Sprucelam is an untreated engineered timber product suitable for use as a structural element where the risk of exposure to moisture is minimised. Manufactured from Picea abies, commonly referred to as Spruce, or Norwegian Spruce.
It is available with grade characteristic design values equivalent to GL12, GL10 and GL8.
Grown in Europe, and commonly used in construction, and to create durable, engineered structural wood products
Creamy white in appearance with a hint of yellow and/or red
Fine, even texture and a consistently straight grain
Durability of Spruce heartwood is equivalent to that of Douglas Fir
Techlam supplies Sprucelam for use as a structural element located within the external envelope of a building or where it forms part of the external structure subject to the same controls applied to untreated Douglas Fir.
Where used as part of the external structure the following scope applies:
In new buildings designed and construction to NZS3604:2011or specifically engineered to NZS3603:1993.
In existing buildings where the designer and installer have determined that the existing building is suitable for the intended building work and that all other conditions have been met, and
In stand alone, single units less than 10m in building height, and
In all corrosion zones, subject to fixings in accordance with section 4, NZS3604:2011
Has a risk matrix score of no more than 6 on any external face, as defined in E2/AS1, and
Has a roof slope of 10° or more, and
If it has a skillion roof, the roofing material is corrugated iron or concrete, metal of clay tiles for adequate ventilation, and
Has eaves or 450mm-wide or more for single-storey buildings and eaves 600mm-wide or more for two storey buildings
Limitations on Use
Where used as an internal structural element, the Sprucelam must be left exposed
The use of Sprucelam must be specifically engineered to NZS3603:1993
Statement of Building Code Compliance
If designed, installed and maintained in accordance with all Techlam requirements, Sprucelam will comply with or contribute to compliance with the following provisions of the NZBC:
B1 Structure, B1.3.1, B1.3.2, B1.3.3 (a, b, f, h, j, m, q) - Compliance by Alternative Solution AS/NZS1328:1998 (glulamination) NZS3603:1993A4 (timber structures), NZS3631:1998 (grading) and AS/NZS 5068:2006 (finger jointing).
B2 Durability, B2.3.1(a) - Compliance by B2/VM1 April 2017: Scion TE16-067 – Spruce & Radiata Pine Finger Joint Qualification test & Glue Bond Durability Test. March 2015: Scion Expert Opinion Durability of heartwood Spruce compared to durability of sap/heartwood Douglas fir
F2 Hazardous Building Materials, F2.3.1 — Compliance by In service history
Sprucelam products are being used across NZ and offshore in various interior structural projects. Structural laminated Spruce has been used extensively across Europe for many decades.
Other Performance Attributes
All Sprucelam products are manufactured and verified in accordance with the following New Zealand Standards: