Specifying Glulam
EXTERIOR APPLICATION;
LOSP Treatment to H3 minimum (External moderate risk)
INTERIOR APPLICATION;
LOSP Treatment to H2 minimum (Internal high risk - termite resistant)
EACH BEAM stamped according to Engineering properties and as per Australian Standards
APPEARANCE GRADES
‘A’ Grade - Beams: Sanded, voids filled, with a premium clear finish
‘B’ Grade - Beams: Dressed, suitable for painting or framing applications
SERVICE GRADES (FOR EXTERNAL USE)
SERVICE CLASS 1 - Environmental conditions with EMC not to exceed 12% in service
SERVICE CLASS 2 - Environmental conditions with EMC up to 20% in service
SERVICE CLASS 3 - EMC will exceed 20% i.e. Fully exposed structures - bridges / pergolas. etc
GLULAM (GL GRADES)
New Engineering grades have been developed Nationally to define structural properties from the old "F" ratings used for solid timber and Glulam. The moduIus of EIasticity (E) is the structural value that governs deflection and design generally, ie. GL18 has an E value of 18.500 Mpa (F27)
PRECAMBER
Australian Standard camber is 600mm radius to compensate The influence of long beam sag under permanent dead load.
| Span m |
2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
| Camber mm |
.8 | 1.9 | 3.3 | 5.2 | 7.5 | 10.2 | 13.3 | 16.9 | 20.8 | 25.2 | 30.0 | 35.2 | 40.8 | 46.9 | 53.3 | 60.2 | 67.5 |
QUALITY ASSURANCE
All beams manufactured for structural applications must he third party accredited All Laminated Timber Supplies Products are produced in accordance with AS NZS1328.2, 1998 of the Glued Laminated Timber Association of Australia, from accredited members or products under accreditation.
HANDLING AND STOREAGE
All appearance grade Laminated Timber Supplies products will be supplied with plastic waterproof wrapping. The product should be kept dry off ground and handled with web slings only. It is recommended that beams or posts exposed to short or long term weathering should be coated with a ‘Cutek’ oil based product which, with successive coating and maintenance will ensure long life to the components and structure.