According to AWC DCA-6, what is the minimum diameter of lag screws or bolts used to fasten a deck ledger to a band joist?
Ledger Attachment
Question · Easy
DCA-6 Table 5 specifies fastener on-center spacing based on which parameter?
For a deck with a 14-foot joist span, DCA-6 requires 1/2-inch lag screws into a 2-inch nominal band joist to be spaced no further apart than what on-center distance?
Question · Hard
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Which ledger attachment condition is NOT permitted by DCA-6 or IRC Section R507?
Question · Medium
Per IRC R507.2.4, what is the minimum nominal thickness of corrosion-resistant metal flashing used at the deck ledger?
Where must deck ledger flashing be installed in relation to the wall covering?
During inspection, you observe deck ledger lag screws spaced at 28 inches on-center for a 12-ft joist span. What is the correct finding?
DCA-6 Figure 19 requires deck ledger lag screws and bolts to be installed in what pattern?
What is required when a deck ledger is attached to a house with a band joist of unknown framing (e.g., behind a finished basement ceiling)?
Which fastener type is NOT permitted by DCA-6 to attach a deck ledger directly to a house band joist?
Per IRC R507.9.2, hold-down tension devices used for deck lateral load connection must each have an allowable stress design capacity of at least how much, when two devices are installed?
Where must IRC R507.9.2 hold-down tension devices be located on a deck?
An inspector observes a deck ledger attached to brick veneer with masonry anchors. What is the correct reporting?
What is the purpose of blocking installed between floor joists at a deck ledger attachment?
Which ledger-attachment defect is MOST likely to lead to a catastrophic deck collapse?
Per DCA-6, the minimum distance from the edge of a deck ledger to the centerline of a lag screw or bolt is approximately:
Per IRC R507.3, what determines the required size of a concrete deck footing?
Footings Posts
Per IRC R403.1.4, where the local frost line is 36 inches deep, the bottom of an exterior deck footing must be at least how far below grade?
A helical pile foundation supporting a deck post:
Which AWPA Use Category is required for a pressure-treated deck post in direct ground contact?
Per IRC R507.4, the minimum nominal size of a solid-sawn deck post supporting a beam is:
What is the correct connection between a deck post and a concrete footing or pier?
Per IRC Table R507.3, the minimum concrete footing size for a deck post supporting a tributary area of 20 sq ft on 1,500 psf soil is approximately:
Which post-to-beam connection most reliably transfers vertical load and resists uplift?
An inspector observes a 6x6 deck post notched on three sides to support a built-up 2-ply 2x10 beam. The remaining net section is approximately 2 inches by 2 inches at the notch. What is the correct finding?
When a deck is supported on a freestanding configuration (no ledger to the house), what is one allowable simplification?
A concrete deck pier protrudes only 1 inch above grade with a wood post bearing flat on top. What concern should the inspector note?
Per IRC R507.3, the minimum thickness of a concrete deck footing is:
A deck post is observed to be split vertically full height with the split passing through a lag-bolted connection. What is the correct inspection action?
Per DCA-6, the maximum unbraced height of a 6x6 PT deck post supporting a beam is approximately:
Per IRC R507.5, what is the minimum grade for solid-sawn lumber used as a deck beam or joist?
Beams Joists
Per DCA-6, a Southern Pine #2 deck joist of 2x10 lumber at 16 inches on-center can span approximately how far for a 40 psf live load?
Per DCA-6, the cantilever portion of a deck joist may not exceed what fraction of the backspan?
A deck joist is supported by a face-mount joist hanger nailed with 1-1/2-inch roofing nails. What is the correct finding?
Built-up deck beams in DCA-6 are typically constructed by:
Per DCA-6, the minimum bearing length for a deck beam on a post is:
A deck joist hung in a face-mount hanger has its top edge 3/8 inch below the top of the supporting ledger. What is the correct inspection finding?
Per IRC R507.5, a deck beam may bear on top of a deck post by being:
Why is end-grain bearing of a joist directly on a beam (without a hanger or seat cut) discouraged on residential decks?
An inspector notices noticeable mid-span deflection in a deck joist under live load. The joist is a 2x6 Southern Pine #2 spanning 12 ft at 16 in o.c. What is the most likely cause?
Why are concentrated loads (e.g., a hot tub) on a residential deck framed for 40 psf a structural concern?
Per DCA-6, what species/grade combination has the SHORTEST allowable joist spans for any given size and spacing?
When inspecting a deck with mixed composite and pressure-treated decking boards on the same joists, what is the inspector's main concern?
Decking Fastening
What is the typical minimum gap between adjacent composite or PVC deck boards installed at the joist?
Hidden fastener systems (e.g., DeckWise Ipe Clip) typically:
Why are screws generally preferred over nails for attaching deck boards to joists?
What is the correct deck-board fastening minimum (per typical manufacturers and best practice)?
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