Design Centre – FAQ’s

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  • Frequently Asked Questions - Design
How will you design my project?

Your Dindas EWP designer will first carefully review the information you have provided for the project. Your individual project requirements will determine the way we look at setting out your design. If minimal information is supplied we will design to the applicable Australian Standards.

TIP: For the most economical and performance guaranteed design solution, the more information the better.

What information do you require?

Great question and we are glad you asked!
The minimum requirements for submitting a design request to your local Dindas Australia office are;

  1. Quality architectural plans. These must include the following and can be supplied as (PDF, DWG, DXF) document types;
    • Clear and concise dimensions across the entire drawing set
    • Site plan
    • Floor plan(s) – all floors to be separate if multi-storey
    • Bracing plans – including nominated Wind Speed
    • Elevations – all
    • Cross-sections – minimum (2) and must include;
      • Roof pitch
      • Eaves Overhang
      • Overall wall heights
      • Exterior building materials
      • Interior building materials
    • Construction details
    • Project details – Usually found in the title block
      • Builders Trading Name
      • Physical delivery address (Site Address)
      • Architects business details
      • Date and revision # of plans
  2. Engineering plans.
    • When you submit your plans and include engineering drawings you also need to advise us if you would like us to follow these as drawn OR work with your engineer to provide an alternative design option.
    • If you do not advise a preference, we will follow your submitted engineering drawings
    • NOTE: If engineers plans are provided after the initial first design estimate and before the order is placed we will have to review and provide a revision for the design which may affect the original design cost.
  3. Steel Supporting Members.
    • Should your project engineering plans include steel you will need to advise us to;
      • Follow as per engineering size and construction details
      • Consider conversion to a timber member where possible
  4. Design Criteria – Deflection.
    • As per AS1684 – This criteria varies depending on the element being designed.
    • Performance enhanced alternative – preferred deflection limits lower than that of the AS1684. You will need to clearly specify
  5. Floor Step-downs
    • If you require a recess or step-down to any part of your floor system, you will need to provide clearly defined areas on the plans including step down dimensions. Refer to the Technical Library for standard step-down options.
  6. Member Spacings.
    • Please advise if you have a preference for your floor joist spacings. If it is not clear on the architectural or engineering plans and no preference provided we will design at the most economical spacings. This may include-480mm or 600mm which will change the Min. flooring thickness to 22mm.
  7. Ancillary Items.
    • We have a large range of quality ancillary items which we can include in the full Dindas Framing Solution. Please indicate when submitting your project details what you would like us to include. If you are unsure, simply advise us to ‘Include all ancillaries’ and we will include everything you need for your project.
  8. Special Design Considerations.
    • If your project includes: Outdoor Spas, BAL (fire) rating, specific cladding or flooring products and or, any unusual loads.
Can you show me how to read your Site Layouts?
Site Layout Explainer Video and Sample PDF
Site Layout Explainer Video and Sample PDF PDF
I have a 'WS' symbol next to the hanger label. What does this mean?

WS – or ‘Web Stiffeners’ are required for that particular connection. From time to time, you will see this appear and it is critical that they are installed according to the web stiffener installation guidelines and details provided on your Dindas Framing Plan. Typical areas where you will see Web Stiffener requirements are:

  • Under a heavy load or point load at the end of the joist
  • At the end of a joist where the face-mount hanger does NOT match the same height of the I-Joist
    • The web stiffeners help provide lateral restraint for the shorter hanger
  • At the end of the joist in full depth face-mount hanger where uplift restraint is required
    • In this connection, nailing into the Supporting AND Supported members are required
  • Under a perpendicular load-bearing wall from above
  • For birdsmouth cuts on rafter joists
Are your designs certified?

All project or single-member designs that are completed by a Dindas EWP Designer are completed through various certified timber design software programs. Depending on your State and Territory regulations, we have the applicable certification reporting requirements.

The design certificates and corresponding details are ONLY available for projects that have been ordered and supplied (in full) as per the terms and conditions.
As always, our designs are not a substitute for your full engineers project details but, are to read in conjunction with.

Do you have Design Terms and Conditions?

We certainly do.
These are made available on the front page of every estimate and must be read and accepted prior to placing your order.

What is the maximum hole I can 'neatly' cut into your LVL?

We are glad you asked before drilling / cutting your hole.
Holes through LVL are covered in the EWP Section of the AS1684.2.2010 (Fig:4.1). Our LVL manufacturers have reviewed and accepted these details.
Please download our handy one-page guide (as per As1684.2.2010) here

TIP: To ensure you can locate and drill the hole you require, we would always encourage you to reach out to your local Dindas Design office for a design check. This way we can be sure that all the design considerations are confirmed.

With the pending new NCC rules I have to now include recessed floor areas. Can you accommodate these into your floor designs?

Great question,
Utilising our ‘state of the art’ DDS software, our EWP designers have been providing stepdown or recessed areas for a number of years now. Depending on your requirements we either provide a standard stepdown in height using the I-Joist depths (300mm to 240mm) or we can provide alternate custom solutions that will better fit your design*

Check out the Technical Resources page – 3D Connection Library – Typical Building Details for examples

* for confirmed ordered projects only

I am using Rimboard on my project. Do I need to always join the standard lengths on the end of my joists?

Dindas Performance Rated Rim Board is a specially designed component, designed to work with your floor framing members to deliver a complete engineered wood solution. With high strength, dimensional stability, and structural reliability, Rim Boards perfectly match the depth of our structural RFPI I-joists and offer highly predictable performance and consistent quality. Dindas Performance Rated Rim Board may is manufactured out of 17mm structural plywood and is available in 2.4m lengths.

During installation, your Rim board length may on occasion finish within the joist spacing. Not to worry! Simply refer to our splicing detail – Detail 1B4 which can be found in the Technical Resource Library here