12/29/16
Colorado Chapter of the International Code Council
How to Use this Guide
Check with your jurisdiction regarding type of submittal (paper or electronic) and for additional
requirements.Draw to scale and complete the following (hint: use graph paper with ¼” squares.
Example: ¼” = 1’).
1.
Complete this Building Guide
by filling in the blanks on page three and indicating which
construction
details will be used, and R value of insulation used.
2.
Provide Plot Plan
showing dimensions of your project or addition and its relationship
to existing
buildings or structures on the property. Show all easements and the distance
to existing property lines drawn to scale. See example on page 2.
3.
Provide Floorplans.
Drawn to scale. See example on page 5. Structural,
section view, elevation or other drawings may be
required.
4. Fill out a Building Permit Application.
The majority of permit applications are
processed with little delay. The submitted
documents will help determine if the
project is in compliance with building
safety codes, zoning ordinances and other
applicable laws.
This handout was developed by the Colorado
Chapter of the International Code Council as a
basic plan submittal under the 2015 International
Residential Code. It is not intended to cover all
circumstances. Check with your Department of
Building Safety for additional requirements.
The Colorado Chapter of the International Code Council is a
professional organization seeking to promote the public health,
safety and welfare to building construction. We appreciate your
feedback and suggestions. To obtain a master copy of this
building guide, please write to the Colorado Chapter of the
International Code Council, P.O. Box 961, Arvada, CO 80001.
http://www.coloradochaptericc.org
Building Guide
Smoke alarms and carbon monoxide
alarms are required.
1
Single Family Residential One Story Addition
12/29/2016
This handout was developed by the Colorado Chapter of
the International Code Council as a basic plan submittal
under the 2015 International Residential Code. It is not
intended to cover all circumstances. Check with your
Department of Building Safety for additional requirements.
Single Family Residential One Story Addition
2
Site Plan Example
Proposed
Addition
Concrete
Slab for
Garage
One
Story
Frame
5’ Utility Easment
Hometown Street
Note: Dimensions
are for reference
purposes only
1”=20’
5.5
25.5
20.0
20.0
75.0
75.0
9.5
40.0
40.0
131.0
26.0
24.2
131.0
30.0
45.8
Walkway
Concrete Drive
59.2
Note: A plot plan (plan view) showing the dimensions of your project or additions and its relationships to existing buildings or
structures on the property must be included. In addition to project dimensions, your plot plan must also show other details such as
post locations and spacing, joist and beam spans, and any other pertinent information not shown on the section drawing.
12/29/16
Building Section
Foundation: Engineered Design
Foundation: Detail A
Check one
(see page 4)
Vented
Unvented
Check one
Single Family Residential One Story Addition
3
This handout was developed by the Colorado Chapter of the
International Code Council as a basic plan submittal under
the 2015 International Residential Code. It is not intended
to cover all circumstances. Check with your Department
of Building Safety for additional requirements.
12
pitch ____
Provide roof tie downs
Solid 2x blocking between
rafters that are 2x12 or
greater
Note: Pre-engineered roof trusses
w/truss clips may be used in lieu of roof
structure shown.
Minimum 1x_____ridge board
Roof covering___________________
(example: Class A 3 tab shingles)
2x____rafters spaced____" O.C. or
(example: 2 x 12 Rafters Spaced 24" O.C.)
Sheathing___________________
(example:
1
/
2
" exterior plywood)
Siding________________
Wall sheathing_______
2x____studs @____ O.C.
2x__ Joists @ ____ O.C.
2x_____ceiling joists @ _____O.C.
Double 2x____top plate
Span________
Ceiling height_______
A
Diagonal wind bracing or braced wall panels
@ corners and each 20' of wall.
(example: 1 x 12)
(example: 2 x 8 @ 24" O.C.)
(example: 2 x 6)
(example: 23' 5")
(example: 8')
(example:
1
/
2
"
exterior plywood)
(example: 2 x 6 @ 24" O.C.)
(example: 2x10 @24" O.C.)
(example: lap or T-111)
Cont. 2x ____ sill plate
(example: 2 x 4) decay resistant
Note: Pre-engineered floor systems may be used and should
be installed according to the manufacturers installation
instructions.
