Prescriptive Residential Wood Deck Construction Guide

Welcome to your Prescriptive Residential Wood Deck Construction Guide

DCA-6: What is the minimum nominal thickness of corrosion-resistant metal flashing required?

0.015-inch

0.019-inch

0.022-inch

0.025-inch

DCA-6: What is the maximum allowable joist span for 2x10 southern pine at 16" o.c.?

14' - 0"

16' - 2"

11' - 5"

13' - 1"

DCA-6: What is the minimum post size for a wood deck according to the guide?

4x4 nominal

6x6 nominal

8x8 nominal

10x10 nominal

DCA-6: What type of nails is required for decking material?

2-8d common nails

2-8d threaded nails

2-10d common nails

2-10d threaded nails

DCA-6: What is the minimum grade of lumber required for deck construction?

No. 1

No. 2

No. 3

No. 4

DCA-6: How far can a beam extend past a post face?

LB/2

LB/3

LB/4

LB/5

DCA-6: What is the minimum end and edge distance for a ½" diameter bolt in ledger connections?

2 inches

2.5 inches

3 inches

3.5 inches

DCA-6: What is the maximum deck width compared to its length?

Equal to the deck length

Half the deck length

Twice the deck length

No limitation as long as structural integrity is maintained

DCA-6: What is the minimum lumber size for a ledger board?

2x6 nominal

2x8 nominal

2x10 nominal

2x12 nominal

DCA-6: What is the maximum cantilever length of a joist?

L/2

L/3

L/4

L/6

DCA-6: What is the minimum required size for wood screws used in deck construction?

#6

#8

#10

#12

DCA-6: What is the minimum required corrosion resistance for fasteners used with preservative-treated wood?

ASTM A 153, Class D

ASTM A 153, Class C

ASTM B 695, Class 55

ASTM F 1667

DCA-6: What is the maximum post height for a deck according to Table 4 of the guide?

Determined by the post size and load

8 feet

10 feet

14 feet

DCA-6: What is the minimum required bearing length for joists on a beam?

1 inch

1.5 inches

3 inches

No specific requirement, as long as it is structurally sound

DCA-6: What type of wood should not be in direct contact with aluminum?

Treated with ACQ

Treated with Copper Azole

Treated with ACZA

All of the above

DCA-6: What is the minimum required thickness for decking material?

1" nominal

1.5" nominal

2" nominal

2.5" nominal

DCA-6: What is the maximum allowable spacing between deck boards?

1/16 inch

1/8 inch

1/4 inch

3/8 inch

DCA-6: What is the minimum required edge distance for lag screws in ledger connections?

1 inch

1.5 inch

2 inches

2.5 inches

DCA-6: What is the minimum required size for a deck joist?

2x4 nominal

2x6 nominal

2x8 nominal

2x10 nominal

DCA-6: What is the minimum required size for a deck beam composed of two 2x members?

2x4 nominal

2x6 nominal

2x8 nominal

2x10 nominal

DCA-6: What is the minimum required size for a deck beam composed of three 2x members?

2x6 nominal

2x8 nominal

2x10 nominal

2x12 nominal

DCA-6: What is the minimum required size for a deck beam composed of four 2x members?

2x6 nominal

2x8 nominal

2x10 nominal

2x12 nominal

DCA-6: What is the maximum allowable span for a 2x6 southern pine deck joist at 16" o.c.?

9' - 0"

9' - 11"

10' - 0"

10' - 6"

DCA-6: What is the maximum allowable span for a 2x8 southern pine deck joist at 24" o.c.?

9' - 8"

10' - 0"

10' - 6"

11' - 0"

DCA-6: What is the maximum allowable span for a 2x10 southern pine deck joist at 12" o.c.?

14' - 0"

15' - 0"

16' - 0"

16' - 2"

DCA-6: What is the maximum allowable span for a 2x12 southern pine deck joist at 16" o.c.?

13' - 6"

14' - 0"

14' - 6"

15' - 0"

DCA-6: What is the maximum allowable span for a 2x6 Douglas Fir-Larch deck joist at 24" o.c.?

7' - 7"

8' - 0"

8' - 6"

9' - 0"

DCA-6: What is the maximum allowable span for a 2x8 Hem-Fir deck joist at 16" o.c.?

11' - 10"

12' - 0"

12' - 6"

13' - 0"

DCA-6: What is the maximum allowable span for a 2x10 Spruce-Pine-Fir deck joist at 12" o.c.?

15' - 8"

16' - 0"

16' - 2"

16' - 6"

DCA-6: What is the maximum allowable span for a 2x12 Redwood deck joist at 24" o.c.?

12' - 10"

13' - 0"

13' - 6"

14' - 0"

DCA-6: What is the maximum allowable span for a 2x6 Western Cedars deck joist at 16" o.c.?

9' - 1"

9' - 6"

9' - 11"

10' - 0"

DCA-6: What is the maximum allowable span for a 2x8 Ponderosa Pine deck joist at 12" o.c.?

11' - 8"

12' - 0"

12' - 6"

DCA-6: What is the maximum allowable span for a 2x10 Red Pine deck joist at 24" o.c.?

10' - 7"

11' - 0"

11' - 1"

11' - 5"

DCA-6: What is the maximum allowable span for a 2x12 Southern Pine deck joist at 16" o.c.?

13' - 6"

14' - 0"

14' - 6"

15' - 0"

DCA-6: What is the maximum allowable span for a 2-2x6 Southern Pine deck beam supporting a single span of joists with overhangs?

6' - 8"

7' - 4"

8' - 6"

9' - 0"

DCA-6: What is the maximum allowable span for a 2-2x8 Douglas Fir-Larch deck beam supporting a single span of joists with overhangs?

10' - 1"

10' - 7"

11' - 1"

11' - 11"

DCA-6: What is the maximum allowable span for a 2-2x10 Hem-Fir deck beam supporting a single span of joists with overhangs?

12' - 9"

13' - 0"

13' - 7"

14' - 0"

DCA-6: What is the maximum allowable span for a 2-2x12 Spruce-Pine-Fir deck beam supporting a single span of joists with overhangs?

15' - 0"

15' - 8"

16' - 0"

16' - 2"

DCA-6: What is the maximum allowable span for a 3-2x6 Redwood deck beam supporting a single span of joists with overhangs?

11' - 11"

12' - 0"

12' - 6"

13' - 0"

DCA-6: What is the maximum allowable span for a 3-2x8 Western Cedars deck beam supporting a single span of joists with overhangs?

7' - 11"

8' - 2"

8' - 6"

9' - 5"