Ideal for lintels, rafters, bearers, joists, trusses, pergolas, and verandas.

• Available in visual and non-visual grades
• Sizes range from 88mmx42mm to 595mmx180mm
• Treated in either H1.2, H3.2 or H5
• PL8 or PL12 strengths

• This laminated treated product must be protected from the elements until it is sealed, Prolam's structural timber can be supplied with a temporary sealer if required
  
  • Timber naturally absorbs moisture from the surrounding environment. This can cause the product to alter dimensionally.
  • All exposed structural timber must be sealed with a good quality paint or stain system within 14 days of delivery to dramatically reduce the incidence of dimensional change and increases longevity
  • All cuts, holes and rebates must also be sealed to prevent the ingress of moisture
• Prolam structural timber products can be used in specific fire performance situations, and must be designed in conjunction with a fire engineer
• Must be designed and installed in accordance with the Prolam guidance and technical literature
• Use in accordance with the Prolam Warranty & Maintenance information, and Prolam Timber Coating Requirements document

Prolam structural laminated timber installed in accordance with the Prolam installation requiements, will comply with the below performance clauses of the New Zealand building code:

• Structure B1/AS1: meets the requirements of B1.3.1 B1.3.2 B1.3.3 (a, b, f, j, m, q) B1.3.4 (a, b, c, d, e); AS1170:2002 for engineering span tables, AS/NZS 1328:1998 and AS5068 for building element
• Durability B2/AS1: meets the requirements of B2.3.1(a) B2.3.2. All timber is treated in accordance with NZS3640. Prolam treats it’s own timber, and is third party audited to ensure compliance to the New Zealand treatment standard.
• Protection from Fire C: APA Evaluation of Char Rate (ASTM E119), TT- 118, January 2015; meets the requirements of C6.3 C6.4. Where members are required to have a fire resistance rating the designer can use the follow standards for FRR design: TT-118 OR: NZS 3603:1993 (section 9).
• Hazardous Building Materials F2/AS1: meets the requirements of F2.3.1. Timber treatment suppliers meet NZS3640, which includes flash-off requirements.

Warranty and Maintenance:

• Prolam beams treated to H3.2 may be used in exterior situations provided that they are finished with a paint or stain coating.
• Maintaining Prolam beams requires that painted timber is be recoated every 24 months and stained timber is recoated every 12 months. Particular attention must be paid to ensuring that exposed cut ends are re-stained or re-painted
• Where a cut end is sealed with a proprietary capping, it is important to ensure that the capping is tightly sealed
• Prolam beams should always be painted with light colours or dark colours with light reflectance value (LRV) of greater than 45%. Colours with an LRV of 45% or less are not recommended, as they can absorb heat which may result in timber distortion and cracking
• Please see Coating Requirements document for more details