- Home
- Choose Your Klip
- About Klevaklip
- Deck Building Products
- Snap-Loc for Modwood® Decking
- Snap-Loc for Trex® Decking
- Merbau Clips
- KLEVAKLIP Installation Guides
- Contact us
- Online Shop
Watch our Adjustable Joist Support AJH38G (USA) Installation Video
We have not yet found a steel joist of the right thickness, so haven't tested this as yet. There doesn't appear any reason why it shouldn't work.
Yes, the joist support component is designed to be able to be used on its own in areas that warrant this. The ribs in the bottom of the joist support will still keep the joist off the concrete by approx 1/4 inch. You do of course lose the "adjustable" aspect of the product.
No, the products come as a pair in boxes and cannot be purchased separate from each other.
No, you must purchase these items separately as the height of the deck off the concrete will govern what length bolt will need to be used.
Each Adjustable Joist Support ( joist holder + base plate) requires 2 x 3/8 inch Hex Head Bolts, 4 x 3/8 inch Nuts & 2 X 3/8 inch washers, 1 x 1/2 x 2 inch long Galvanised screw anchor or similar.
Minimum 2 1/2 inch long and Maximum 5 inch long galvanized Hex Head bolts.
The product comes in boxes containing 24 joist supports and 24 base plates.click here to see photo Bolts, nuts, washers etc. are purchased separately from your hardware store/merchant depending on what height you want to achieve.
Yes, the washers are very important and form an integral part of the system.
AJH38G - 1 x 1/2 inch x 2 inch long Galvanised screw anchor or similar.
KlevaKlip Joist Supports and Base Plates have been hot dip galvanised in accordance with International Standards ISO 1461:2009 and USA Standards ASTM A123.
This has been independently tested to support a load bearing capacity of 60 PSF when used at the recommended joist spans listed below.
No, this is not recommended as the pavers do not have adequate structural stability.
We quite often find that people have miscalculated the number of adjustable joist supports required for their decking area. We believe the main cause of this is that people work out the length of their joists, and simply divide by the "support spacings" (taken from our span table) they have decided on between the supports - eg - having a 9ft 10 inch length joist with spacings of 3ft 3 inch to give 3 supports. Wrong! - This does not take into account the initial support at the start of the joist.
Therefore, the correct answer would be 4.
Similarly, when working out the number of joists required, you need to work out the number of "joists spacings" along your deck and remember to add one for the initial joist.
So, to finalise the number of supports you will need for your deck, multiply the number of joists on your deck by the number of supports to be placed along your joists. This should give you an accurate answer.
IF IN DOUBT - DRAW A SMALL DIAGRAM WITH CROSSES FOR YOUR SUPPORTS AS SHOWN BELOW AND SIMPLY COUNT THEM UP.
IN THIS EXAMPLE YOU WILL NEED 48 ADJUSTABLE JOIST SUPPORTS
See our span table below
Span requirements for base-plate positioning all based upon "continuous span" with joists at 16 inch between centre's.
All joists should be pressure treated for outdoor use.
| Joist Size | Recommended Span (feet) | Maximum Span (feet) |
| 2 x 4 inch | 3 ft 3 inch | 4 ft 11 inch |
| *2 x 6 inch | 4 ft | 6 ft |
* Joist span limited by lateral loading on bolts
|
Note: All measurements based on using Galvanised long-threaded hex head bolts. |
||||
| Hex Head Bolt Length | Min Height to Bottom of Joist | Max Height to Bottom of Joist | Min Height to Top of 4/6 inch Joist | Max Height to Top of 4/6 inch Joist |
| 2 1/2 inch | 5/8 inch | 1 inch | 4 1/4 / 6 1/4 inch | 4 1/2/ 6 1/2 inch |
| 5 inch | 3/4 inch* | 3 1/4 inch | 4 1/2*/ 6 1/2 inch | 6 1/2 / 8 1/2 inch |
| **No Bolt | 1/4 inch | 3 3/4 / 5 3/4 inch | ||
* If using long bolts at low heights, to prevent the bolts protruding past the top of joist, the end of the bolt will need to be cut off.
** When Using Joist Support Only.
