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Prince William County - homeinspectionsva.comhomeinspectionsva.com/pdf/PWC_Deck_details.pdf · PRINCE WILLIAM COUNTY, VIRGINIA TYPICAL RESIDENTIAL DECK DESIGN SHEET 3 OF 17 G P T

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Page 1: Prince William County - homeinspectionsva.comhomeinspectionsva.com/pdf/PWC_Deck_details.pdf · PRINCE WILLIAM COUNTY, VIRGINIA TYPICAL RESIDENTIAL DECK DESIGN SHEET 3 OF 17 G P T

TYPICAL RESIDENTIAL DECK DESIGN

PRINCE WILLIAM COUNTY, VIRGINIA

Department of Development Services

Building Development Division

5 County Complex CourtPrince William, VA 22192-9201

703-792-6930SHEET 1 OF 17

TYPICAL RESIDENTIAL DECK DESIGN

PRINCE WILLIAM COUNTY, VIRGINIA

Department of Development Services

Building Development Division

5 County Complex CourtPrince William, VA 22192-9201

703-792-6930

Prince William CountyTypical Deck DetailsBased on Virginia Uniform Statewide Building Code ~ Version 2009-10-01

CONTENTS

General Notes........................................................2Ledger Fasteners...................................................11

Deck Framing Plan................................................3Rim Joist Attachment............................................11

Cross Section of Deck Connected to House.......4Built-Up Beam......................................................11

Free Standing Deck Framing Plan........................5Stairway Requirements..........................................12

Cross Section of Free Standing Deck..................6Tread, Riser, and Stringer Detail.........................12

Lateral Support of Free Standing Deck...............7Stairway Landing Details.......................................13

Framing Plan at Chimney or Bay Window...........8Stairway Connection to Deck................................14

Post-to-Beam Connection....................................8Handrail Details.....................................................14

Joist-to-Beam Connection...................................8Do Not Do's...........................................................15

Footing Details.......................................................9Stairway Illumination..............................................16Guardrail Post Connection.....................................9Clearances.............................................................16

Ledger Board Connection......................................10Inspection and Scheduling....................................17

Page 2: Prince William County - homeinspectionsva.comhomeinspectionsva.com/pdf/PWC_Deck_details.pdf · PRINCE WILLIAM COUNTY, VIRGINIA TYPICAL RESIDENTIAL DECK DESIGN SHEET 3 OF 17 G P T

PRINCE WILLIAM COUNTY, VIRGINIA TYPICAL RESIDENTIAL DECK DESIGNSHEET 2 OF 17

THINGS TO BRING FOR PERMIT

Important! Zoning Permit. You must bring a copy of your house location plan that shows the proposed

location of the deck, drawn to the same scale as the plan. Show the side yard and rear yard distances

(setbacks from property lines) on the plan.

NOTES ON DESIGN

·No changes shall be made to approved plans without prior approval from the Building Construction Review Branch.

·Approved deck plans shall not be used for supporting hot-tub installation, without re-submission for review.·All metal connections, bolts, joist hangers, etc. shall be galvanized or corrosive resistant.·All lumber shall be pressure treated Southern Pine, grade #2 or better.·Building permit is not required if all portions of the top of the deck's flooring is within 16.5 inches from the finished grade unless it carries structural load, e.g. hot-tub. All decks require zoning permit.·Setback and Permit Standards for At-Grade Structures

Provisions in the Prince William County Zoning Ordinance for at-grade decks and patios differ from those

in the Building Code. In the Zoning Ordinance, the standards are as follows: "Patios, decks, walkways, steps and driveways constructed no higher than eight (8) inches above existing grade of the contour of the land where located may encroach within any setback provided that no permanent above-grade affixed

structures such as railing, planters, benches, roofs or other appurtenances are installed."·Column spacing and joist spans shown are maximum. Smaller decks may be constructed utilizing the same structural members.

·The typical residential deck design shall be strictly adhered to. All deviations from these drawings shall

require an independent set of design documents to be prepared and submitted to the Construction Plans Review Branch for review.

