This puts your architect, building designer or engineer in the best position to make performance decisions right at the beginning of your project.
This application will allow you to look up a suitable Dindas I-Joist product based on your Single Span project requirements. As EWP designers, we understand that our customers and builders have their preferences when it comes to permanent Dead Load Deflection. To help you decide on the best product for your job, we have also included the option to select from a predefined maximum deflection list.
Single Span – Span distance is the INTERNAL measurement between structural supports
Single Span Floor Joist
Class 1 buildings are houses. Typically they are standalone single dwellings of a domestic or residential nature. They can also be horizontally attached to other Class 1 buildings, such as terrace houses, rowhouses, or townhouses. In these situations, they must be separated by a wall with fire-resisting and sound insulation properties.
The Class 1 classification includes two sub-classifications: Class 1a and Class 1b
Max. Centres are the maximum centres that this joist can be installed at. If a joist’s “Max. Centres” is 600mm, the joist can be used at the lower nominated spacings ie; 300mm, 400mm, 480mm, and 600mm centres. If it’s Max. Joist Centres are 300mm, and they can only be used at any joist centres equal to or less than 300mm centres.
Flooring thickness must be checked before installation to ensure it can span the intended Max. Centre spacings.
* Joists with a Max.Centre spacing of 450mm or less = 19mm min
* Joists with a Max.Centre spacing of 600mm or less = 22mm min
It is assumed that the Min. bearing conditions (35mm) or greater have been included in the design. This can be a solid bottom edge bearing (like a wall) or face fixed metal hanger.
These calculation results are only to be used as a handy guide (not for construction) when designing your project joist spans. Final design confirmation and for further design options, including continuous spans or non-uniformly loaded joists, please refer to the Dindas Design Guide or reach out to us at any of our state locations or request information through dindas.com.au.
They are an interactive lookup tool for selecting DindasJoist products based on single-span project requirements and stated design assumptions.
The tool is useful for builders, designers, estimators and project teams checking early-stage DindasJoist options for class 1 building applications.
The tool helps guide product selection. Final joist selection is then confirmed against the project requirements, drawings and relevant design documentation.
Span, joist spacing, load assumptions, flooring thickness, bearing length and deflection preference all affect selection.
Yes, but only when you use the DindasJoist span-table pathway that matches the intended application. Floor and roof applications can have different load assumptions, spacing and design requirements.
The key items to check are hole size, spacing and location requirements in the Dindas I-joist installation guide and relevant technical bulletins on the DindasJoist product page before cutting, drilling or making service penetrations.
Project-specific design support is available through Dindas technical support enquiries, Dindas Design Centre or the relevant project designer or engineer.