When it comes to constructing a building, the choice of floor joists plays a crucial role in determining its structural integrity and overall functionality. There are three distinct types of wooden floor joists, each with its unique advantages. In this guide, we’ll break down the main differences between these three types of floor joists and discuss their installation requirements, helping you make an informed decision for your construction project.
Traditional solid timber floor joists are exactly as the name suggests – they consist of solid pieces of timber. While you can easily source these from your local builders’ merchants, it’s essential to note that the timber supplied is typically of C24 or C16 grade, which is a slightly lower grade than what we use at Minera Roof Trusses. Here are some key points to consider:
Timber I-joists are engineered wood products designed with top and bottom timber flanges and a specialised strand board (OSB) in the middle, forming an ‘I’ shape when viewed from the side. In the UK, two main suppliers of timber I-joists are James Jones JJI Joists and Steico.
If a customer chooses to opt for an I joist approach to their floor or roof then they must ensure that the designers know where the pipework is to be positioned before commencing design. The necessity for pipework to be predetermined in some cases can be complex which is where an open metal web joist solution comes into its own.
The extra design considerations needed prior to manufacture do mean that they can potentially provide a more economical solution to open metal web joists but lack where metal web joists allow more freedom during installation and service fit-out.
James Jones JJI joists are stocked in various depths, from 220 to 450mm, with 4 width options (47mm, 63mm, 72mm and 97mm). These all come in 10, 12 or 14 metre stock lengths which can be cut down before being delivered to suit your needs on site.
Steico’s I-joists have top and bottom flanges made from laminated veneer lumber (LVL).The process of softwood being bonded together results in greater strengths for extreme load bearing capabilities.
Open metal web joists, also known as posi joists or easi joists, supplied by Minera Roof Trusses, offer a unique set of benefits, catering to the modern demands of construction. Here’s what sets them apart from the alternatives:
In summary, open metal web joists provide a sustainable, efficient, and versatile solution for modern construction projects. Their ability to span large areas, accommodate custom requirements, and offer excellent fire resistance makes them a valuable choice for architects, engineers, and builders looking to optimise structural integrity and environmental impact. Consider your project’s specific needs and choose the floor joists that best align with your goals for a successful construction venture.
If you’re looking to start your next project and require high-quality, sustainable floor joists, get in touch today for a free, no-obligation quote.