·If a proposed deck does not conform to these typical design details, a custom design can be submitted to

the Building Construction Review Branch. Submit two (2) copies of the design, including framing plans, cross sections, and stringer details for review.·Material requirements are as follows:

·Please go to www.treatedwood.com/products/preserve/ for a list of hardware manufacturers that recommend hardware for use with Alkaline Copper Quaternary (ACQ) treated wood.·Decking composed of foreign lumber, plastic or manufactured materials may be substituted only when the

product has an approved evaluation report from ICC-ES or from an accredited testing laboratory.

Component

Nails, screws, lag screws, and bolts shall be

Hardware (joist hangers, anchors, clips and angles) shall be

Flashing shall be

Requirement

hot-dipped zinc galvanized, stainless steel, or

approved for use with ACQ, CA, or CA-B

·hot-dipped galvanized with a 1.85 oz/sf of zinc (G-185 coating) or·Stainless Steel (type 304 or better)·Examples"Zmax" from Simpson Strong-Tie"Triple Zinc" from USP

copper, stainless steel, silicon, bronze, or UV-resistant plastic , and hot-dipped galvanized steel with a G30 zinc coating

GENERAL NOTES

Notes: In all cases, electroplated galvanizing is NOT acceptable. ICC Evaluation Report and testing data are required to substantiate decay resistance of plastic.

1

1

2

1

2

Page 3: Prince William County - homeinspectionsva.comhomeinspectionsva.com/pdf/PWC_Deck_details.pdf · PRINCE WILLIAM COUNTY, VIRGINIA TYPICAL RESIDENTIAL DECK DESIGN SHEET 3 OF 17 G P T

PRINCE WILLIAM COUNTY, VIRGINIA TYPICAL RESIDENTIAL DECK DESIGNSHEET 3 OF 17

GP

TP

TP

TP

GP

GP

GP

GP

Jo

ist:

2x8 @ 16" OC

Typ

ica

l

(2)-2x10 Beam

:F

igure 16, sheet 11

Typ

ica

l

TP

Treated Post 6x6

Guard

rail Post 4x4 (treated)

Exte

rio

r wa

ll

of house

Guardra

il Post Connection:

Figure 10, sheet 9

6x6 Post:

Figure 7, sheet 8

Typ

ica

l

Ledger Connection:

Figure 11 or 12, sheet 10

AND F

igure 14, sheet 11

Ch

imney or

Bay W

indow

:

Figure 6, sheet 8

Inte

rmed

iate Land

ing:

Figure 19 and 20, sheet 13

Handra

il:

Figure 22,

sheet 14

Rim Jo

ist:

Figure 15, sheet 11

Typ

ica

l

4x4 Ra

il Post

Deck

ing:

Tab

le 1

sheet 8

5' Max.

2' Max.

2' Max.

8' Max.

8' Max.

5' Max.

Spacing 10' Max. 4' Min.

Sta

irway:

Figure 17,

sheet 12

Ground Land

ing:

Figure 20, sheet 13

Doub

le Jo

ist

Attachment:

Figure 13, Sheet 10

Doub

le Jo

ist:

(2)-2x8

Typ

ica

l

FIGURE

1: DECK

FRAM

ING

PLAN

Exte

rior house cond

ition sha

ll not conta

in any of

the fo

llow

ing: pre

fabricated floor

jois

t

system

(w

ithout at

least 11 4"

solid band board

), brick venee

r, stone

or cu

ltured stone

on

the wa

ll, or canti

lever.

(refer to shee

t 5 fo

r free stand

ing dec

k)

Page 4: Prince William County - homeinspectionsva.comhomeinspectionsva.com/pdf/PWC_Deck_details.pdf · PRINCE WILLIAM COUNTY, VIRGINIA TYPICAL RESIDENTIAL DECK DESIGN SHEET 3 OF 17 G P T

PRINCE WILLIAM COUNTY, VIRGINIA TYPICAL RESIDENTIAL DECK DESIGNSHEET 4 OF 17

(refer to sheet 6 for free standing deck)

FIGURE 2A: CROSS SECTION OF DECK CONNECTED TO HOUSE

(refer to sheet 6 for free standing deck)

FIGURE 2B: CROSS SECTION OF DECK CONNECTED TO HOUSE

5'-0" OC Max.

