Framing – J-Frame

J-Frame Overview

J-Frame Treatment Process

Archipro J-Frame

J-FRAME is a general purpose Structural Laminated Veneer Lumber (LVL) gauged Framing timber manufactured by Juken New Zealand Ltd (JNL) from 100% renewable Radiata Pine, plantation forest. As a reliable straight and durable product, J-Frame can be used in a wide range of applications including residential and commercial framing and truss systems. J-FRAME is an independently certified engineered wood product, to AS/NZS4357 (Structural LVL) and is made in accordance with strict quality and environmental standards. (Refer Product & Process Integrity comments).


J-FRAME Structural LVL uses Phenol Formaldehyde Resin to produce an A bond classification. This bond has a proven, internationally recognised durability record for exposure to moisture and stress. Australian Standard AS2754.1 “Adhesive for Timber and Timber Products” states:

“Type A bonded laminated veneer lumber [LVL] can be used in applications involving extreme long-term exposure to weather or wet or damp conditions and/or long-term structural performance requirements without glue line break-down or glue line creep.”

Moisture Content

J-FRAME is supplied to market with a targeted moisture content of 18%. Glue lines in LVL can affect moisture content measurements. Moisture equivalency tables for J-Frame developed by Scion are available at


J-Frame has Codemark product certification for use where hazard class H1.2 or less applies.

Stress Grading

J-FRAME is designed during the manufacturing process for consistency in strength, stiffness and stability. The design enables JNL to sort by grade into LVL8 and LVL10. Both LVL8 and LVL10 meets or exceeds the equivalent stress for SG8 and SG10 grades in NZS3603 Amendment No.4 Table 2.3.

Finger Jointing

Standard lengths of J-FRAME over 3 metres will have one finger joint per length. Finger joints are certified by the EWPAA to AS/NZS1491 Finger Jointed Structural Timber. Additional testing for bond durability is performed by JNL and verified by the EWPAA in accordance with AS5068.

Product Identification

J-FRAME is printed and/or labelled to show applicable standards, treatment classification, certifying bodies and the assigned stress grade.

J-FRAME should be kept dry when being stored. Place on ground with packers and cover with water proof plastic to prevent moisture.

  • Minimise exposure to weather and rain.
  • Protect Frames and Trusses as soon as possible.
  • Dry out before covering/lining after exposure to wetting.

Product and Process Integrity

The Engineered Wood Products Association of Australasia (EWPAA), SGS and the New Zealand Forest institute (Scion), audit and both verify and certify JNL’s quality systems and products.

JNL is certified to both ISO9001 Quality, and ISO140001 Environmental Standards, both of which demand in-house documented procedures, training programs and process control systems.

Rigorous product testing as stipulated in the applicable standards is performed on each J-FRAME manufacturing batch by JNL’s Quality Assurance Department. This testing is run simultaneously with the EWPAA test sample submission program.

The JNL Wairarapa Mill has been manufacturing LVL for over 20 years and has attained Forestry Stewardship Council (FSC) Chain of Custody (COC), testifying that the Pinus Radiata used in J-FRAME is from a sustainable, environmentally managed forest resource.


J-FRAME is supplied in varying lengths:

  • Standard Lengths at 2.4, 3.0 and 6.0 metres
  • Cut-to-Length studs at 2.33, 2.48, and 2.63 metres.

The cut-to-length studs are “ready to use” with final length tolerance of +0.5mm.

Width and Thickness

J-FRAME is sold as dressed dry sizes of:

90mm x 45mm
140mm x 45mm
190mm x 45mm
240mm x 45mm

Product certification (CodeMark) is a voluntary scheme that provides an easily-understood and robust way to show that a building product or system meets the requirements of the New Zealand Building Code.

CodeMark - J-Frame & J-Lintel (444 KB)

Certificate Number: AQ-180615-CMNZ




J-Frame - Product Assurance Supplier Statement (PASS) (505 KB)
J-Frame & J-Lintel Design and Installation Guide (2 MB)
J-Frame & J-Lintel Care and Maintenance (97 KB)
J-Frame & J-Lintel Basis for Certification (116 KB)



J-Frame - Minor Variation Advice (364 KB)
Auckland Council Clarification (39 KB)
Ministry of Business Innovation & Employment Letter (83 KB)
Procedure for testing moisture content of J-Frame 100915 (37 KB)



BRANZ Appraisal: No. 646 (2014)

BRANZ - J-Frame (472 KB)






 J-Frame Treatment Process

J-Frame Product Testimonials

Truss Tech

Central Group

McAuley's Transport

Capital Precut Solutions

How can I measure moisture content in J-Frame?
Scion has developed a guideline for builders and compliance officers to use when checking moisture in LVL products such as J-Frame. Click the links below for a PDF copy of the moisture correction tables.

Procedure for testing moisture content of J-Frame 100915 (37 KB)


Do I have to re-treat cut edges of J-Frame?
It is not mandatory to apply supplementary treatment on cut ends, drilled holds etc. However, JNL supports the view of the NZ Treatment Preservation Council (NZTPC) that supplementary treatment is best practice for all boron treatments. If you are considering supplementary treatment the attached technical documents would be suitable where hazard class H1.2 or less applies.

BAX-R can be purchased from TimTech. Contact – Paula Fisher – 021 816 522 for a price and mixing ratio.

Holdfast Metalex Timber Preservative Green Concentrated Data Sheet (84 KB)
Holdfast Metalex Wood Protector Data Sheet (87 KB)
PROTIM FrameSaver (662 KB)
BAX-R Brochure (812 KB)


What is the benefit of CodeMark certification?
J-Frame with CodeMark is your guarantee of compliance with all councils in New Zealand. Section 19 (1)(d) of the Act requires that a Building Consent Authority [BCA] MUST accept a current product certificate as establishing compliance provided that all conditions have been met. Please see the attached letter from Auckland City Council.

CodeMark - J-Frame & J-Lintel (444 KB) Certificate Number: AQ-180615-CMNZ
Auckland Council Clarification (39 KB)


Do I need a minor variation to use J-Frame in my house plans?

There is no one answer for minor variations and how they are applied. The attached document will provide guidance on how to better understand minor variations and what potentially could trigger one.

J-Frame - Minor Variation Advice (364 KB)
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