140x140mm Merbau GL13 Laminated Post

140x140mm Merbau GL13 Laminated Post

GL13 Merbau Posts offer high structural strength (load-bearing), Class 1 above-ground durability (40+ years), termite/rot resistance, stability (kiln-dried, low movement), and are suitable for demanding external structural uses like pergolas, beams, and screening, combining aesthetic appeal with robust performance. The GL13 grade indicates engineered strength, while natural Merbau provides inherent resistance, making it a premium choice for visible structural applications. 

Structural & Performance Ratings

• Strength Grade: GL13 (Glued Laminated Timber Grade 13) – Meets strict standards for high load-bearing capacity, suitable for structural frameworks.
• Durability: Class 1 (Above Ground) – Excellent natural resistance to decay, termites, and weathering, with an effective life over 40 years.
• Bushfire Rating: Can be rated up to BAL19 for bushfire-prone areas.
• Service Class: Service Class 3 – Suitable for external exposure (sun/rain). 

Key Features & Benefits

• Engineered Stability: Kiln-dried and finger-jointed (FJ) for minimal shrinkage, warping, or twisting.
• Versatile Use: Ideal for pergolas, verandahs, decks, screening, and structural posts where appearance matters.
• Aesthetics: Rich, reddish-brown colour with attractive grain for a premium finish.
• Low Maintenance: Durable enough for outdoor exposure, requiring occasional oiling/sealing to maintain colour. 

Typical Specifications

• Material: Kiln Dried (KD) Merbau
• Construction: Finger-Jointed (FJ) and Glued Laminated (GL) for strength.
• Adhesive: Durable, waterproof phenolic adhesives
• Common Sizes: 90x90mm, 100x100mm, 115x115mm, 140x140mm, 190x190mm, 240x240mm, 290x290mm and other custom sizes for larger spans.
• Applications: Pergolas, gazebos, veranda posts, decking, and structural beams.
• Installation: Suitable for above-ground, fully exposed environments. 

Note: Merbau is known to be tannin-rich, which can lead to leaching; care is required during installation to avoid staining surrounding surfaces.