36" M

in.

11' Max.

2' Max.

24" M

in.

12' max.

2x2 Min. Pickets shall

be attached to side rails

by one of the following methods:

A. (1)-#8 screw top and bottom

B. (2)-8d spiral nails top and bottom

(2)-2x10 Beam:Figure 16, sheet 11

Openings shall not allow the passage of a 4" diameter

sphere

6x6 Post

Footing:Figure 9, sheet 9

Side Rail

2x4 Min.

Top Rail2x4 Min. or

5

4 board

finished

grade

rim joist

Ledger Connection:

Figure 11 or 12, sheet 10

AND Figure 14, sheet 11

GP

TP

4x4 post shall NOT

be notched

finished

grade

Joist-To-Beam:

Figure 8, sheet 8

Post-To-Beam:

Figure 7, sheet 8

Stairway Requirements:Figure 17, sheet 12

Stringer Detail:Figure 18, sheet 12

Stairway Connection:

Figure 21, sheet 14

Ledger Connection:

Figure 11 or 12, sheet 10

AND Figure 14, sheet 11

Guardrail Post

Connection:

Figure 10, sheet 9

Intermediate Landing:Figure 19 and 20, sheet 13

Page 5: Prince William County - homeinspectionsva.comhomeinspectionsva.com/pdf/PWC_Deck_details.pdf · PRINCE WILLIAM COUNTY, VIRGINIA TYPICAL RESIDENTIAL DECK DESIGN SHEET 3 OF 17 G P T

PRINCE WILLIAM COUNTY, VIRGINIA TYPICAL RESIDENTIAL DECK DESIGNSHEET 5 OF 17

GP

TP

TP

TP

GP

GP

GP

GP

Jo

ist:

2x8 @ 16" OC

Typ

ica

l

(2)-

2x10 Beam

:F

igure 16

, sheet 11

Typ

ica

l

TP

Treated Post 6x6

Guard

rail Post 4x4 (t

reated)

Guardra

il Post Connection:

Figure 10

, sheet 9

6x6 Post:

Figure 7

, sheet 8

Typ

ica

l

Rim Jo

ist:

Figure 15

, sheet 11

Typ

ica

l

4x4 Ra

il Post

2' Max.

2' Max.

8' Max.

8' Max.

2' Max.

5' Max.

8' Max. 4' Min.

5' Max.

Deck

ing:

Tab

le 1

sheet 8

Handra

il:

Figure 22

, sheet 14

Sta

irway:

Figure 17

, sheet 12

Inte

rmed

iate Land

ing:

Figure 19 and 20

, sheet 13

Ground Land

ing:

Figure 20

, sheet 13

(2)-

2x10 Beam

:F

igure 16

, sheet 11

Typ

ica

l

FIGURE

3: FREE

STAND

ING

DECK

FRAM

ING

PLAN

Deck sha

ll be free stand

ing when adjacent house cond

ition conta

ins any of

the fo

llow

ing: pre

fabricated

floor

jois

t system

(w

ithout at

least 11 4"

solid band board

), brick venee

r, stone

or cu

ltured stone

on the

wa

ll, or canti

lever.

Requ

ired Bridg

ing

at each guard

rail

post

Page 6: Prince William County - homeinspectionsva.comhomeinspectionsva.com/pdf/PWC_Deck_details.pdf · PRINCE WILLIAM COUNTY, VIRGINIA TYPICAL RESIDENTIAL DECK DESIGN SHEET 3 OF 17 G P T

PRINCE WILLIAM COUNTY, VIRGINIA TYPICAL RESIDENTIAL DECK DESIGNSHEET 6 OF 17

FIGURE 4A: CROSS SECTION OF FREE STANDING DECK

FIGURE 4B: CROSS SECTION OF FREE STANDING DECK

Deck shall not be anchored to face of house

Deck shall not be anchored to face of house

6x6 Post

Footing:Figure 9, sheet 9

finished

grade

rim joist

GP

TP

2x2 Min. Pickets shall be

attached to rails by one of the following methods:

A. (1)-#8 screw top and bottom

B. (2)-8d spiral nails top and bottom

Side Rail

2x4 Min.4x4 post shall NOT

be notched

(2)-2x10 Beam:Figure 16, sheet 11

Openings shall not allow the passage of a 4" diameter

sphere

5'-0" OC Max.

