPermitees.html
• Kitsap County LID Guidance Manual 2009 (kitsaplid.org)
• Stormwater Manual for Western WA 2012 (updated from
2005 version)
• LID Manual for Puget Sound 2012
www.psp.wa.gov/LID_GLG.php
• Western WA Hydrology Model 2012
• Rain Garden Handbook for Western WA 2013
2015 Washington State
Energy Code
Based on the 2015 International
Energy Conservation Code® (IECC®)
Special thanks to the staff of the WSU
Energy Program for their assistance
and providing graphics in this section
www.energy.wsu.edu
Mandate: Reduce building energy
consumption 70 percent over 25 years.
• The Washington state legislature and the Governor’s Office
have directed the State Building Code Council to adopt energy
codes to reduce energy use in newly constructed residential
and nonresidential buildings.
• Federal Law also requires the state to meet minimum energy
savings standards.
• Building energy efficiency is the single largest factor in the
region’s future electric needs.
• Reduction of 70% by 2030 as compared to the 2006
Washington State Energy Code
Residential Buildings
• For this code, residential buildings include
detached one- and two- family dwellings and
multiple single-family dwellings (townhouses)
as well as Group R-2, R-3 and R-4 buildings
three stories or less in height above grade.
• R102.1 Alternate materials – (IECC change)
retitled and reworded for consistency with
other model codes
– The provisions of this code are not intended to prevent the
installation of any material or to prohibit any design or
method of construction not specifically prescribed by this
code, provided that any such alternative has been approved.
The code official shall be permitted to approve an alternative
material, design or method of construction where the code
official finds that the proposed design is satisfactory and
complies with the intent of the provisions of this code, and
that the material, method or work offered is, for the purpose
intended, at least the equivalent of that prescribed in this
code.
For innovative ideas go to: www.ecobuilding.org/codeinnovations
• R104.2 Inspections
– Revised to list and describe the required insulation
inspections as:
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Footing and Foundation inspection
Framing and Rough-in inspection
Wall inspection
Plumbing Rough-in inspection
Mechanical Rough-in inspection
– Final inspection shall include verification of the
installation of all required building systems,
equipment and controls and their proper
operation and required number of high efficacy
lamps and fixtures
• Section 202 – Definitions (IECC changes)
– Alterations, Approved Agency, Conditioned Space
and Repair were revised for consistency with
other model codes.
– Circulating Hot Water System, Climate Zone,
Insulated Siding, Reroofing, Roof Recover, Roof
Repair and Roof Replacement are new
• R303.1.1 Insulation Identification (IECC
change) Requirement added for insulated
siding to be labeled with R-value similar to
other insulation products.
• R303.1.4.1 sets the rating standard for
insulated siding (IECC change)
– The thermal resistance (R-Value) of insulated
siding shall be determined in accordance with
ASTM C1363. Installation for testing shall be in
accordance with the manufacturer’s installation
instructions.
• R303.1.3 Fenestration Rating (IECC change)
– An exception was added to R303.1.3 allowing
garage doors to be rated in accordance with
DASMA 105. Some garage doors cannot meet the
NFRC size requirements and this will allow them
to test to an equivalent standard.
– Owner-built, non-operable wood frame window
consisting of a double pane unit with low-e, ½inch airspace with argon fill are allowed.
• R401 Compliance Options (State amendment
and IECC Change)
– Sections 401 through 404, Prescriptive Based
Compliance, was reorganized into General,
Building Thermal Envelope, Systems and Electrical
and Lighting
– Section R405, Performance Based Compliance,
based on simulated energy performance must also
with the mandatory items in 401-404
– Section R406 Additional Credits was expanded to
include ALL low-rise residential dwelling and
sleeping units.
R401.2 Tools for Compliance
• Prescriptive – WSU form
• Total UA Alternative – WSU form *
• Performance Approach – as required in R405
Check WSU’s Energy Code webpage for compliance
tool information as it becomes available:
www.energy.wsu.edu/code
*REScheck no longer available in WA State
Prescriptive Form (HANDOUT)
• R401.3 Certificate (IECC change) Editorial
changes for clarity, allows more flexibility in
the placement of the certificate.