18
"
minimum
Engineered Design:
Cassions may be required if your
site has swelling soils. A foundation designed by a
Colorado licensed architect or engineer may be required.
Footing size ____" x ____"
(example: 8" X 16" )
Wall width ______ "
(example: 8" )
Wall Insulation ______________
(example: R-20 Fiberglass Batts)
Ceiling Insulation ____________
(example: R-49)
Property Address:
Manufactured Trusses spaced____" O.C.
Note: Attic ventilation and
access may be required
Note: For roofs with slopes less than
4:12, follow manufacturer’s
instructions for low slope application
of roofing material.
Access
required
1x4” collar ties @ 48” o.c.
12/29/16
Crawlspace Foundation Detail A
Heads Up
Single Family Residential One Story Addition
4
1
/
2
" x 10" steel anchor bolts 6'-0" O.C. max., 7" min. penetration max.
12" from corner and 12" from each end of plate (min. 2 bolts per plate).
Finished grade
#4 rebar min. continuous top of stemwall & at footing
36” min.
or below frost
6" min.
Provide #4 rebar vert. @
4'-0" O.C. insert rebar into
concrete footing or key way
Bottom plate shall be
treated wood or
Foundation redwood
3"
Note: Maintain at least 18" clear between
the bottom of the floor joists to the grade
level of the crawlspace, and at least 12"
under a beam.
The crawlspace access must be a minimum
of 18" x 24" and be unobstructed.
Basement may require engineered design.
Site Plan
1. When drawing your plot plan
be sure to show the location
of electric, gas, sewer and water service lines. If you don’t
know where they are, call the Public Service Utility
Notification Center of Colorado, 1-800-922-1987 or 811.
They will come out and locate lines for you. Remember
to ask them about the cost.
2. Show where the existing
electric and gas meters are
located on your home. These meters may have to be
relocated and it is best to know this before you start
construction.
Floor Plan
1. Smoke alarms and CO alarms.
Smoke alarms are required
to be hardwired and interconnected in new and existing
bedrooms, halls and one on each level unless removal of
interior wall or ceiling finishes would be required. In this
case, battery operated devices are acceptable.
Carbon Monoxide alarms are required on each floor with
bedrooms. They are recommended to be located no farther
than 15 ft. from any bedroom entrance. Do not install
within 15 ft. of a fuel burning appliances. Follow
manufacture’s recommendations for location testing and
replacement.
2. Additions not to enclose
bedroom or basement
egress windows.
3. Safety glass is required
at specific locations.
When you draw in the location of the new
windows on the floor plan, the plan reviewer
can identify which ones require safety glass.
4. Heat is required
in all habitable rooms. Show
how the addition will be heated on the plan.
Electric Code
Existing electric service
may require an upgrade
or relocation. Indicate the size of your electric
service (the number on the main breaker) on
your plan. This can help the plan reviewer
determine if an upgrade is needed before you
start construction.
Roof Overframe
When constructing a new valley, use a
continuous
board under the bottom cut of
the new rafters to provide a solid nailing
surface. The board should be at least 2" thick,
nominal and should be at least as wide as the
base of the new rafter.
Insulate wall or floor
per Chapter 11, I.R.C
Sealed with 6 mil. polyethylene film
Interior grade
Concrete Encased Ground
required for new service
This handout was developed by the Colorado Chapter of the
International Code Council as a basic plan submittal under
the 2015 International Residential Code. It is not intended
to cover all circumstances. Check with your Department
of Building Safety for additional requirements.
12/29/16
Sample Floor Plan
Single Family Residential One Story Addition
5
NOTES:
A. New 3'-0" x 6'-8" door in existing wall
B. Existing door removed, opening covered with drywall both sides
C. New 7'-0" x 4'-0" cased opening (replaces existing window)
D. New patio door with tempered glass
E. New 6'-4" wide 4'-8" casement windows
F. Provide header sizes for openings. Example: (2) 2"x10"
headers at new window and door openings
G. Wall bracing method and location
Scale: 1/8” = 1’
G
G
GG
G
G
This handout was developed by the Colorado Chapter of the
International Code Council as a basic plan submittal under
the 2015 International Residential Code. It is not intended
to cover all circumstances. Check with your Department
of Building Safety for additional requirements.