36" M

in.

14' Max. w/bracing

6' Max. w/o bracing

2' Max.

24" M

in.

8' Max. 2' Max.

Brac

ing:

Figure 5, sheet 7

Top Rail 2x6 or 5

4 board

finished

grade

Joist-To-Beam:

Figure 8, sheet 8

Post-To-Beam:

Figure 7, sheet 8

Stringer Detail:

Figure 18, sheet 12

Stairway Connection:

Figure 21, sheet 14

Guardrail Post

Connection:

Figure 10, sheet 9

Stairway Requirements:

Figure 17, sheet 12

Intermediate Landing:

Figure 19 and 20, sheet 13

Page 7: Prince William County - homeinspectionsva.comhomeinspectionsva.com/pdf/PWC_Deck_details.pdf · PRINCE WILLIAM COUNTY, VIRGINIA TYPICAL RESIDENTIAL DECK DESIGN SHEET 3 OF 17 G P T

PRINCE WILLIAM COUNTY, VIRGINIA TYPICAL RESIDENTIAL DECK DESIGNSHEET 7 OF 17

FIGURE 5A: LATERAL SUPPORT OF FREE STANDING DECK

Deck bracing shall be provided when deck height is greater than 8'-0" above grade.

FIGURE 5B: LATERAL SUPPORT FOR ALL DECKS

Knee bracing shall be provided when deck height is greater than 8'-0" above grade.

Free standing decks shall be braced with 2x6 diagonal bracing corner to corner at the underside of floor joists

using an 8d nail at each joist, or by installing 2x6 decking diagonally.

Joist (2)-2x10 BeamRim Joist 4x4 Rail Post

2x6 Diagonal Bracing

(or 2x4 minimum for bracing parallel to beam)

6x6 PostDecking

Beam

use 2x8

blocking when

joist and post

do not allign

(1)-1

2" dia.

thru-bolt with

washers,

Typical

Bracing Parallel to Beam Bracing Perpandicular to Beam

when joist

and post are

alligned

2x4,

Typical

2'

2' 2'

2'

14

' Max.

finished grade

Beam

(when required)Required bridging

at each guardrail

post

Page 8: Prince William County - homeinspectionsva.comhomeinspectionsva.com/pdf/PWC_Deck_details.pdf · PRINCE WILLIAM COUNTY, VIRGINIA TYPICAL RESIDENTIAL DECK DESIGN SHEET 3 OF 17 G P T

FIGURE 6: FRAMING PLAN AT CHIMNEY OR BAY WINDOW

Exterior house condition shall not contain any of the following: prefabricated floor joist system (without at least 11

4" solid band board), brick veneer, stone or cultured stone on the wall, or cantilever.(refer to sheet 5 for free standing deck)

PRINCE WILLIAM COUNTY, VIRGINIA TYPICAL RESIDENTIAL DECK DESIGNSHEET 8 OF 17

FIGURE 7: POST-TO-BEAM CONNECTION

FIGURE 8: JOIST-TO-BEAM CONNECTIONS

Chimney orBay Window

6' Max.

2" Min.

Decking

Ledger Board

Deck Jo

ists

Double Joists and

Double Headers

Joist hangers requiredat intersections

3' Max.