– A wall in the space where the furnace is located, a
utility room, or an approved location inside the
building. (was within 3 feet of the electrical panel)
NOTE: No change to required content for
compliance certificate
• R401.3
Certificate –
Available
download on the
WSU Energy
Program Website
Footnote – Table R401.1.1
Insulation and Fenestration Requirements
•
c
"10/15/21 +TB" means R-10 continuous insulation on the exterior of the wall, or
R-15 on the continuous insulation on the interior of the wall, or R-21 cavity
insulation plus a thermal break between the slab and the basement wall at the
interior of the basement wall. "10/15/21 +TB" shall be permitted to be met with R13 cavity insulation on the interior of the basement wall plus R-5 continuous
insulation on the interior or exterior of the wall. "TB" means thermal break
between floor slab and basement wall.
• R402.1.2 R-Value Computation (State
amendment).
Insulation material used in layers, such as framing cavity
insulation or continuous insulation, shall be summed to
compute the corresponding component R Value. The
manufacturer’s settled R-Value shall be used for blown
insulation. Computed R-values shall not include an Rvalue for other building materials or air films. Where
insulated siding is used for the purpose of complying with
the continuous insulation requirements of Table R402.1.2,
the manufacturer must supply an ICC report that the Rfactor has been certified, or use R-5 per inch for extruded
polystyrene, and R-6 per inch for polyisocyanurate rigid
insulation.
• R402.1.5 Vapor Retarder Wall assemblies in
the building thermal envelope shall comply
with vapor retarder requirements (IECC
change and replaces language adopted
through state emergency rulemaking since last
code cycle)
– Wall assemblies in the building thermal envelope
shall comply with the vapor retarder requirements
of Section R702.7 of the IRC or Section 1405.3 of
the IBC, as applicable.
R-15 Batt
Vapor retarders
below grade are
not recommended
R-5 Foam
• R402.2.4 Access hatches and doors (IECC
Change) New exemption allows for vertical
doors that provide access to conditioned
space from unconditioned spaces to meet the
fenestration requirements in Table R402.1.1,
which is U.30
• R402.2.7 Floors. (IECC change) New language
allowing flexibility in the installation of floor
insulation added, allowing airspace between the
floor sheathing and the top of the insulation in
certain applications.
• Exceptions:
1. The floor framing cavity insulation shall be
permitted to be in contact with the topside of
sheathing or continuous insulation installed on the
bottom side of floor framing where combined with
insulation that meets or exceeds the minimum
Wood Frame R-value in Table R402.1.2 and extends
from the bottom to the top of all perimeter floor
framing members.
• R402.4.4 Combustion air openings (IECC) new
section requires that “where open combustion air
ducts provide combustion air to open
combustion, space conditioning fuel burning
appliances, the appliances and combustion air
openings shall be located outside of the building
thermal envelope, or enclosed in a room isolated
from inside the thermal envelope.”
– Two exceptions include: (1) direct vent appliances
with both intake and exhaust pipes installed
continuous to the outside and (2) fireplaces and
stoves complying with the IECC and Section R1006 of
the IRC.
• R402.4.1.1 Air Barrier and Insulation
Installation (IECC change) Table was revised
to show splitting of air barrier criteria and
insulation criteria in separate columns.
Concealed fire sprinkler criteria was added to
the table.
REVISED TABLE R402.4.1.1 Attached to Handout
• Concealed Fire Sprinklers (402.4.1.1 Table)
– When required to be sealed, concealed fire
sprinklers shall only be sealed in a manner that is
recommended by the manufacturer. Caulking or
other adhesive sealants shall not be used to fill
voids between fire sprinkler cover plates and walls
or ceilings.
• R402.4.1.2 Air Leakage Testing (State
amendment) No change to minimum
requirement of 5 Air Changes Per Hour (ACH)
New EXCEPTIONS Added:
1. Additions less than 500 square feet of
conditioned floor area.
2. Additions tested with the existing home having a
combined maximum air leakage rate of 7 ACH.
To qualify for this exception, the date of
construction of the existing home must be prior
to the 2009 WSEC.
Addition + existing house = 7.0 ACH
Existing
house
Addition
Addition only = 5.0 ACH
R403.3.1 Insulation (Prescriptive) (State amendment)
• Ducts outside the
building thermal
envelope shall be
insulated to a
minimum of R-8
(same).
• Ducts within a
concrete slab or in
the ground shall be
insulated to R-10 with
insulation designed to
be used below grade.
(was R-8).
2012 Duct Testing
2015 Duct Leak/Test
R101.3.2.1 Duct Testing
R403.3 Duct Leakage
No test required if ducts and air handler
are entirely in conditioned space
No Change
The test results shall be provided to the
building official and the homeowner
A written report of the results shall be
signed by the party conducting the test
and provided to the code official.
Duct Testing (R403.3.3)
Duct testing is not required when ducts
and air handlers are located entirely
within the building thermal envelope.
