wisa - form birch
Download here our new data sheet from WISA-Form Birch
WISA-Form Birch is coated with a smooth and wear resistant phenolic film. Panels are used for concrete formwork. Standard colour is dark brown.
The product can be supplied also in special colours, for example light brown, black, green and opaque yellow. Special colours are not recommended for concrete formwork. They are well suited for example to interior decoration in building. One important end use are is the interior lining of delivery vans.
WISA-Form product family consists of many different products developed for specific end uses. Please see also WISA-Form Spruce and WISA-Form Super.
General product information
Product description
Phenolic film coated panel for usage in concrete formwork where high requirements are set on the concrete surface and the number of reuse.
Bonding
Phenolic resin cross-bonded weather resistant glueing according to EN 314-2/class 3 (DIN 68705 Teil 3: BFU 100; BS 6566 Part 8: WBP).
Surface
Face and reverse: Brown phenolic film (abt RAL 8017). Coatings 120 and 220 g/m2.
Edge protection: Acryl-based paint.
Machining
Edge and CNC machinings available on request.
Design information
Thicknesses and weights
Nom. thickn. mm |
No. of plies |
Min. thickn. mm |
Max. thickn. mm |
Weight kg/m2 abt |
6.5 |
5 |
6.1 |
6.9 |
4.6 |
9 |
7 |
8.8 |
9.5 |
6.3 |
12 |
9 |
11.5 |
12.5 |
8.4 |
15 |
11 |
14.3 |
15.3 |
10.5 |
18 |
13 |
17.1 |
18.1 |
12.6 |
21 |
15 |
20.0 |
20.9 |
14.7 |
24 |
17 |
22.9 |
23.7 |
16.8 |
27 |
19 |
25.2 |
26.8 |
18.9 |
Moisture content 8-10%
Panel sizes
1200/1250/1500 x 2400/2440/2500/3000/3600/4000 mm
Other dimensions on request.
Size tolerances:
< 1000 mm +/- 1 mm
1000-2000 mm +/- 2 mm
2000-4000 mm +/- 3 mm
Squareness tolerance:
+/- 1 mm / 1000 mm
Properties of panel surface
The values are approximate and meant for guidance when choosing the film thickness.
Taber abrasion DIN 53799:
Coating 120 g/m2 300 rev's
Coating 220 g/m2 600 rev's
Improved water resistance through coating.
The coating is resistant to weak alkalis.
Direct exposure to sunlight may accelerate the ageing and colour alterations of the surface.
The coating thickness must be chosen according to the designed concrete quality, number of reuses and casting conditions.
Strength values
Face grain perpendicular to supports
| Stud spacing mm | 200 |
250 |
300 |
350 |
Thicknesses mm |
Load kN/m2 |
Defl mm |
Load kN/m2 |
Defl mm |
Load kN/m2 |
Defl mm |
Load kN/m2 |
Defl mm |
12 |
49 |
0.5 |
39 |
0.8 |
26 |
1.0 |
18 |
1.2 |
15 |
60 |
0.4 |
48 |
0.7 |
40 |
1.0 |
29 |
1.2 |
18 |
71 |
0.4 |
57 |
0.6 |
48 |
0.8 |
41 |
1.1 |
21 |
83 |
0.4 |
66 |
0.5 |
55 |
0.7 |
47 |
1.0 |
Face grain parallel with supports
| Stud spacing mm | 200 |
250 |
300 |
350 |
Thicknesses mm |
Load kN/m2 |
Defl mm |
Load kN/m2 |
Defl mm |
Load kN/m2 |
Defl mm |
Load kN/m2 |
Defl mm |
12 |
45 |
0.7 |
27 |
0.8 |
17 |
1.0 |
12 |
1.2 |
15 |
60 |
0.5 |
46 |
0.8 |
31 |
1.0 |
22 |
1.2 |
18 |
71 |
0.5 |
57 |
0.7 |
46 |
1.0 |
34 |
1.2 |
21 |
83 |
0.4 |
66 |
0.6 |
55 |
0.8 |
46 |
1.1 |
Moisture content 27%
The design tables have been drawn up for average casting needs of 20-30 reuses. If the panels are used for a long period with repeated castings at short intervals or if the conditions are otherwise difficult, the load values need to be reduced by 20-30%. The users are advised to consult the supplier before the final design of the forms.
Installation instructions
- Cover the panels to protect them from direct sunshine and rain.
- Seal the cut edges and machinings made at site with paint suitable for exterior use.
- Use good quality form oil.
- Seal screw holes with silicone to reduce moisture absorption.
- Clean the panels carefully after every use.
- Handle panels with care to get maximum reuses possible.
Additional information
For further information of installation, maintenance, disposal, environmental matters etc. please contact your supplier or UPM.
Amendment of specifications
The UPM policy is one of continuous development. We reserve the right to amend specifications without notice or obligation.
Liabilities
Any defects other than caused by clearly verified production or service faults by the supplier are the responsibility of the user. Any claim for compensation is limited to the value of the defected panels.