TABLE 1: DECKING

Joist

Spacing

Thickness of

Diagonal Decking

Composite Material2x 5

4x

16" OC YES YES NO

12" OC YES YES YES

Treated Southern Yellow Pine #2 or better Trex or similar, must be rated to support

40 PSF or 200 pound concentrated load

1

2" diameter

thru-bolt and

washers,

Typical

notch post to match beam

(2)-2x10Beam

6x6 Post

OPTION 1

(3)-8d toe nailed(2 on one side,1 on the other)

hurricane tie

or similar

joist hanger

OPTION 2 OPTION 3

top of joist and beam must be at

the same level

(2)-2x10 beam

1

2

1

Page 9: Prince William County - homeinspectionsva.comhomeinspectionsva.com/pdf/PWC_Deck_details.pdf · PRINCE WILLIAM COUNTY, VIRGINIA TYPICAL RESIDENTIAL DECK DESIGN SHEET 3 OF 17 G P T

·All footings shall bear on solid ground; bearing conditions shall be verified in the field by an approved Third Party Inspector or by County Inspectors prior to placement of concrete. The bottom of all footings closer than

5'-0" to the exterior wall of the existing house must be extended down to undisturbed soil.·Pre-manufactured post anchors shall be galvanized with 1.85 oz/sf of zinc (G-185 coating) or shall be stainless steel.

·All concrete must be properly mixed per specifications.

FIGURE 9: FOOTING DETAILS

PRINCE WILLIAM COUNTY, VIRGINIA TYPICAL RESIDENTIAL DECK DESIGNSHEET 9 OF 17

FIGURE 10: GUARDRAIL POST CONNECTION DETAIL

frost

depth

undisturbed

soil

24" M

in.

finished

grade

18" square OR20" dia. round

8" M

in.

pre-manufactured

cast-in-place post anchor

8" M

in.

8" M

in.

post anchor

post anchor

provide seal to prevent

seapage of water

Option 1 Option 2 Option 3

guardrail post

1

2" dia.

thru-bolt

and washers,

Typical

2x8 blocking

End nail w/10d nails top and bottom, each side

(if hold-down is not used)

outside

joist

hold-down anchor

(optional) w/1

2" dia.

thru-bolts and

washers

outside joist

guard post

1

2" dia.

thru-bolt and

washers,

Typical

rim joist

hold-down anchor

(optional) w/1

2" dia.

thru-bolts and

washers

joist

joist

rim joisthold-down

anchor

(optional)

hold-down

anchor

(optional)

rim joist

joist

Guardrail Post to Outside Joist Guardrail Post to Rim Joist

SECTION PLAN SECTION

PLAN

(at joist)

PLAN

(between joists)

attach per rim joist details

(if hold-down is not used)

Page 10: Prince William County - homeinspectionsva.comhomeinspectionsva.com/pdf/PWC_Deck_details.pdf · PRINCE WILLIAM COUNTY, VIRGINIA TYPICAL RESIDENTIAL DECK DESIGN SHEET 3 OF 17 G P T

FIGURE 11: LEDGER BOARD CONNECTION TO DIMENSIONAL BAND BOARD

FIGURE 12: LEDGER BOARD CONNECTION TO FOUNDATION WALL

PRINCE WILLIAM COUNTY, VIRGINIA TYPICAL RESIDENTIAL DECK DESIGNSHEET 10 OF 17

FIGURE 13: DOUBLE JOIST ATTACHMENT

TO LEDGER BOARD

Decking

Flashing

1. Flashing is requred at any ledger board

connection to a wall or floor assembly of frame construction.

2. Flashing shall be corrosion resistant.

3. Install flashing per manufacturer's recommendations.

2x8 Deck Joist @ 16" OC,

Typical

2x8 ledger board shall be

pressure treated No. 2 Southern Pine or better

1

2" diameter bolts and washers, OR 1

2"

diameter lag screws where the tip of the lag screws shall fully extend beyond the inside face of the band joist.

Floor Joist

Foundation

Wall

Existing band boardminimum 11

4" width

Exterior wood framed

house wall

Flashing to protect

ledger board

Decking

2x8 Deck Joist @ 16" OC,

Typical

If concrete wall, use 1

2" diameter expansion anchors, embeded 3" into wall.

If hollow masonry wall, use 1

2" diameter epoxy anchors or equal, embedded 3

1

2" into wall.