• A maximum of 10 linear feet of
return ducts and 5 linear feet of
supply ducts may be located outside
the conditioned space and still
qualify for this exception to testing.
• R403.4 Mechanical system piping insulation
(Mandatory) (State amendment) Requirement
of R-6 for mechanical systems adds an
exception which: allows for 200 feet of
hydronic piping to be insulated with ½-inch
insulation with a K value of .028.
(which equals R value of 3.35 – 3.5)
• R403.5.3 Hot water pipe insulation
(Prescriptive) Insulation for hot water pipe,
both within and outside the conditioned
space, shall have a minimum thermal
resistance of R-3.
– Exception: Pipe insulation is permitted to be
discontinuous where it passes through studs,
joists or other structural members and where the
insulated pipes pass other piping, conduit or
vents, provided the insulation is installed tight to
each obstruction.
• R403.5.1.1 thru 403.5.4 Service Hot Water
(IECC Change) the section on circulating
systems now prohibits continuously operating
circulation pumps and adds three new
sections to address heat trace systems,
demand recirculation systems and drain water
heat recovery systems -- if these energy saving
measures are employed.
R403.5.4 Drain water heat recovery units
Drain water heat recovery units
shall comply with CSA 55.2.
Drain water heat recovery units
shall be in accordance with CSA
55.1.
• R403.7 Equipment sizing and efficiency rating.
– New sentence added “New or replacement
heating and cooling equipment shall have an
efficiency rating equal to or greater than the
minimum required by federal law for the
geographic location where the equipment is
installed”.
• R403.7 Equipment sizing and efficiency rating
(IECC Change and State Amendment)
– Heating and cooling equipment shall be sized in
accordance with ACCA Manual S based on building
loads calculated in accordance with ACCA Manual J or
other approved heating and cooling calculation
methodologies. The output capacity of heating and
cooling equipment shall not be greater than that of
the smallest available equipment size that exceeds the
loads calculated, including allowable oversizing limits.
New or replacement heating and cooling equipment
shall have an efficiency rating equal to or greater than
the minimum required by federal law for the
geographic location where the equipment is installed.
• R403.7.1 Electric resistance zone heated units
(State amendment) All detached one- and twofamily dwellings and multiple single-family
dwellings (townhouses) up to three stories in
height above grade plane using electric zonal
heating as the primary heat source shall install an
inverter-driven ductless mini-split heat pump in
the largest zone in the dwelling. Building permit
drawings shall specify the heating equipment
type and location of the heating system.
– Exception: Total installed heating capacity of 2 kW per
dwelling unit or less.
NOTE: 1.0 Credit allowed for this option under Section
R406 3d still applies.
• R403.10 Pools and Spas (IECC change) section
was revised for consistency with the 2015
International Swimming Pool and Spa Code
(adopted by reference in Washington);
• R405.3 Performance-based compliance (State
amendment) The energy use adjustments in
Section R405.3 were changed based on the
additional point requirements of Section
R406.2
• R405.3 Performance Based Compliance (State
amendment) Changes to simulated energy
performance requirements per square foot of
conditioned floor area:
1. Less than 1500 sq. ft. from (97) to 80 percent
2. 1500 to 5000 sq. ft. from (89) to 72 percent
3. Over 5,000 sq. ft. from (83) to 66 percent
Exception: For structures serving Group R-2 occupancies, the
annual energy consumption shall be less than or equal to 85
percent of the annual energy consumption of the standard
reference design.
• R406.2 Energy Credit Table (State
amendment) adjustments include:
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New envelope option for triple pane windows
Air leakage option adjusted to 3.0
Credit for efficiency HVAC equipment adjusted from .5 to 1.0
Air source heat pump based on new federal requirements
Closed loop heat pumps reduced from 2.0 to 1.5
Efficient water heating revised based on new federal
standards
– Three new options added: central water heating in multifamily, condensing water heaters and drain water heat
recovery
– Renewable electric energy specifies per housing unit
• R405.4.2 Performance Based Compliance
(IECC Change) the documentation for showing
compliance with the performance-based
method, shown in Section R405.4.2 was
reorganized into three sections and clarified as
to how to submit a proposed design, when the
inspection takes place and what analysis is
necessary to show compliance (Attachment in
Handout)
• Change in Occupancy and Change in Space
Conditioning, new exception to both:
– Where the simulated performance option in
Section R405 is used to comply, the annual energy
use of the proposed design is permitted to be 110
percent of the annual energy use otherwise
allowed by Section R405.3.
