MINUTES
AUCKLAND BRANCH
TRAINING AND NETWORKING EVENT
held on
Wednesday, 22nd August at 6.00pm
at
Alexandra Park, Top of the Park
Greenlane, Auckland
Welcome:
Branch Chair Glynn Robertson opened the meeting, welcoming members, new members, and guests as well as extending a special welcome to the event's sponsor, XLam
Attendance:
58 Recorded their attendance
(44 RSVP'ed)
Apologies:
Dennis Morgan, Craig Lewis
Moved: Nick Riedel Seconded: Clyde Robinson
Acceptance of minutes
• Included Offsite meeting
Moved: Ted Jones Seconded: Craig Tibbits
Correspondence In/Out:
• None
Moved: Nick Riedel Seconded: Peter Laurenson
General Business:
Peter Laurenson:
• 20 people have registered for the certificate to Building Regulatory Environment.
• Courses are aimed at LBP's, Engineers, Council environment and covers the key regulatory environment.
• Training Opportunities: If someone's willing to provide training please speak to Dan
• Building surveyor courses - 21st - 23rd September 2018 in Wellington
• Building surveyor courses - 16th - 18th November 2018 in Auckland
• Presentation from MBIE - Product assurance, risk, liability and building consent. You can have your say for or against it!
Guest Presentation:
XLam, John Eastwood, Head of Business Development ANZ
Keynotes:
1. XLAM Introduction
• Mass Timber construction. Fairly common products.
• Offsite manufacturing.
2. Introduction
• John, over fifteen years in manufacturing of building materials.
• Only Australasian CLT manufacturer with plants in Nelson, New Zealand and Australia.
• XLAM have provided over 400 projects in New Zealand.
• CLT = Cross Laminated Timber.
3. Mass Timber Construction
• Timber is the main product and looking into core products/fibres.
• Used for varieties of building components i.e. walls, floors and stairs etc.
• Key ingredient is timber.
• XLAM also works well within hybrid building. For example, XLAM also combines with concrete and steel structures
4. Products
• Glulam
• CLT
• LVL
• I-joists
5. Durability
• Fire
• Decay - Rot, mould Etc
• Termites - Land and Marine
• Insects
• Chemicals
• Weathering
• Failure of services
• Durability consideration of mass timber product. It's not just how it is tested it is also about how it is designed
6. How is durability achieved
• Good design - Key areas e.g. roof covering on battens, gutter, plasterboard, wood fibre insulation, ventilated timber cladding.
• Superior Workmanship - ensuring working in accordance with specs, architectural detailing and design.
• Treatment Options - All about timber
a) Vacuum pressure - Timber enters vessel with increasing high level pressure and vacuum to achieve the desired level of treatment.
b) Glueline Treatment - The preservative is added to the glueline of the products such as plywood, laminated veneer during manufacturing of the product. The product is protected against insect and termite attack.
c) Envelope Treatment - The process used cause the preservative to penetrate 2-10mm into the timber member.
7. General - Heartwood and Sapwood
• Heartwood is the heart of the tree. Issue with heartwood is that it cannot be treated with chemicals.
• Sapwood - Outer Layer - good for primary harvesting to produce timber framing for houses. The key here is the type of treatment that is achieved.
8. Building Code Requirements
• H1.2 and H3.2 - Major focus. Works on AS and ISO standard.
• XLM CLT Treatment Solution: Exterior roof, Subwalls - H1.2
• Area where XLAM can't get to - floors, bathrooms etc are treated to H3.2
9. Technical Guide and Supporting Documents
• Latest issue published in September 2016
• Three sections:
o Structural design
o Fire Design
o Acoustic Design - Supported by acoustic Predictor
10. Code Compliance
• As/NZS 1328:1998 Glue laminated timber parts 1 and 2
• AS/NZS 1491:1996 Finger jointed Structural Timber
• ISO/TC 165 (Working Draft) - Timber Structures
• XLAM - Alternative Solution - since 2012
• Over 400 projects have been approved
• For use of XLAM Radiata Pine cross laminated timber
11. XLam Product Guide - August 2017
• There are about ten topics in it. Easily available for architects and engineers. It's about three pages.
• Addresses topics such as:
o Design and construction tolerances.
o Lifting systems for panels.
o Surface layer board cupping and shrinkage.
o Effect of weather on durability and structure.
o Protection etc.
12. XLam Site Guide - March 2018
• Twelve sections - Preparatory, factory dispatch, unloading of panels, handling and lifting, pre-assembly checks, panel assembly, panel connection, weather protection, visual surface and XLAM support.
13. How is XLam CLT Made
• Recent project - Housing New Zealand.
o Step 1 - Computerised Crosscutting.
o Step 2 - Finger-jointing.
o Step 3 - Planning to size - Needs to be planed within 24 hrs or else the timber is rejected.
o Step 4 - CNC (Computer Numerical Cutting) - Cutting individual panels. Square them up and prepare lap joints and incorporate any penetrations etc. (windows doors etc).
o Step 5 - Layup and pressing - Vaccum press and let the glue settled.
14. General XLam
• There is a QR code on each panel for specific locations. As per the shop drawings.
• Wall lining can directly go on the panels.
• There are hooks on each panel for carefully lifting and placing the panels.
• Every panel that is manufactured is tested separately. Where CLT is failing it's actually in the fibre. Moisture test is conducted for each panel. Simulating every 30 years. Testing shall be conducted all the way through from the manufacturing process.
• Transportation - Indication given to the builder as to which panel is arriving - sequencing being done for trucks that turn up on site.
15. Q and A's:
Q - Does CLT need to be thicker than glulam to allow for the span?
A - XLam strengthens the actual panel to incorporate the thickness.
Q - How is the product repaired because it would be difficult to cut the section?
A - XLam has a team to repair and cut the section to remediate.
Q - Are the collars or penetrations been tested to the actual panels?
A - Testing has been done with respect to Promat. The penetration holes are pre-drilled to mm.
Contract managers work in conjunction with the project team.
Q - Timeframe for construction?
A - About an hour and half to do a 120sqm of floor.
Q - Is it stable to moisture… doesn't shrink?
A - Dimensionally stable, regular inspection conducted for moisture.
Q - Span for barriers?
A - Depending on the thickness - 200-225mm.
Q - Are the panel's edge glued?
A - Only surface gluing no edge gluing.
Q - Anything on YouTube?
A - Information is available.
Q - Are pipe penetrations incorporated in the design?
A - Yes.
Q - Seismic performance
A - Proven results. Seismic performance is very good.
Q - What about the R value?
A - 100mm panel - R0.8 value. There is information in the product manual. R values are calculated and included in the product manual.
Q - As a building surveyor what are we supposed to inspect, just conventional paperwork or Quality Assessment?
A - Just a pre-line inspection should suffice. There is a whole lot of testing already conducted on the panels.
Q - How do we learn more about XLam products?
A - Design guides, site guides etc. Contains useful information to learn.
Q - What sort of PS do you provide?
A - XLAM provides PS3 - Manufacturer's
Glynn Robertson the Auckland Branch Chairperson thanked all presenters and sponsors for the evening.
Meeting was closed at 7.30pm
Next Branch Training and Networking Event: Scheduled for 19th September at Alexandra Park
Hasan Shueb
Auckland Branch Secretary