2x8 Ledger board shall be

pressure treated No. 2 Southern Pine or better

Foundation

Wall

Floor Joist

Existing band boardminimum 11

4" width

When using lag screws, gap between ledger

board and face of house band joist shall not exceed 1

2".

Gap between ledger board and face of

house band joist shall not exceed 1

2". (2)-1

2" dia. lag screws, bolts, or anchors

6" Max.

Double joists

hanger

Ledger board

Page 11: Prince William County - homeinspectionsva.comhomeinspectionsva.com/pdf/PWC_Deck_details.pdf · PRINCE WILLIAM COUNTY, VIRGINIA TYPICAL RESIDENTIAL DECK DESIGN SHEET 3 OF 17 G P T

FIGURE 14: FASTENER SPACING AND CLEARANCES AT LEDGER BOARD

PRINCE WILLIAM COUNTY, VIRGINIA TYPICAL RESIDENTIAL DECK DESIGNSHEET 11 OF 17

FIGURE 16: BUILT-UP BEAM DETAIL

FIGURE 15: RIM JOIST ATTACHMENT DETAIL

lag screws, bolts, or anchors, with washer,

Typical

(2)-1

2" lag screws, bolts, or anchors with washers at each end

2"

2"

2"

S/2 S

TABLE 2: FASTENER SPACING (S) FOR A RESIDENTIAL SOUTHERN PINE DECK LEDGER AND A 2-INCH NOMINAL SOLID-SAWN BAND JOIST [50 PSF TOTAL LOAD]

Joist Span (ft) 6' and less 6'-1" to 8' 8'-1" to 10' 10'-1" to 12'

On-Center Spacing of Fasteners

1

2"x4" Lag Screw 30 23 18 15

1

2" Bolt with

washers36 36 34 29

The maximum gap between the face of the ledger board and face of the house band joist shall be 1

2".

The tip of the lag screw shall be fully extended beyond the inside face of the band joist. Ledgers shall be flashed to prevent water from contacting the house band joist.

Lag screws and bolts shall be staggered as shown.

Deck ledger shall be 2x8 No. 2 Southern Pine (minimum), or other approved method and material as established by standard engineering practice.

S

10d nails or #10 wood screws, staggered in 2 rows

2 nails or

screws,

each end16"

Typical

Provide additional lag screws, bolts, or anchors with washers on each side of exterior terminations

that penetrate the band board

such as dryer vent caps and fresh air intakes.

rim joist

attach rim joist to end of

each joist with (5)-#10x3" Min. wood screws

joists

Exterior penetration (typical)

a

b

c

d

e

a,b

c

d,e

Page 12: Prince William County - homeinspectionsva.comhomeinspectionsva.com/pdf/PWC_Deck_details.pdf · PRINCE WILLIAM COUNTY, VIRGINIA TYPICAL RESIDENTIAL DECK DESIGN SHEET 3 OF 17 G P T

FIGURE 17: STAIRWAY REQUIREMENTS

PRINCE WILLIAM COUNTY, VIRGINIA TYPICAL RESIDENTIAL DECK DESIGNSHEET 12 OF 17

FIGURE 18: TREAD, RISER, AND STRINGER DETAIL

3

4"-11

4" nosing which shall not deviate from one

another by more than 3

8"

riser heights shall not deviate from one another

by more than 3

8"

treads:

2x material

risers:

1x material, Min.

risers may be open, but shall not allow

the passage of a 4" diameter sphere

grade

2x12 stair

stringer

4x4 post

1

2" diameter

thru-bolt and

washers,

Typical

stair

guardrail height measured

from

nosing of step

stringer: cut 2x12

triangular opening shall not permit the passage of a

6" dia. sphere

handrail shall return

to post at each end

handra

il he

ight:

34"-38"

from

nos

ing of step

frost depth

10"x10"x8" thick

stair footing

24"

34" M

in.

5'-0" Max. OC

guardrail spacing

81

4" Max.

9" Min.

5" Min.

11' Max. spancut stringer

3 stringers Min.

