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Decks
are thought of as places for us to enjoy—to entertain or relax.
But before we can really relax on our decks, we need to know that they
are safe.
According to experts, the deck is the most dangerous place in the house.
More injuries and more deaths occur on decks than anywhere else, and of
all structural failures other than those caused by hurricanes and tornadoes,
collapsing decks cause the most damage. Between 2000 and 2006, there were
30 fatalities in the United States alone.
If you already have a deck, it’s probably in need of an
annual “deck check.”
The North American Deck and Railing Association recommends that you check
different areas of the deck for splitting or decay. This is especially
important on the ledger board, where the deck meets the house. Poke the
wood with a sharp screwdriver or an ice pick. If you can easily penetrate
the wood to a quarter or half inch, or it you break off wood without splinters,
there may be decay. If so, the wood should be replaced.
Check for small holes in the wood. Those may be signs of insect damage
and you might need to call a professional exterminator.
Put pressure on your railings and banisters to make sure they are secure.
Then check all fastening hardware such as screws, nails, and anchors for
loose items that need to be tightened.
Here is some important information if you are planning on building your
own deck.
It’s estimated that this year 2,500,000 decks will be built in the
US. Many of these will be built by homeowners themselves, people who may
not be aware of the importance of correct building requirements for long-term
deck safety.
Part of the problem is that the U.S. national building codes offer little
coverage on residential decks and local building codes vary greatly. It’s
important to check with your local government agency that issues building
permits before starting on your deck.
Remember that most deck failures occur at the place where the deck joins
the house. Make sure you use quality fasteners of more than sufficient
strength and durability. Treated lumber contains copper that can corrode
steel fasteners, so check the corrosion-resistance of the kind you select.
A good source of information can be found at http://
www.strongtie.com
Plan on putting an additional support under the deck next to the house.
This can act as a fail-safe in case the deck were to fail and can prevent
serious injury.
If you are building your deck with wood, you might want to consult the
International Residential Code for building materials. It offers tables
that recommend what size boards to use. For example, the IRC suggests
that if you use pine wood for floor joists, you need to use 2” x
10” boards, spaced 24” on center to span 13’. It also
gives guidance for railings: 36” minimum height with posts no greater
than 6’ apart and attached with 2.5” diameter thru bolts and
washers.
If you are planning on using composite materials such as the popular Trex@,
there is a web site that gives strength specifications on a variety of
manufacturer’s products. http://www.icces.org/reports/index.cfm?csi_num=06610&view_details=yes.
The wonderful feeling of recreation and repose that a deck can provide
shouldn’t be compromised by concerns for safety. Taking the time
and expense to ensure that your deck is a safe place for you and your
family pays dividends in years of peace of mind.
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