Types of Wood
 |
Spruce (picea spp.) |
Bulk Density
|
Spruce:
12 = approx. 450 kg/m³ |
Moisture Content
Approx. 10 to 12% ± 2%
on delivery
Certificates
|
DIN 1052 |
|
EN 386 |
|
JAS (Richen) |
|
ISO 9001 (Reuthe) |
Strengths
|
BS 11 (GL 24) |
|
BS 14 (GL 28) |
|
BS 16 (GL 32) |
|
BS 18 (GL 36) |
Gluing
|
Waterproof glues/adhesives approved by the
building authorities in accordance with EN 386 and DIN 1052, licensed
for interiors and exteriors |
|
MUF adhesive with light-coloured glue line (all
sections up to b = 24 cm) |
|
RF glues with dark-coloured glue line for block
bonds with glulam widths >28 cm (Reuthe only) |
|
|
|
Lamella Thicknesses
|
Straight, parallel glulam in accordance with DIN 1052/EN 386
up to max. 42 mm |
|
Arched, curved components, see glulam special
shapes, lamella thickness
d = r/200 |
Appearance Grades
|
Architectural |
|
Industrial |
|
Natural (architectural appearance without repairs) |
Surface Quality Criteria
|
4 sides clean planed |
|
Edges with approx. 3 mm chamfer |
|
Light-coloured glue line |
|
Shrinkage cracks may arise due to the natural
shrinking and swelling behaviour depending on the ambient conditions.
See also the note
on “Crack Formation” in the technical data sheet |
| Surface |
Description |
Availability |
| Architectural grade |
4 sides clean planed |
Kaufmann standard
|
| Blue stain and red striping permissible on
10% of surface |
| Firmly intergrown knots permissible |
| Loose knots with dia. > 20 mm will be replaced |
| Industrial grade |
4 sides clean planed |
On request |
| No requirements on surface |
| Natural grade |
As architectural quality but without repairs
(wooden plugs) |
On request |
Surface Treatment
|
Untreated |
|
Colourless impregnation on request |
|
Coloured stains and lacquers on request (Reuthe
only)
It is recommended that lacquers are not applied until the equilibrium
moisture content (EMC) has been reached. |
Dimensional Tolerances
Finished sizes in acc. with EN 390
“Glulam limit tolerances” with measuring reference moisture
of 15%
| Width of section |
All widths |
| Width tolerance |
± 2 mm |
| Height of section |
< 400 mm |
> 400 mm |
| Height tolerance |
+ 4 mm / – 2 mm |
+ 1% / – 0.5 % |
| Beam lengths |
< 2.0 m |
2.0 m bis < 20 m |
> 20 m |
| Length tolerance |
± 2 mm |
± 0.1 % |
± 20 mm |
|
|
|
Glulam Sections
|
Widths from 6 cm |
Reuthe:
Kalwang:
Richen: |
up to 28 cm
up to 24 cm
up to 24 cm |
|
? Heights from 12 cm |
Reuthe:
Kalwang:
Richen: |
up to 200 cm
up to 220 cm
up to 88 cm |
|
? Lengths from 3 m |
Reuthe:
Kalwang:
Richen: |
up to 32,50 m
up to 36 m
up to 24 m |
Glulam Standard Sections
|
Widths from 6 cm in 2 cm steps up to max.
24 cm |
|
Heights from 12 cm in 4 cm steps up to max. press
height
Exceptions 10/10 and 14/14 cm |
|
Standard sections result from the availability
of the raw material in Central Europe |
|
Standard sections are stock sections, i.e. they
are low-priced and generally immediately available |
|
Other sections can be produced without a problem
in all Kaufmann factories, the calculation dimension is the next
larger standard section, e.g. delivery dimension 9/23 cm = calculation
dimension 10/24 cm |
|
Technical Data
|
Stock beams
e.g. 12, 13, 60 and 18 m, produced with a few cm oversize, cut
ends upon request |
|
Commissions from 3 m |
Reuthe
Kalwang
Richen |
up to 32.50 m
up to 36 m
up to 24 m |
|
Multiple lengths
Individual lengths (commissions) are generally produced and delivered
in multiple lengths with an additional measurement of 1 cm per
individual length. In this case the multiple length is limited
to either the transport length (12 or 13.60 m) or the longest
length of the commission. |
|
Fixed length
Precision double end trim of individual components with ± 2 mm tolerance.
Possible on request at extra cost. |
|
|
|
Shrinkage and Swelling Behaviour
|
Shrinkage and swelling dimensions per 1% of change in moisture
of timber: |
| |
Length:
Radial:
Tangential: |
0.01 – 0.02%
0.19 %
0.34 % |
|
An equilibrium moisture content of
approx. 9% is to be anticipated in closed, normally ventilated
rooms. |
Joining Work
|
Exact cut to size according to timber list
in all Kaufmann factories |
|
Additional joining services including CNC processing
on in Reuthe factory |
|
|
|
Packaging
|
Packed in bundles or individually in plastic
film |
|
Film serves as transport protection against dirt
and spray water |
|
Film only protects the glulam against UV radiation
and water absorption to a certain extent |
|
The film is not suitable for storing the glulam
for longer periods |
|
Short-term ingress of water into the package
does not signify a defect. If water has entered the package, remove
the film quickly and ensure good circulation |
|
|
|
Labelling of Goods and Packages
|
Component labels with details of customer, job
number, strength, quality and delivery date |
|
Package label with details of customer, commission,
delivery address and package contents including number of items,
sections, lengths and cubature (Kalwang and Richen) |
|
Further identification of the components in acc.
with standards and specifications, e.g. BS 14, BS 16 and BS 18
|
Storage
|
Interim storage in roofed hall if possible |
|
As far as possible protect glulam against external
weather conditions, e.g. cover with tarpaulin during assembly and
installation |
|
Glulam is a processed natural product and should
accordingly be treated with care. |
|