• Section 5 Existing Buildings (IECC change). All
requirements for existing buildings were
consolidated and moved into a new section
(Section 5) and broken out into Additions,
Alterations, Repairs and Change of Use.
Historic Buildings are no longer exempt.
• R503.1.2 Heating and cooling systems. New
heating, cooling and duct systems that are
part of the alteration shall comply with
sections 403.1, 403.2, 403.3 and 403.6 (duct
insulation, sealing and testing). Exceptions:
1. Where ducts from an existing heating and cooling
system are extended, duct systems with less than 40
linear feet in unconditioned spaces shall not be
required to be tested in accordance with Section
R403.2.2
2. Existing duct systems constructed, insulated or sealed
with asbestos.
• R406 Additional Energy Efficiency
Requirements. Mandatory (State
amendment) Section was expanded to include
all low-rise residential dwelling and sleeping
units, not just IRC buildings, and increase
number of credits required for each dwelling
type.
1. Small dwelling unit less than 1500 sq. ft. in
conditioned floor area with less than 300 sq. ft of
fenestration area. Additions to buildings that are
greater than 500 sq. ft. of heated floor area but
less than 1500 sq. ft (.5) 1.5 credits
2. Medium dwelling unit that are not included in #1
or #3. (1.5) 3.5 credits
Exception: Dwelling units serving R-2 occupancies shall require
2.5 credits
3. Large dwelling units exceeding 5000 sq. ft. of
conditioned floor area (2.5) 4.5 credits
Exception: Dwelling units serving R-2 occupancies shall require
2.5 credits
4. Additions less than 500 sq. ft. .5 credits
Option 1a (Level 1)
U-.28 windows
and,
R-38 floor insulation
or,
Slab on Grade R-10
continuous
Or
Reduce Total UA by 5%
.5 Credits
Option 1b (Level 2)
U-.25 windows,
and,
R-21 + R-4 foam sheathing
and,
R-38 floor insulation,
or,
Slab on Grade R-10 continuous
Or
Reduce Total UA by 15%
1.0 Credits
Option 1c (Level 3)
U-.22 windows,
and,
R-21 + R-12 foam sheathing
and,
R-38 floor insulation,
or,
Slab on Grade R-10 continuous
Or
Reduce Total UA by 30%
2.0 Credits
Option 3a (Level 1)
U-.24 windows
.5 Credits
Option 2a (Level 1+?)
Reduce air leakage to 3.0
ACH50
Install good ventilation fan
.5 Credits
Option 2b (Level 2)
Reduce air leakage to 2.0
ACH50
Install HRV with efficiency
of .70
1.0 Credits
Option 2c (Level 3)
Reduce air leakage to
1.5 ACH50
Install HRV with
efficiency of .85
1.5 Credits
Option 3a (Level 1)
Install a high efficiency
furnace
AFUE 94% min.
Install a high efficiency
boiler
AFUE 92% min.
1.0 Credits
Option 3b (Level 1)
Install a high efficiency
heat pump
Min HSPF of 9.0
1.0 Credits
Option 3c (Level 3 = $$$)
Install a ground or water
source heat pump
Min COP of 3.3 (ground)
Min COP of 3.6 (water)
1.5 Credits
Option 4 (possibly Level 1)
All ducts, heating and
cooling components
inside the conditioned
space. Also includes
boilers and hydronic
piping, radiators, etc.
