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Current residential deck code

steveray said:
Bumping this.....Anyone requiring frost protection or at least a footing/slab/concrete landing at the bottom of deck stairs?
Click to expand...

Requiring the slab at the base of the stairs but no frost protection below it, if that's the Q.

Will also allow paver's.
 
We (CT) have amended the FP section:

(Amd) R403.1.4.1 Frost protection. Except where otherwise protected from frost, foundation
walls, piers and other permanent supports of buildings and structures shall be protected from frost
by one or more of the following methods:
1. Extended below the frost line specified in Table R301.2.(1).
2. Constructed in accordance with Section R403.3.
3. Constructed in accordance with ASCE 32.
4. Erected on solid rock.
Exceptions:
1. Protection of freestanding accessory structures with an area of 600 square feet (56 m2) or
less, of light-frame construction, with an eave height of 10 feet (3048 mm) or less shall not
be required.
2. Protection of freestanding accessory structures with an area of 400 square feet (37 m2) or
less, of other than light-frame construction, with an eave height of 10 feet (3048 mm) or
less shall not be required.
3. Decks not supported by a dwelling need not be provided with footings that extend below
the frost line.
4. The footing for the grade level termination of stairs or ramps attached to decks or landings,
whether the deck or landing is supported by a dwelling or not, shall only be required to be
placed at least 12 inches (305 mm) below the undisturbed ground surface in accordance
with R403.1.4.
Footings shall not bear on frozen soil unless the frozen condition is permanent.

Which is just some really weird language IMO....
 
f. Cantilevered spans not exceeding the nominal depth of the joist are permitted.

I have always used the balcony cantilever chart, but now that we have the specific deck joist chart, can we not allow any cantilevers greater than the depth of the joist for decks?
 
steveray said:
f. Cantilevered spans not exceeding the nominal depth of the joist are permitted.

I have always used the balcony cantilever chart, but now that we have the specific deck joist chart, can we not allow any cantilevers greater than the depth of the joist for decks?
Click to expand...
R507.5 - ... Deck joists shall be permitted to cantilever not greater than one-forth of the actual adjacent span.
 
Code provisions that conflict....Say it ain't so....

Update: there was errata here (that I just found) and I guess what it is trying to say is that you can use the joist spacing for no cantilever for a cantilever up to the depth of the joist. More than that you use the other table (up to the 1/4)
 
Last edited:
Robert said:
How many of you are seeing Deck2Wall spacers? They eliminate flashing & hold the ledger off the building by 5/8" for air circulation. Any issues with these other then the penetrations needing to be caulked?
Click to expand...
You mean not everyone uses old hockey pucks?
 
steveray said:
Bumping this.....Anyone requiring frost protection or at least a footing/slab/concrete landing at the bottom of deck stairs? I know it is in DCA 6 and could make it into code, I am just having a hard time with it as I have never seen it cause an issue....
Click to expand...
We have never required it here and I have not heard of any issues.
 
IRC 2015, R507.5 Adjacent span...So a 14-ft FJ span ÷ 4 = 3.5-ft.

We have a maximum cantilever of 3-ft as a general rule, looks like I'll have to look at this again.

Is there no blocking between the cantilever required anymore?
 
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