Exposed Truss

Love the look of exposed truss?
Prolam Exposed Timber Trusses are a stand-out solution for creating open and spacious interiors and alfresco areas. Designed to be seen, Prolam 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 custom designed and manufactured to offer optimal design freedom and flexibility and a superior fit. Industrial chic, modern rustic or minimalist elegance – trusses are available in a variety of grades and finishes to enable you to achieve the look and feel you want.

Simple to quote, made to order
Our streamlined process from design and specification to supply makes integrating exposed timber trusses into residential and commercial building designs simple and straightforward.

Step 1:
Complete and email a Truss Design Form and the building plan to your preferred timber merchant* to obtain a cost estimate.

Step 2:
Happy with the estimate? We proceed with the design. This includes sizing of the truss members and plate design.

Step 3:
We complete the design and PS1 certification and send it through.

Step 4:
Once the project is ready to proceed and the purchase order is placed, we manufacture the beams and plate to your design specifications.

Step 5:
Beams, plates and bolts are packaged together and delivered as a kit.

*Prolam Exposed Timber Trusses are available to be ordered through frame and truss wholesalers and merchants nationwide.

A cut above
• Premium visual grade structural timber
• Flexibility to match your design aesthetic
• Custom manufactured in a range of sizes and lengths
• Variety of finishes – machine finished or band sawn
• Treatments available for interior and exterior use
• Easy to specify with PS1 certification
• High dimensional stability (no twisting or warping)
• Made in New Zealand
• FSC certified timber options available

Complete the Truss Design Form

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 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. 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 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.

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.

Why Choose Prolam

Engineered Structural Timber Solutions

Specify with certainty