1.0 Credits
Option 5a (Level 1)
Install flow restrictor on kitchen
faucet and shower heads
.5 Credits
Option 5b (Level 1)
Install gas, oil, or propane
water heater. Min EF .74
1.0 Credits
Option 5c (Level 2)
Install gas, oil, or propane
water heater. Min EF .92
Solar water heating
Heat Pump water heater
1.5 Credits
Option 5d (Level 1 = $$$)
Install a drain water heat
recovery unit
.5 Credits
Option 6
Install a solar PV system
Up to 3.0 Credits
Table 406.2
How to meet the mark
Option(s)
Description
Points
2a, 3a, 4, 5a, 5b
Infiltration #1, Low Flow DHW, HVAC gas furnace, ducts
inside, Gas DHW
3.5
2a, 3a, 5a, 5c elec
Infiltration #1, Low Flow DHW, NG Furnace, HPWH
3.5
2a, 3a, 5a, 5c gas
Infiltration #1, Low Flow DHW, NG Furnace, .91 EF DHW
3.5
1a, 2a, 3a, 5a, 5b
Envelope #1, Infiltration #1, Low Flow DHW, HVAC gas
furnace Gas DHW
3.5
2a, 3b, 5a, 5c
Infiltration #1, Low Flow DHW, HP, HPWH
3.5
Appendix RA – This Appendix is informative and not part of
the code. RA –Recommended procedure for worst-case
testing of atmospheric venting systems under R402.4 or R405
conditions
Appendix RB – The provisions contained in this Appendix are
not mandatory unless specifically referenced in the adoptive
ordinance. RB – Solar-ready provisions – detached one-and
two-family dwellings, multiple single family dwellings
(townhouses)
Appendix RD – Exterior Design Conditions, Table C-1 Outdoor
Design Temperatures
• Resources and Links from the BIAW website
www.biaw.com
• Industry Issues Tab
• Select ‘Residential Building Codes and
Updates’
• State Building Code Council https://fortress.wa.gov/ga/apps/sbcc
2015 IRC Significant
Changes
Based on the 2015 International
Residential Code® (IRC®)
Chapters 1 and 2
ADMINISTRATION
R101.2 Scope – Accessory
Structures
• Maximum height from 2
to 3 stories
• Technical requirements
removed from definition
• Minimum area
requirements removed
R104.11 Alternative Materials,
Design and Methods of
Construction and Equipment
Building Official must give written
explanation of disapprovals
R105.3.1.1
Determination of substantially
improved or substantially damaged
existing buildings in flood hazard areas
• Alterations and Repairs
added to list of
applications needing
determination of value
• Determination is
responsibility of the
building official, removes
board of appeals
• Shall “prepare” to Shall
“make a determination”
Flooding in Lewis County
R106.1.4
Construction
documents
for dwellings
in Coastal A
Zones
Information for Construction
in Flood Hazard Areas.
• Special hazard area landward of
V Zone (wave < 3ft.)
• Include elevation of the bottom
of lowest horizontal structural
member
• Same as high hazard Zone V
• R322.3 Coastal high-hazard
areas
Chapter 3
BUILDING AND PLANNING
R301.2 Wind Design Criteria
• “Wind” added to design criteria
• “Wind-Born debris” added to regional
design criteria
• Now called nominal design wind speeds
R301.2.1.1.1 Sunrooms
Comply with
AAMA/NPEA/NSA
2100-12
Habitable and nonhabitable
Conditioned and
unconditioned
R301.2.1.4 Wind Exposure Category
• Wind Exposure Category A
deleted
• New Addition to Code:
– Wind Exposure Category D
•
•
•
•
•
Unobstructed areas > 5,000’
Open water
Mud and salt flats
Unbroken ice fields
Includes hurricane-prone
regions
R301.3 Story Height
• Story Height 11’7”:
– Wood and steel
wall framing
– Insulated
Concrete
– SIP walls
• Masonry wall height
is limited to 13’7”
R302.1 Exterior Walls
• Tables R302.1(1) and R302.1(2) Clarify that Projections are not allowed under
Exterior Wall Element
• Roof eave fire-resistance rating shall be permitted to be reduced to 0 hours on the
underside of the eave if fire blocking is provided from the wall top plate to the
underside of the roof sheathing or provided gable vent openings are not installed
R302.2 Townhouse Separation
• 2015 Code: R302.2 Townhouses. Each townhouse
shall be considered a separate building and shall be
separated by fire resistance rated wall assemblies
meeting the requirements of Section R302.1 for
exterior walls. Common walls separating townhouses
shall be assigned a fire resistance rating in
accordance with Section R302.2 Item 1 or Item 2.
• R302.2 Common walls separating townhouses must
be rated for 2 hours without a sprinkler system and 1
hour with a fire sprinkler
R303.7, R303.8
Stairway Illumination
• Interior and exterior
in separate sections
• Interior to illuminate
treads and landings
• Exterior light source
at top of landing
• Exterior bottom
landing accessing
basement
R304.1 Minimum Habitable Room Area
To accommodate the tiny house industry, the 120 square
foot minimum habitable area requirement has been
deleted
R305 Ceiling Height - Exceptions
No change - clarification
6 feet 8 inches
– Bathrooms
– Toilet rooms
– Laundry rooms
Modification: 6 feet 4
inches all basements:
– Beams
– Girders
– Ducts
– Other obstructions
R308.4.2 Glazing Adjacent to Doors
• Glazing installed
perpendicular to
a door
• < 24 inches from
door
• Safety glazing if
on hinge side of
an in-swinging
door.
