You are using an outdated browser version not supported by this website.
Click here to upgrade your browser

InteriorInterior
IBuilt Glulam H5 Structural Posts
Description

IBuilt GL8 posts are treated to be used for in-ground applications including verandas, carports, and supporting decks, roofs and outdoor projects. Made from radiata pine and treated with MCA to hazard class H5. Construction is top, bottom and core made of finger-jointed lamina. Posts are dimensional stable and treated for in-ground use. All sizes available primed upon request.

Key Features
  • Post size: 88x88, 112x112, 135x135 and 180x180mm
  • Post lengths: 2.4 to 6.0m (180x180mm available in 3.6 or 4.2m)
  • Laminate species: Radiata pine (GL8)
  • Surface finish: Planed, Visual
  • Bond Type: Structural 'A' Bond
  • Durability: Minimum 50 years to meet NZBC clause B2
  • Manufacturing standard AS/NZS 1328:1998
NZ Made
NZ Made
Scope of Use

IBUILT™ H5 glue laminated posts (IBUILT™ H5 posts) are supplied for use as structural and non-structural posts. Their installation can be founded on a structural bracket or in a concrete foundation. Post applications include: verandas, carports and supporting decks and roofs.

Designed and installed in accordance with NZS 3604:2011 or specifically engineered to NZS 3603:1993 or NZS AS 1328.1:1998.

A permanent sealing system (oil based alkyd primer plus two topcoats) appropriate for the Hazard Classification and service location must be applied within 2 weeks of installation. The portion of the post that is to be in-ground must be sealed prior to being cast in concrete.

If the IBUILT H5 glue laminated posts are to be founded on a metal bracket, the following must be specified:

  • Fixings
  • Coating — above ground coating is mandatory in order to maintain the visual appearance

A permanent sealing system (oil based alkyd primer plus two topcoats) appropriate for the Hazard Classification and service location must be applied within 2 weeks of installation.

Finish: Any damage to the post, depressions, or temporary fixing holes must be filled and sanded. Apply a timber plug and exterior timber grade glue for large imperfections.

When coating the posts:

  • The coating must be applied within 14 days of installation
  • An oil based alkyd primer plus two topcoats, ensure adequate coating is applied as per the directions of the paint supplier’s data sheets
  • An LRV greater than 45% is recommended
Limitations on Use
  • Use Section 4 of NZS 3604:2011 must be used for the selection of structural brackets, subject to the NZS 3604:2011 exposure zones.
  • Post dimensions (width and thickness) must not be altered in a way that reduces their structural stability.
  • The post must be attached to a structural bracket that will resist all applied loads. Below ground applications.
  • Posts installed below ground must have their in-ground portion sealed. They must be seated on a 100mm punch pad and fully encased in concrete with a minimum 100mm side cover.
Statement of Building Code Compliance

Where subject to a building consent refer to the building consent plans and specifications for the size and location of the IBUILT™ H5 glue laminated posts, the depth of the footing, and fixings.

Where specific assemblies are not contained in the building consent documentation, refer to:

  • NZS 3604:2011
  • information from all suppliers (structural brackets, coatings, etc.)
Other Performance Attributes
  • Durability: Minimum 50 years to meet NZBC clause B2
  • Manufacturing standard AS/NZS 1328:1998
PASS
PASS
Documents
PASS Product Technical Statement: GL8

19300 10/2026

Design Guide: GL Posts

10/24

Warranty, Care & Maintenance Guide: IBuilt Glulam

09/24

Additional information

New Zealand Wood Products Ltd is a supplier of IBuilt engineered timber, glulam, plywood and associated materials.

Product Enquiries

News from New Zealand Wood Products Ltd

What a Bridge Designed for 100 Years Can Teach Us About Residential Flooring
Painting Plywood Dark Colours with CoreClad Primed
Don't Be Afraid of the Dark: Painting CoreClad Primed Black
Get a free weekly digest of essential news

New and updated architectural products, design solutions, inspiration, technical advice and more when you sign up for EBOSS.