Opening shall not permit the

passage of a 43

8"

diameter sphere

tread depths shall not deviate from one another

by more than 3

8"

4x4 post

31.5" Min.

2x12 stringer @ 24" OC Max.

81

4" Max.

9" Min.

stringer: solid 2x12

tread ledger:2x4 attached to

stringer on each side

with (4)-10d nails or (4)-#8 wood screws

16' Max. spansolid stringer

risers may be open, but shall not allow the

passage of a 4" diameter sphere

36" Min.

Page 13: Prince William County - homeinspectionsva.comhomeinspectionsva.com/pdf/PWC_Deck_details.pdf · PRINCE WILLIAM COUNTY, VIRGINIA TYPICAL RESIDENTIAL DECK DESIGN SHEET 3 OF 17 G P T

FIGURE 19: INTERMEDIATE STAIRWAY LANDING FRAMING DETAILS

FIGURE 20: STAIRWAY LANDING DIMENSION DETAILS

PRINCE WILLIAM COUNTY, VIRGINIA TYPICAL RESIDENTIAL DECK DESIGNSHEET 13 OF 17

Dimensions shown are for both intermediate, and ground level landings.

stairway

36" Min.

width of stairwayMin.

stairwaylanding

direction of travel

upper stairway: connected to deck

(Figure 21, sheet 14)guardrail

post

landing outside

joist

1

2" diameter

thru-bolt

and washers,

Typical

landingdecking

Framing Plan

upper stringer

lower stringer:

bears on ground

landing

2x8 joist @

16" OC, Max.

rim joist

guardrail

post

double

joist

cut stringer to bear

on double rim joist

and landing decking,

secure to post with 1

2"

dia. thru-bolt and

washers

joist secured

with joist hanger

down

down

lower

stringer

Framing Cross Section

landing

decking

lower

stairway

upper stairway guardrail

post

1

2" dia. thru-

bolt and washers,

Typical

landing

joist

Framing Cross Section

rim joist and outside

joist secured with

(2)-1

2" dia. thru-bolts

and washers,

Typical

Page 14: Prince William County - homeinspectionsva.comhomeinspectionsva.com/pdf/PWC_Deck_details.pdf · PRINCE WILLIAM COUNTY, VIRGINIA TYPICAL RESIDENTIAL DECK DESIGN SHEET 3 OF 17 G P T

FIGURE 21: STAIRWAY CONNECTION TO DECK DETAILS

FIGURE 22: HANDRAIL DETAILS

PRINCE WILLIAM COUNTY, VIRGINIA TYPICAL RESIDENTIAL DECK DESIGNSHEET 14 OF 17

Handrails should be continuous from top riser to bottom riser.

4x4 guardrail

post

rim joist or

outside joist

stringer

(2)-1

2" diameter

thru-bolts and

washers each way,

Typical

sloped joist hanger

stringer

rim joist or

outside joist

Option 1: Stringer Connection with Thru-Bolts Option 2: Stringer Connection with Joist Hanger

riser heights shall not deviate from one another

by more than 3

8"

tread depths shall not deviate from one another

by more than 3

8"

9" Min.

81

4" Max.

Type I, Option 1For circular

handrails only

1 1

4"-2" outside

diameter

Type I, Option 2Non-circular handrails must

have a perimeter of 4" min. and 61

4" max. with a

maximum cross-section

dimension of 21

4"

Guardrail

Post

1 1

2"x11

2" spacerat 24" OC, Max.

handrail with

perimeter of 4"-61

4"

1 1

2"x11

2" spacerat 24" OC, Max.

handrail with

perimeter greater than 61

4"

Type II, Option 1

Handrails with a perimeter

greater than 61

4" shall provide a graspable finger recess area on both sides of the profile

finger recess detail

(2)-8d nails,Typical

Side Rail

Corrosion-resistant

handrail bracket

4'-0" OC Max.

1 1

2" Min.

3

4" Max.

7

8" Max.

3

8" Min.

1 34" Min.

5

16" Min.

1 1

4" Min. - 23

4" Max.