R308.4.5 Glazing and Wet Surfaces
Not safety glazing when > 60in. From edge of
Bathtub
Hot tub
Spa
Whirlpool
Swimming pool
Shower
Sauna
Steamroom
R308.4.7 Glazing
Adjacent to the
Bottom Stair
Landing
• Applicable to the
plane of the bottom
tread.
R311.1 Means of Egress
• Required egress
door
– Open directly into
a public way or to
a yard or court
that opens to a
public way
R311.7.3, R311.7.5.1 Stair Risers
• Vertical rise in
stairway
without
intermediate
landing
increased from
144 to 147 in.
• Open risers
permitted on
spiral stairways
R311.7.10.1 Spiral Stairways
• Definition omits required center
post to allow for design flexibility
• Limits radius at the walk line to a
dimension not greater than 24.5
inches.
• Measurement for tread depth
now matches the winder
provisions
– Measures at the intersection
of the walk line and the tread
nosings rather than
perpendicular to the leading
edge of the tread
– 6 ¾ in. vs. 7 ½ in.
R311.4, 311.7.11, R311.7.12 Alternating
Tread Devices and Ship Ladders
• Added to the stair
provisions
• Washington
Amendment
allows for use as a
means of egress
within an
individual
dwelling unit for
access to areas of
200 sq. ft or less.
R311.8 Ramps
• Ramps serving as the required
egress door:
– Max. 1:12 slope
– Unless infeasible
• Other ramps:
– Max. 1:8 slope
R312.1.2 Guard Height
• Deletes
provision for
measuring guard
height from
surface of
adjacent fixed
seating
• Measure from
Deck Floor, not
fixed seating
height
R314 Smoke Alarms
(Safe, Reliable and Most Economical Fire Fatality
prevention device available)
• Battery-operated permitted for
alterations, repairs and additions
• Addresses alarms installed near
bathrooms and cooking appliances
• Household fire alarm systems no
longer require monitoring by an
approved supervising station
R314 Smoke Alarms
• R314.3 Location
– 4. > 3ft horizontally from door of a bathroom
• R314.3.1 Minimum distance from cooking appliances
Type of Alarm
Separation
Ionization
20 Ft
Ionization with alarmsilencing switch
10 ft
Photoelectric
6 ft
R315 Carbon Monoxide Alarms
• CO alarm in bedroom
with fuel-fired
appliance in the
bedroom or
adjoining bathroom
• Requires one alarm
on each level
R315 Carbon Monoxide Alarms
(continued)
• Power supplied by house wiring with battery
backup
• Battery-operated permitted for alterations,
repairs, and additions to existing buildings
• Exterior work no longer triggers CO alarm
provisions for existing buildings (decks)
• CO detection systems only require detectors in
locations prescribed by the code (NOT NFPA
720)
R326 Swimming Pools, Spas and Hot Tubs
• The design and construction of pools and spas shall
comply with the INTERNATIONAL SWIMMING POOL
AND SPA CODE (ISPSC)
• Appendix G Swimming Pools, Spas and Hot Tubs
Chapter 4
FOUNDATIONS
R403.1.1 Minimum Footing Size
• Expanded Tables
– Minimum width and thickness
– Based on type of construction
– Number of stories
– Table attached
Minimum Required Footing Example
• Two-story house with slab on grade foundation:
– Light-frame construction
– Soil-bearing strength @ 1500 psf
– Roof live load @ 20 psf
– 32ft wide building with interior load-bearing wall
R403.1.2, R602.10.9.1 Continuous Footings
in Seismic Design Categories D0, D1 and D2
• Move all information into Section R403.1.2
• Continuous footing – interior brace wall
panels
•
•
•
Plan dimension greater than 50 ft
2-story in Seismic Design Category D2
Exceptions
IRC Seismic Design Categories
R403.1.6 Foundation Anchorage
•
•
•
Anchor bolts required
to be in the middle
third of sill plate
Measured to edge of
bolt
(Optimum 1 ¾ in.)
Chapter 5
FLOORS
R502.10
• Header joist and
trimmer
connections deleted
• This section
conflicted with
Section R502.6
which contains
minimum bearing
lengths for all joists
and headers
• Framing of Floor Openings
R507.1, R507.4 Decking
Max deck joist spacing for common
decking materials
R507.2 Deck Ledger Connection to Band Joist
>Reorganization of Section
>Clarification of minimum requirements
R507.2.4
Alternative Deck
Lateral Load
Connection
Optional Connections
• Figure 507.2.3(1)
• Two hold-down
devices < 2ft of
the ends of the
deck.
