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Product range
Masonite Beams’ I-joist standard range consists of structurally glued joist, studs and soleplates. The flanges for joists and studs consist of mechanically sorted structural timber, and the web consists of 10 mm particle board of P5 quality, which is a moisture-resistant construction board or 10 mm OSB/3. For more information see Masonite Beams ETA.
Product range
Below you will find our standard product range of Masonite Beams. If you require other lengths or additional information, please don't hesitate to reach out to us. For added convenience, we can supply pre-insulated I-joist, helping to speed up your construction process. Contact us here for more details and to discuss how we can best support your project needs.
Find our current UK stock list here!


| LIGHTWEIGHT JOISTS IN STOCK/AVAILABLE TO ORDER | kg/lm | ||
|---|---|---|---|
| HL-Beam | Length held in stock (mm) | PB | OSB |
| HL220, C24 |
|
3.00 | 2.81 |
| HL240, C24 |
|
3.10 | 2.94 |
| HL300, C24 |
|
3.60 | 3.31 |
| H-Beam | Length held in stock (mm) | PB | OSB |
| H220, C30 |
|
3.00 | 2.81 |
| H240, C30 |
|
3.10 | 2.94 |
| H300, C30 |
|
3.60 | 3.31 |
| HM-Beam | Length held in stock (mm) | PB | OSB |
| HM220, C30 |
|
3.50 | 3.36 |
| HM240, C30 |
|
3.70 | 3.49 |
| HM300, C30 |
|
4.10 | 3.86 |
| HM350, C30 |
|
4.50 | 4.17 |
| HM400, C30 |
|
4,80 | 4.48 |
| HM450, C30 |
|
n/a | 4.79 |
| HI-Beam | Length held in stock (mm) | PB | OSB |
| HI220, C30 |
|
4.00 | 3.79 |
| HI240, C30 |
|
4.10 | 3.91 |
| HI300, C30 |
|
4.50 | 4.28 |
| HI350, C30 |
|
4.90 | 4.59 |
| HI400, C30 |
|
5.30 | 4.90 |
| HB-Beam | Length held in stock (mm) | PB | OSB |
| HB200, C30 |
|
4.90 | 4.80 |
| HB220, C30 |
|
5.10 | 4.93 |
| HB240, C30 |
|
5.20 | 5.05 |
| HB300, C30 |
|
5.70 | 5.42 |
| HB350, C30 |
|
6.00 | 5.73 |
| HB400, C30 |
|
6.40 | 6.04 |
| HB450, C30 |
|
n/a | 6.35 |
| Top/Bottom Plates | Length held in stock (mm) | PB | OSB |
| S220, C18* |
|
n/a | 2.95 |
| S240, C18* |
|
n/a | 3.08 |
| S300, C18* |
|
n/a | 3.46 |
Particle board as web material
At Masonite Beams, we use particle board as the standard web material in our I-joists, as it ensures stable and reliable deliveries to our customers. For those who prefer, we also offer OSB as an alternative web material upon request, to meet specific needs and preferences.