Hasslacher Group Girder Longitudinally Tensiletested Timber
GLT® - TIMBER
GIRDER LONGITUDINALLY TENSILETESTED TIMBER
GLT® is a cost-effective alternative to glued laminated timber, solid timber and finger jointed structural timber.
They have the same load-bearing capacity as glued laminated timber and can therefore be used as a substitute for glued laminated timber in virtually any situation. Each GLT® is individual tensile tested under extreme conditions.
FEATURES
QUALITY GRADING
Specially selected and certified sawn timber is produced, kiln-dried and pre-graded by our specialists at the company’s own sawing works.
HIGH-TECH STRENGTH GRADING
The latest X-ray and laser technology enables the uncompromising recognition and elimination of strength-related deficiencies in the wood.
PATENTED TENSILE TESTING
Usually the strength of supporting components is only monitored based on random sampling – that is not the case with GLT®. Each GLT® beam is subject to the patented tensile proof loading process over the whole length of the beam in accordance with ÖNORM B 4125 and therefore comprehensive quality assurance is ensured.
ADVANTAGES
- Volume and cost saving of up to 30 %
- Easy in dimensioning like glued laminated timber
- Highest levels of safety along finger joints thanks to tensile proof loading
- CE-certified in accordance with ETA-13/0644
- High load bearing capacity with low density
- Transparent glue lines on finger joints
- Cut to exact lengths of up to 18 m
- Included in standard design software
- Available in visible and industrial qualities
APPLICATIONS
- Hall and industrial construction
- Multi-storey residential buildings
- Single and multi-family homes
- Constructive timber engineering
- Schools, Colleges and Universities.
- Timber Frame Building
USES
- Rafter-supporting purlins in hall construction
- Rafters and purlins as roof constructions
- Main beam in floors incl. in visible areas
- Highly stressed bending beams
- Timber Frame studs, trimmers, headers and soleplates
INFORMATION
PRODUCTION
Made in Austria
STRENGTH CLASSES
GLT ® 24
MOISTURE CONTENT
15% ±3%
CHARACTERISTICS
- Cost effective
- High strength
- Easy dimensioning
BONDING
Polyurethane adhesive type I according to EN 301, approved for bondinxg loadbearing and non-loadbearing timber components, both indoors and outdoors.
THERMAL CAPACITY
1600 J/kgK
THERMAL CONDUCTIVITY
l = 0.13 W/mK
STRUCTURAL FIRE RESISTANCE
0.80 mm/min in accordance to EN 1995-1-2
WOOD SPECIES
- Spruce
- Fir
SERVICE CLASSES (EN 1995-1-1)
- Service class 1 heated interior
- Service class 2 roofed outdoor area
DENSITY
In dependence of the strength class, approximately 450 kg/m³ to 500 kg/m³ in average
TENSILE PROOF LOADING
- ETA-13/0644
- ON B 4125
SURFACE QUALITIES
- Visual quality
- Industrial quality
CERTIFICATION
CE-certified in accordance with ETA-13/0644 | PEFC certified wood (on request)
FIRE BEHAVIOUR
- D-s2, d0
- D fl -s1, when used as floor covering
DIFFUSION RESISTANCE
- According to EN ISO 10456
- M = 50 (dry) to 20 (wet)
SHRINKAGE AND SWELLING BEHAVIOUR
- Perpendicular to the grain direction : au,90 = 0.24% per 1% change in moisture conten
- Parallel to the grain direction : au,0 = 0.01% per 1% change in moisture conten
FORMALDEHYDE EMISSIONS
- E1 according to EN 717-1 (<0.1 ppm)
- Polyurethane adhesive is free of formaldehyde.
DIMENSIONAL TOLERANCES
- Cross section : in accordance to EN 15497
- Twist/warping : in accordance to DIN 4074-1
- Length : in accordance to EN 1408
TENSILE STRESSES DUE TO TESTING
- 60% of the characteristic tensile strength
- GLT ® 24 8.4 N/mm²
DIMENSIONS
- Heights : 120 to 280 mm in 20 mm steps
- Widths : 60 mm to 140 mm in 20 mm steps
- Lengths : Standard – 13 m
- Specific lengths : 2.50 m up to 18.0 m are possible