Exposed Truss

Love the look of exposed timber trusses?

Prolam Exposed Timber Trusses are a stand-out solution for creating open and spacious interiors and alfresco areas. Designed to be seen, exposed trusses combine the beauty and strength of timber with the structural integrity and dimensional stability of our engineered glulam solutions. 

Made from select quality New Zealand plantation-grown radiata pine, Prolam Exposed Timber Trusses are manufactured inhouse offering you optimal design freedom and flexibility. 

Choose from our range of 20 standard truss designs or work with us to custom design and manufacture trusses to match your exact project requirements. Industrial chic, modern rustic or minimalist elegance – our trusses are available in a variety of grades and finishes to enable you to achieve the look and feel you want.

Plus, our streamlined process from design to supply makes integrating exposed timber trusses into residential and commercial building designs simple, straightforward and fast. 

Download Exposed Truss Brochure

Obtain a quote and order now
VISIT to start the Exposed Truss design and order process.

GO TO Design Request page and input truss details via prompts on the online form. 

UPLOAD Your building plans as requested and AGREE To the design estimate so we can get to work. If our engineer requires further information or clarification, you will be notified by email.

Once completed, you’ll receive an email confirmation that your design is ready. PAY and DOWNLOAD your design and PS1 certification.

PLACE A PURCHASE ORDER through your local timber merchant for your beams and plates to be manufactured to your design specifications.

The beams, plates and bolts are DELIVERED as a kit to your local merchant or frame and truss plant for cutting and assembling. 

A cut above
• Premium visual grade structural timber
• Flexibility to match your design aesthetic
• Available in a range of sizes and lengths
• Variety of finishes – machine, band sawn, sanded & sealed, pre-primed
• H1.2 and H3.2 Treatments available for interior and exterior use
• Easy to specify with PS1 certification
• Expert advice from in-house structural engineers
• Conveniently supplied through local timber merchant
• Truss beams, plates and bolts packaged as a kitset 
• High dimensional stability (no twisting or warping)
• Made in New Zealand
FSC certified timber options available

Have technical questions?
Our sales team and in-house structural engineers are on-hand to support you to find the right solution for your project.
Contact us today

Prolam structural laminated timber beams can be used in any form of construction where the structure relies on AS/NZS 1170: 2002 and NZ 3603 1993. The design can be from the Prolam online software, span tables or specific design by an engineer using Prolam’s structural properties. All structural timber products must be stored, handled and installed in accordance with all Prolam’s installation requirements. Prolam structural laminated timber works well in harsh environments, for example in corrosive chemical stores, fell-monger, acid plants, salt-water environments and swimming pools, as it does not rust and the glues used are service class 3 certified.


Limitations on use

This laminated treated product must be protected from the elements until it is sealed. Prolam structural timber can be supplied with a temporary sealer if required. Timber naturally absorbs moisture from the surrounding environment that 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 absorption of moisture.

Prolam structural timber products can be used in specific fire performance situations, and must be designed in conjunction with a fire engineer.

Building code statement of compliance 

Prolam structural laminated timber installed in accordance with the Prolam installation requirements, 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. And can be used in service class 3 situations provided H3.2 treatment or higher is used. 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. Correct treatments must be used in the right places.
  • 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 following 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.

NZBC designed to comply



Protection from Fire

Hazardous Building Materials

Features & Benefits

Cost Effectiveness

High weight-to-strength ratio of Prolam allows for maximum loads over large spans with the smallest possible end sections.

Product Quality

Prolam manufactured in accordance with AS/NZS 1328 Glue Laminated Structural Timber standard.

Fire Safety

Extensive fire test data shows that Prolam beams maintain structural load support for measurable periods of time in fire situations.

Renewable Resource

Made from renewable New Zealand plantation timber, Prolam uses 14 times less energy to produce compared to the equivalent steel beam.

Chemical Resistance

Prolam works well in harsh environments as it does not rust and the glues used are service class 3 certified.