Glulam consists of at least three slats glued to each other. Multiple gluing provides a higher carrying capacity than normal timber. Besides very large cross sections and lengths are available. Glulam is dimensionally accurate and dimensionally stable and less susceptible to cracking. It maintains an equally good quality from a quality-controlled production. Glulam is a calculable building material due to exactly defined properties.
Merkle Holz offers:
| Sorting feature | Requirements on glulam | |
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Visual quality |
Industrial quality |
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| Sorting class | GL 24 c, GL 24 h and GL 28 c | |
| Technical rules | DIN 1052:2008 or DIN EN 14080:2013 | |
| Elasticity module II to grain | GL 24 c: Eo,mean = 11.000 N/mm2 GL 24 h: Eo,mean = 11.500 N/mm2 GL 28 c: Eo,mean = 12.500 N/mm2 |
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| Timber moisture |
max. 15% | |
| Dimensional accuracy (to EN 390) |
Width ± 2 mm Height + 1%/-0,5% Length ± 0,1% |
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| Lamella Thickness | 40 mm | |
| Repaired knots and defective spots | Permissible | not necessary |
| Dropped-out and loose knots | up to Ø ≤ 20 mm permissible from Ø ≥ 20 mm to be replaced at the factory |
Permissible |
| Shrinkage cracks | up to 4 mm | without limitation |
| Resin galls | Resin galls up to 5 mm wide are permissible | Permissible |
| Discolouration due to blue stain, red or brown strips |
not permitted | without limitation |
| Insect attack | not permitted | permissible are worm grooves up to 2 mm |
| Surface | planed and chamfered | flush |
Spruce glulam
Produced from clean Middle-European spruce.
Larch glulam
Produced from closely ringed low-sap mountain larch (inquire for delivery programme).
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Height |
Width (mm) | ||||||||||||
| 60 | 80 | 100 | 120 | 140 | 160 | 180 | 200 | 220 | 240 | 260 | 280 | 300 | |
| 80 120 160 200 240 280 320 360 400 440 480 520 560 600 640 680 720 760 800 |
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