• Structural beams, lintels, rafters, bearers and joists in residential and light commercial buildings.
  • PL8 for general structural applications.
  • PL12 where higher loads, longer spans or a reduced member depth are required.
• Suitable for design within NZS 3604, and for Specific Engineering Design to NZS 3603 and AS/NZS 1170 where outside NZS 3604 scope.
• Treatment selected to suit application: H1.2 for interior dry conditions, H3.2 for exterior above ground including exposed and coastal applications, H5 where in-ground or in-contact use is required.
• Suitable for use in high wind and seismic zones where sized accordingly. Also suitable for corrosive chemical environments, including swimming pool structures and salt water exposure, where timber is not subject to the corrosion affecting steel elements.
• Dimensional stability with minimal twisting, warping, splitting or shrinkage compared with solid sawn timber.
• Non Visual precambered as standard to offset deflection.
• PL12 stiffness properties reduce deflection at equivalent span and loading, and allow shallower sections where ceiling height, head height or sightlines are constrained.
• H3.2 treated beams are machined after treatment, removing the green surface colouring associated with H3.2 and producing a light brown finish.

PL8 and PL12 are not interchangeable. PL12 is manufactured from SG12 timber and delivers higher strength, stiffness and bracing units. Substituting PL8 for PL12, or a generic GL product for either, will not deliver the specified structural performance and voids compliance. PL is the Prolam prefix and GL is the generic glulam prefix; where PL is specified, no substitution should take place.

Members must be sized using the Prolam Specifier, Prolam span tables, or by an engineer using Prolam published structural properties.

No drilling, notching or rebating unless specifically detailed by the design engineer or via the Prolam Specifier. Where permitted, holes must be small, drilled in the middle third of the span, centred vertically, and never at beam ends or at support or fixing locations. Unapproved holes and notches void compliance.

Timber must be protected from the elements until sealed. All exposed structural timber must be sealed with a quality paint or stain system within 14 days of delivery, and all cuts, holes and rebates resealed.

Fixings must be selected for the corrosion environment in accordance with NZS 3604 Section 4.

Visual grade selection is required where the beam is exposed.

Not suitable for permanently saturated conditions unless specified with appropriate treatment.

Prolam structural laminated timber, installed in accordance with Prolam installation requirements, will meet or contribute to meeting the following provisions of the NZ Building Code.

• B1 Structure: 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). AS/NZS 1170:2002 for engineering span tables. Manufactured to AS/NZS 1328.1:1998 and AS 5068.
• B2 Durability: meets the requirements of B2.3.1 (a), B2.3.2. All timber is treated in accordance with NZS 3640. Prolam treats its own timber and is third party audited for compliance with the New Zealand treatment standard.
• C Protection from Fire: meets the requirements of C6.3, C6.4. APA Evaluation of Char Rate (ASTM E119), TT-118, January 2015.
• F2 Hazardous Building Materials: meets the requirements of F2.3.1. All timber is treated in accordance with NZS 3640, including the required flash-off period before dispatch. Prolam treats its own timber and is third party audited for compliance with the New Zealand treatment standard. Safety Data Sheets for treatment chemicals are available on request.

PS1 Producer Statements available via the Prolam Specifier for applications within its scope.

• Dimensional stability with minimal twisting, warping, splitting or shrinkage compared with solid sawn timber. Non Visual precambered as standard to offset deflection. PL12 stiffness properties reduce deflection at equivalent span and loading, and allow shallower sections where ceiling height, head height or sightlines are constrained. H3.2 treated beams are machined after treatment, removing the green surface colouring associated with H3.2 and producing a light brown finish.
• Timber sourced from renewable and sustainably managed New Zealand plantations. FSC certified options available.
• Product-specific Environmental Product Declaration available.