In residential construction, achieving consistent, code-compliant set-downs in wet areas is vital – but doing so with speed and efficiency can be a challenge. That is where MiTek’s Posi-Strut system, combined with smart design thinking, creates a significant advantage.
By varying both the metal web sizes and the timber chord sizes within a floor structure, fabricators and designers can gain more control over set-down depths and optimise the floor system to suit specific project needs. It’s a flexible, practical solution that supports the growing demand for performance and speed on site.
Built-in set-downs. Built for compliance.
MiTek’s floor systems can be custom designed with built-in set-downs to help you meet NCC requirements for no-step wet areas – without any extra work. There is no need for rework or modification on site. Just install and move on.
This capability is especially useful in bathrooms, laundries and showers, where a smooth transition and effective water drainage are essential. By factoring in set-downs from the beginning, the system arrives on site ready to go – saving time, improving quality and delivering compliance with ease.
The benefit of mixing Posi-Strut sizes with variable chord sizes
MiTek offers a range of Posi-Strut sizes, and when combined with different chord depths, opens up further possibilities to fine-tune set-downs across a floor. Designers can incorporate longer webs in some areas and shorter webs in others to manipulate step sizes and floor heights with precision.
One of the most effective ways to deliver step-downs in a Posi-Strut Floor system is by changing the top or bottom chord size. A deeper top chord outside the step area, for example, can allow for a greater drop in the floor profile – making it ideal for showers and bathrooms where water runoff or compliance with accessibility standards is required.
This approach ensures better structural continuity with no need for additional blocking or adjustment on site. The result is a more streamlined build process, improved performance and better alignment between design intent and the final result.
The flexibility is particularly useful in multi-bathroom homes or split-level designs, where multiple set-down requirements may need to be accommodated without over-complicating fabrication or installation.
Design with Intent for a better outcome
By leveraging MiTek’s Design – Make – Build methodology, fabricators and builders can lock in smarter set-down solutions from the earliest stages of the project. That means designing variable floor heights with intent – not as an afterthought. The benefits flow through to manufacturing, where the use of consistent, pre-agreed component sizes and variations supports an efficient, repeatable process.
In the build stage, the result is a floor system that fits the project perfectly, minimises on-site modification and accelerates installation – all while delivering on performance and compliance.
Built-in flexibility, built-in confidence
MiTek’s Posi-Strut system and software tools are designed to support smarter, more adaptable designs that meet the evolving needs of the industry. With variable set-downs and the ability to mix Posi-Strut and timber chord sizes, fabricators and builders can design with confidence, make with precision and build with greater speed and reliability.
For help with incorporating variable set-downs into your next project, speak to your local MiTek representative or contact our technical team.