About Joist Supports
Click Here for USA Adjustable Joist Support
What is the KlevaKlip Adjustable Joist Support AJ45KIT, AJH45G and AJH50G (Aus/NZ)?
AUSTRALIAN PATENT 2012261552 - United States 14/098253
The Adjustable Joist Support has been designed specifically to enable decks to easily be built over concrete slabs in areas where limited ground clearance is available. It is ideal for use when the step-down from your door to your concrete slab is between 100mm (minimum) and around 230mm (maximum).
The AJ45KIT & AJH45G has been specifically designed to be used with 45mm wide treated pine timber joists and the AJH50G for 50mm wide Steel or Hardwood joists for the Australian & New Zealand markets.
For exact heights please see our "Minimum and Maximum Top of Joists Height information" or "Heights achieved" grid (both listed below) using 60mm,100mm & 120mm M10 bolts and 70,90, & 140 x 45mm Timber joists for the AJ45KIT, AJH45G and using 60mm & 120mm M10 bolts for 100 & 150mm x 50mm Steel or Hardwood joists.
Watch our Adjustable Joist Support (Aus/NZ)Install Video
Download Graph "How to achieve joist heights using KlevaKlip Substructure Products"
How to achieve Min & Max Top/Bottom of Joist heights PDF
360° view AJH45G Adjustable Joist Support Assembled
360° view AJH50G Adjustable Joist Support Assembled
Adjustable Joist Support in Action
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Click to enlarge
How is the Product Purchased?
There are now three options available when purchasing the Adjustable Joist Support- either the Adjustable Joist Kit which includes Bolts, Nuts, Washers and dynabolts or the Adjustable Joist Support AJH45G or AJH50G where they are not included.
Option 1: Adjustable Joist "Kit" (AJ45KIT):
The product comes in boxes containing 16 joist supports,16 base plates, 32 x 100mm M10 hex bolts,64 x M10 hex nuts, 32 x M10 washers and 16 x 12 mm Dynabolts.
Option 2: Standard Adjustable Joist Support (AJH45G):
The product comes in boxes containing 24 joist supports and 24 base plates.(see photo below) Bolts, nuts, washers etc.are purchased separately from your hardware store/merchant depending on what height you want to achieve.
Each Adjustable Joist Support ( joist holder + base plate) requires 2 x M10 Hex Head Bolts, 4 x M10 Nuts & 2 X M10 washers, 1 x 12mm x 50mm Galvanised 12mm dynabolt or x 10mm x 60mm masonry bolt or similar.
Option 3: Standard Adjustable Joist Support (AJH50G):
The product comes in boxes containing 24 joist supports and 24 base plates.(see photo below) Bolts, nuts, washers etc.are purchased separately from your hardware store/merchant depending on what height you want to achieve.
Each Adjustable Joist Support ( joist holder + base plate) requires 2 x M10 Hex Head Bolts, 4 x M10 Nuts & 2 X M10 washers, 1 x 12mm x 50mm Galvanised 12mm dynabolt or x 10mm x 60mm masonry bolt or similar.
Differences between Adjustable Joist "Kit" (AJ45KIT)verses Standard Adjustable Joist Support (AJH45G)?
Advantages
- Easy sourcing – box contains everything you need to build your structure
- Fully threaded 100mm length bolts provide maximum adjustability to cope with your required height and any irregularities in your concrete
- Easy for the retailer – no special ordering or calculating of bolts etc, and no problems regarding thread length of stocked bolts
Disadvantages
- All Kit bolts supplied are 100 mm length – sometimes customers require 120mm length bolts. They should purchase AJH45G and purchase the bolts,nuts etc separately.
- For top of joist height below 106mm, customers may need to cut off the portion of the bolt protruding above the joist (relevant for 70mm joists)
AJ45KIT- How Packaged in box AJH45G/AJH50G- How Packaged in box
16 Base Plates & Joist Supports 24 Base Plates & Joist Supports
Includes: Bolts, Nuts,Washers & dynabolts Excludes: Bolts, Nuts,Washers & dynabolts or masonry bolts
Advantages of the Adjustable Joist Support
- Keeps your joists off the concrete and free of unwanted moisture ingress. This Prevents Joist-Rot Through The Bottom Of Your Joists.
- Is Ideal For Use On Area Where The Concrete Has Built In "Fall" - To Provide A Level Deck.
- Quick and easy to use - purpose-built for the application
- Gives a neat, professional look across your deck structure without resorting to various different packers and brackets to achieve your end result
- Uses standard M10 10mm hex head bolts, Nuts,Washers and 12 mm dynabolts or 10 mm masonry bolts either supplied in AJKIT or purchased separately from your Hardware Store/Merchant if you are using the AJH45G or AJH50G.