• Figure 507.2.3(1)
Four hold downs
installed below the
deck structure
R507.5, R507.6, R507.7 Deck Joists
and Beams
• Prescriptive
methods for
joists and beams
in deck
construction.
• Spans & bearing
requirements
R507.8 DECK POSTS
• Minimum
sizes of wood
posts
supporting
wood decks
• Lateral
restraint at
bottom
Table R602.3(1) Fastening Schedule
• Provides multiple nail size options
• Includes ‘gun nails’
• Uses dimensions of commonly used power
driven, box and common nail sizes
• Fastening Schedule Table attached
Chapter 6
Wall Construction
Table R602.7.5 Minimum Number of Full
Height Studs at Each End of Headers in
Exterior Wall
• By Washington Amendment, this table was not
adopted
Chapter 7
WALL COVERING
R703.4 – Flashing Washington Amendment
(Washington Amendment)
Approved corrosion-resistant flashing shall be applied shingle-fashion in a
manner to prevent entry of water into the wall cavity or penetration of
water to the building structure framing components. Self-adhered
membranes used as flashing shall comply with AAMA 711. Fluid-applied
membranes used as flashing in all exterior walls shall comply with AAMA
714. The flashing shall extend to the surface of the exterior wall finish.
Approved corrosion-resistant flashing shall be installed at all of the
following locations:
1. Exterior window and door openings. Flashing at exterior window door
openings shall extend to the surface of the exterior wall finish or to the
water resistive barrier complying with Section 703.2 for subsequent
drainage. Mechanically attached flexible flashings shall comply with
AAMA 712.
All Flashing requirements in 2-7 remain the same.
R703.10.2 – (Washington Amendment)
Fiber-cement lap siding having a maximum width of 12 inches (305mm)
shall comply with the requirements of ASTM C1186, Type A, minimum
Grade II or ISO 8336, Category A, minimum Class 2. Lap siding shall be
lapped a minimum of 1 ¼ inches (32mm) and lap siding shall be installed in
accordance with the manufacturer’s installation instructions or shall be
designed to comply with Section R703.1. Lap siding courses shall be
installed with the fastener heads exposed or concealed, in accordance with
Table R703.3(1) or approved manufacturer’s instructions.
NEW SECTION – includes setbacks and
building separation due to radiant
heat issues
• Insulated vinyl siding – continuous
insulation and improved moisture
control
• Polypropylene siding requires
separation:
•
5 foot lot lines
•
10 foot building on other lot
• Specific fastening requirements
Additional R-5 required to conform with Energy Code
Chapter 8
ROOF-CEILING CONSTRUCTION
Tables R802.4, R802.5 Ceiling Joist and
Rafter Tables
•
•
•
Change to maximum spans for lumber
Changes to Southern Pine, Douglas Fir-Larch and Hemlock
Fir capacities
Tables Attached
R806.1 Attic Ventilation
Change deletes exception allowing the building official to waive
ventilation requirements due to atmospheric or climatic
conditions.
Three ways to meet code for unvented attics:
1. Air impermeable insulation directly under roof sheathing
2. Air impermeable insulation on underside of structural roof
sheathing and air permeable under impermeable insulation
of sheathing.
3. Air impermeable insulation above roof sheathing and air
permeable on underside of impermeable insulation.
Chapter 9
ROOF ASSEMBLIES (BALLARD LIBRARY)
Part 5
MECHANICAL
Whole House Ventilation Standards
State requirements are very close to
ASHRAE Standard 62.2
• Requires fan flow testing
• Allows for an infiltration credit which
may or may not lower flow rate
Outdoor Air
Flow Rates
M1507.3.4.4 ((Outdoor air inlets. Outdoor air shall be distributed to)) Ventilation openings. Each
habitable space ((by individual)) shall be provided with outdoor air inlets or operable windows with an
openable area not less than 4 square inches of net free area of opening for each 10 cfm of outdoor air
required by Table M1507.3.3(1). Where outdoor air supplies are separated from exhaust points by doors,
provisions shall be made to ensure air flow by installation of distribution ducts, undercutting doors, installation
of grilles, transoms, or similar means. Doors shall be undercut to a minimum of 1/2 inch above the surface of
the finish floor covering.
Individual room outdoor air inlets shall:
1. Have controllable and secure openings;
2. Be sleeved or otherwise designed so as not to compromise the thermal properties of the wall or
window in which they are placed;
3. ((Provide not less than 4 square inches of net free area of opening for each habitable space.)) Any inlet
or combination of inlets which provide 10 cfm at 10 Pascals are deemed equivalent to 4 square inches net
free area.
