Mounting Deck Ledgers to Engineered Floor Systems - Fine Homebuilding
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Mounting Deck Ledgers to Engineered Floor Systems

comments (3) March 29th, 2012 in Blogs
MikeGuertin Mike Guertin, editorial advisor

The AWC DCA6 Prescriptive Residential Wood Deck Construction Guide ledger fastener table.
The AWC DCA6 Prescriptive Residential Wood Deck Construction Guide ledger fastener table.Click To Enlarge

The AWC DCA6 Prescriptive Residential Wood Deck Construction Guide ledger fastener table.

Photo: American Wood Council

 

The 2012 IRC ledger attachment schedule only works on house rim joists made of solid-sawn lumber or Douglas fir laminated veneer lumber (LVL).  You can't follow it when mounting deck ledgers to rim joists made of engineered wood products (EWP) such as parallel strand lumber (PSL) laminated strand lumber (LSL) or LVL.  Instead we have to look to resources provided by fastener manufacturers, engineered wood manufacturers and industry associations to ensure these connections are made safely.

Engineered I-joist floor systems complicate deck ledger attachment because there is such a variety of rim materials out there on houses. The first of many challenges in mounting a ledger to an engineered floor system is determining what the rim board material is. Is it solid rim board or just an I-joist? If it's solid rim board, what is the material and how thick is it? Many of the I-joist systems in the 1980s and 1990s relied on ¾-in. plywood or OSB rips, none of which are solid enough to support a deck ledger. When I encounter these, I opt for a free-standing deck.

Engineered rim boards come in different thicknesses and densities, so they perform differently and you'll need to identify exactly what exists and then look for attachment solutions. My first step is to find a manufacturer mark on the rim joist material and then consult the manufacturer's installation guide.  Many now have prescriptive deck ledger installation details. But often those details only apply to newer engineered wood products and aren't applicable for out of production products.  In those cases, I contact the manufacturer directly for guidance.

The American Wood Council's DCA6 "Prescriptive Residential Wood Deck Construction Guide" has a table similar to the IRC ledger fastener table and it includes lag screw and bolt schedules for common 1 in. and 1 1/8 in. EWP rim joist materials.  Many building officials will accept the AWC DCA6 details for deck construction.

Products such as Attach-A-Deck and some structural screw makers have tested their products for use with EWP so you can follow their fastening schedules.

 

Also, read the other articles in the dificult-deck-ledger series:

Freestanding Decks Solve Ledger Attachment Challenges

Mounting Deck Ledgers to Floor Trusses

 


posted in: Blogs, deck, deck ledger, DCA6

Comments (3)

larsonbrent larsonbrent writes: Find out what things you need to consider when you are shopping for the best laptop hard drive for your computer
Posted: 11:21 pm on May 11th

larsonbrent larsonbrent writes: Things to consider when shopping for the best hard disk drives
If you are shopping for the best laptop hard drive, you're going to have your work cut out for you, especially buy laptop hard drive online. Finding a reliable hard drive to purchase is not going to be as easy as 123. You may have to spend some time looking around on the Internet and doing some comparison shopping so that you can find a hard disk for sale that will satisfy your expectations and meet your needs as well, before you make a determine you can just know about the laptop hard drive cost in the field. Using a laptop means that you're going to need enough space to store your files, install your software and do everything that you want to do on the computer. There a lot of things to consider when you purchase a new hard drive for your laptop. Below, you will find with some of these things are and why it's important to shop around for hard disk drives for sale so that you can find the precise laptop hard drive that you want to buy.

1,Look for a hard disk drive that has enough space to meet your needs
Knowing how much space you need on your hard drive can be a difficult thing. Often times, people don't think they need much space but then they come to realize that they needed more than they originally thought. For instance, some people think that they just need to purchase a hard drive that is going to cover their files. For instance, if they have about 10 gigabytes of files, they may purchase just a 20 to 40 gigabyte hard drive. The problem with this is that you are not accounting for the operating system. If you plan to run an operating system like Linux or Windows on the computer, then you need to purchase a hard drive that has enough space to properly run the operating system and store your files. There are other things to keep in mind as well, for instance, what software are you going to be putting on the computer? Software can take up a lot of space on a computer, especially games and software that is very complex. These types of software titles can get up into several gigabytes of space, so you need to have a big enough hard drive to accommodate for these applications.

2,Remember that it's okay to go over what you need but it's not okay to go under
Of course, you can easily see there are so many laptop hard drive for sale online, when purchasing a hard drive, it's okay to purchase more gigabytes than you actually need, just like me, I love installing lots of games, so I bought a big sony laptop hard drive in advance. However, if you were to purchase less gigabytes than you actually need, this is not going to be okay because you won't be able to do the things that you want to do on your computer. Be sure to shoot for more disk space. Keep in mind that installing a hard drive on a laptop can be more complicated than installing a hard drive on a desktop computer. You also need to accommodate for the installation costs when you're going to have a company install this for you. Look online and do some comparison shopping so that you can find the best laptop hard drive for a price that makes sense for your budget.

Need more info about laptop hard drives or purchasing, please go harddrivestore.org

Thank you, useful.
Thank you, useful
But to be frank, it doesn't tell in detail what should we do to choose a best one, agree?
I don't think it's good to buy a new hard dirve, why not change the laptop? Lol.
Posted: 11:21 pm on May 11th

larsonbrent larsonbrent writes: Find out what to look for when you are shopping for a hard drive
Posted: 11:30 pm on May 9th

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