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DO NOT DO'S

PRINCE WILLIAM COUNTY, VIRGINIA TYPICAL RESIDENTIAL DECK DESIGNSHEET 15 OF 17

Prohibited Post-to-Beam Connection

Prohibited Ledger Attachment:to open web trusses

Prohibited Ledger Attachment:to or thru brick veneer

Prohibited Ledger Attachment:to house overhang

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PRINCE WILLIAM COUNTY, VIRGINIA TYPICAL RESIDENTIAL DECK DESIGNSHEET 16 OF 17

FIGURE 23: CLEARANCE FROM MECHANICAL AND ELECTRICAL INSTALLATION

·Contact the gas company for a courtesy inspection if: the distance from finished grade to bottom of joist is

less than 5'-0", a roof will be above the deck, or the deck will have a floor covering.·Normally the power company will not approve a meter location on or under a balcony, porch, carport, deck catwalk, or stairs. Contact power company for more information.·Gas fireplace terminations shall be 18" from the top of the outside termination to combustible materials and overhangs or per manufacturer's specifications.

Gas Meter

deck joist

Air Conditioning

condensing unit

finished grade

5'-0" or permanufacturer's

instruction

Meter

4'-0" M

in. 6

'-0" Max.

6" Min.

30"

Min.

42" M

in.

Front View Top View

6'-3"

from floor or ground OR

3'-0" ove

r equ

ip. Wh

ichever

is h

igher

Clear/Unobstructed space around meter

STAIRWAY ILLUMINATION FOR DECKS

The International Residential code (IRC) establishes the requirements for stairway illumination. This section includes stairways associated with decks. The following are a few of the ways to comply with the stairway

illumination requirements:

·Install an exterior light fixture within 5 feet of horizontal distance from the top landing of the stairway.

The light fixture must be positioned to illuminate both the top landing and the stairway.·Install an exterior 150 watt flood light fixture within 30 feet of horizontal distance from the top landing

of the stairway. The light fixture must be positioned to illuminate both the top landing and the stairway.·Install low voltage light fixtures that are approved for exterior use. A low voltage fixture must be installed at each step. Also, one fixture must be installed on the walkway within 3 feet of the bottom

step. Any wiring must be installed and secured in a safe manner. The low voltage lights may be

plugged into an exterior GFI electrical outlet with an In-Use Weatherproof Cover (NEMA 3R Rated) or hard wired into the electrical panel box in the house.·Other methods of complying with the illumination requirements, including justification and analysis shall be

submitted to the Building Construction Review Branch for approval prior to installation.

An electrical permit and inspection is required for the installation of the required illumination of the stairway. During the final inspection of the deck, the inspector will verify that the required stairway illumination has been

provided.

GLAZING ADJACENT TO STAIRWAYS

Glazing installed within 60 inches of the bottom of the stairways where the bottom edge is less than 60 inches above the walking surface shall be considered a hazardous location per the current edition of the IRC

and shall meet the safety glazing standards outlined in the IRC.

M

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PRINCE WILLIAM COUNTY, VIRGINIA TYPICAL RESIDENTIAL DECK DESIGNSHEET 17 OF 17

REQUIRED INSPECTION AND SCHEDULING

1.Before you dig, call Miss Utility at 811 or 1-800-552-7001.2.Call for a footing inspection (102) before placing concrete.3.Call for a final inspection (151) when the deck is complete.4.If required, call for electrical permit and inspection (199).

·To schedule inspections, go online to www.pwcgov.org/eInspections or call the Automated Phone System at 703-792-6970.·No inspections shall be made unless an approved set of drawings are on site.

Important Phone Numbers ·Residential Plan Review

703-792-6939

·Building Construction Review703-792-6930

·Building Construction Services (Permitting)703-792-6924

·To Schedule Inspection call703-792-6970 or visit

www.pwcgov.org/eInspections·Inspection Office

(703)792-7006·Zoning Office

(703)792-6830

Hours

The Building Development Division reviews deck plans M-F from 8:00am To 11:00am.

Please arrive by 10:30 a.m. to have your plan reviewed that day.