((Inlets)) Ventilation opening shall be screened or otherwise protected from entry by leaves or
other material. ((Outdoor air inlets)) Openings shall be controllable, securable and shall be designed to not
compromise the thermal properties of the building envelope. Ventilation openings shall be located so as not to
take air from the following areas:
1. Closer than 10 feet from an appliance vent outlet, unless such vent outlet is 3 feet above the outdoor
air inlet.
2. Where it will pick up objectionable odors, fumes or flammable vapors.
3. A hazardous or unsanitary location.
4. A room or space having any fuel-burning appliances therein.
5. Closer than 10 feet from a vent opening of a plumbing drainage system unless the vent opening is at
least 3 feet above the air inlet.
6. Attic, crawl spaces, or garages.
7. Asphalt roofs unless it is shown that no other location is permissible. In such cases the inlet opening
shall be located a minimum of 2 feet from the nearest surface of the asphalt roofing, measured from the
intake opening.
Outdoor Air
OR
Outdoor Air
Outdoor air intake shall not
be placed on an asphalt roof
unless no other location is
permissible
Appendix R Light Straw-Clay Construction
• New Addition to Code
• Prescriptive provisions
• Light straw-clay walls are nonbearing infill around a
structural frame
Appendix S Strawbale Construction
• New Addition to Code
• Prescriptive provisions for strawbale construction
• Strawbale walls may be bearing walls or nonbearing infill
around a structural frame depending upon the method of
construction and detailing.
• Appendix S contains requirements for both construction
methods.
IRC Appendix “U” Solar-Ready
Provisions, approved by the SBCC
– Solar Ready Zone: a section or sections of the roof or building overhang
designated and reserved for the future installation of a solar photovoltaic or
solar thermal system.
– Not mandatory- available for local adoption.
– Reserves a zone on the roof of a house with solar
access for future installation
• Area shall be not less than 300 sq ft exclusive of
mandatory access or set back areas as required by
the International Fire Code
– Saves homeowner money if they choose solar at a
later date
• No re-routing of plumbing vents, chimneys or
other obstructions
*Effective July 1, 2016
Making Solar Affordable and
Attractive to Homeowners
• Solar PV systems may be
installed on existing
houses that meet the
height/weight limits and
fire access requirements.
– Saves the homeowner up to
$2500 in additional costs
– Can reduce project time by up
to 8 weeks
– “Over the counter” or online
permits expedite the process
Installing a PV
system qualifies for
energy credits
required by code.
• Elimination of engineering
calculations if solar PV
systems meet certain
requirements-IRC M2302
Washington State Amendments to the IRC
• Typically published by mid-March
• Available on the State Building Code Council
website [email protected]
• Print single sided on other than white paper
for visibility
• Insert into IRC Code book at relevant
Chapter and Section
•
•
•
•
Resources and Links from the BIAW website
www.biaw.com
Industry Issues Tab
Select ‘Residential Building Codes and Updates’
Emergency Rule – 502 Facilities
• Establish regulatory guidance
for marijuana processing or
extraction facilities as
permitted under Initiative 502.
• Emergency Rule provides for
construction permit and
operational requirements.
• SBCC has established a
Cannabis TAG (Technical
Advisory Group) to review
current and proposed rules to
the 2015 Fire Code.
The 2015 code changes related to cannabis growing and processing are found in both the Building Code
and the Fire Code
Building Code >Marijuana processing facilities are listed as a Group F-1 occupancy;
>Marijuana growing is removed from the list of Group F-1 occupancies;
>Definition of "greenhouse" is broadened to include structures used for cultivation, protection or maintenance
of plants and is classified as Group U.
Fire Code >Permits are required for cannabis extraction systems.
>Both an operational permit and a construction permit are required to use or install a cannabis extraction
system.
>A new chapter of the Fire Code, Chapter 38 - Marijuana Processing and Extraction Facilities - is adopted as an
emergency rule, but not as a permanent rule at this time.
Al Audette
Government Affairs and Codes Coordinator
Building Industry Association of Washington
(360)352-7800, Ext 163
(800)228-4229, Ext 163
Jan Rohila
Administrative Services Director
Building Industry Association of Washington
(360)352-7800, Ext 101 (800)228-4229 Ext 101
Attendees must understand that information provided in this class is made with no express or implied warranty
and that Building Industry Association of Washington and its instructors accept no liability or responsibility for
any errors or omissions in the content or for damages as a result of relying on information contained within this
class and powerpoint presentation.