Minimum and Maximum Top of Joist Information
Minimum top of joist heights
76 mm – fixing joist bracket direct to concrete no base-plate no bolts and using 70mm joist
86 mm – using Joist Support KIT- lowest height achievable using base-plate, 100mm fully treaded bolts and joist bracket with 70mm joist
86 mm – using Adjustable Joist Support AJH45G- lowest height achievable using base-plate, 60mm bolts and joist bracket with 70mm joist
106 mm – using Joist Support KIT- lowest height achievable using base-plate, 100mm fully threaded bolts and joist bracket with 90mm joist
106 mm – using Adjustable Joist Support AJH45G - lowest height achievable using base-plate, 60mm bolts and joist bracket with 90mm joist
116 mm – using Adjustable Joist Support AJH50G - lowest height achievable using base-plate, 60mm bolts and joist bracket with 100mm joist
Maximum top of joist heights
150 mm – using Joist Support KIT,100mm bolts & 90mm joist
170 mm – using Adjustable Joist Support AJH45G, 120mm bolts & 90mm joist
180 mm – using Adjustable Joist Support AJH50G, 120mm bolts & 100mm joist
180 mm – using Joist Support KIT, 100mm bolts & 120mm joist
200 mm – using Adjustable Joist Support AJH45G, 120mm bolts & 120mm joist
230 mm – using Adjustable Joist Support AJH50G, 120mm bolts & 150mm joist
200 mm – using Joist Support KIT, 100mm bolts & 140mm joist
220 mm – using Adjustable Joist Support AJH45G, 120mm bolts & 140mm joist
230 mm – using Adjustable Joist Support AJH50G, 120mm bolts & 150mm joist
Note – the above information is a “practical” rather than an “absolute” document. There will be a number of ways to achieve the heights mentioned with different sized joists, however the installer should always be mindful to operate within the KlevaKlip product parameters and relevant joist span tables
"Heights achieved" when using 100mm for AJ45KIT, 60mm & 120mm long M10 Hex Head Bolts for AJH45G and AJH50G Adjustable Joist Supports (Aus/NZ)?
Note: All measurements for 60mm &120mm are based on using Galvanised Zenith brand M10 hex head long-threaded bolts.
| Adjustable Joist Type | Hex Head Bolt Length | Min Height to Bottom of Joist | Max Height to Bottom of Joist | Min Height to Top of 70/90 x 45mm Timber Joist | Min Height to Top of 100/150 x 50mm Steel or Hardwood Joist | Max Height to Top of 70/90/140 x 45mm Timber Joist | Max Height to Top of 100/150x 50mm Steel or Hardwood Joist |
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Adjustable Joist "Kit" (AJ45KIT)
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100mm | 16mm | 60mm | 86* / 106mm | 130 / 150 / 200mm | ||
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Standard Adjustable Joist (AJH45G)
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60mm | 16mm | 20mm | 86 / 106mm | 90 /110/160mm | ||
| 120mm | 18mm | 80mm | 88* / 108mm | 150 /170/ 220mm | |||
| **No Bolt | 6mm | 76 / 96mm | |||||
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Adjustable Joist Support (AJH50G) |
60mm | 16mm | 20mm | 116/166mm | 120/170mm | ||
| 120mm | 18mm | 80mm | 118/168mm | 180/230mm | |||
| **No Bolt | 6mm | 106/156mm |
* 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.
Span requirements for base- plate positioning for AJ45KIT, AJH45G & AJH50G (Aus/NZ)
All based upon "continuous span" with joists at 450mm between centre's.
| Adjustable Joist Type | Joist Size | Recommended Span (mm) | Maximum Span (mm) |
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Adjustable Joist "KIT" (AJ45KIT) Standard Adjustable Joist Support (AJH45G) |
70 x 45 MGP10 | 800 | 1200 |
| 90 x 45 MGP10 | 1000 | 1500 | |
| 90 x 45 MGP12 | 1200 | 1600 | |
| *120x45MGP10 | 1200 | 1800 | |
| *140x45MGP10 | 1200 | 1800 | |
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Adjustable Joist Support (AJH50G) |
*100x50 Steel or Hardwood Joist |
1200 | 1800 |
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* 150x50 Steel or Hardwood Joist |
1200 | 1800 |
* Joist span limited by lateral loading on bolts
How to achieve Min & Max Top/Bottom of Joist heights PDF
