Formwork panels

K1 yellowplan

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High load-bearing capacity, extreme stability and strength

Mayr-Melnhof Holz formwork panels guarantee many usage cycles at construction sites.

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The K1 yellowplan formwork panel from Mayr-Melnhof Holz is a proven and continuously improved timber formwork product for concrete construction. This internationally established formwork panel is used wherever quality, long service life and variable use are required. K1 yellowplan panels are 3-ply bonded panels available in the large 2 x 6 metre format and thicknesses ranging from 21 to 27 millimetres and is afterwards cut to smaller standard formats: A closed, laminated cover and middle layer without edge bands and predominantly vertical growth rings is the basis for the K1's typical concrete finish.

HT 20plus Formwork Beams
Sustainability & raw material use

K1 yellowplan: Benefits
  • High dimensional stability thanks to solid, laminated cover and middle layers 
  • Stable longitudinal edges thanks to closely bonded middle layers
  • Optimal pore structure thanks to completely sanded surface and high-quality melamine resin coating
  • PU edge sealing prevents moisture ingress and concrete sludge adhesion (upon request)
K1 yellowplan: Product standards
  • ON B3023 Solid wood panels: 3-ply formwork panels
  • EN 13353 Solid wood panels (SWP): Requirements

In terms of building law, formwork panels do not require marking.
We print the production code visibly onto every K1 yellowplan formwork panel.

K1 yellowplan: Technical specifications
Wood species Spruce (Picea Abies), Fir (Abies)
Design 3-ply structural panel, glued crosswise
Completely and evenly sanded cover and middle layers
Closely bonded middle layer resulting in stable longitudinal edge
Laminated cover and middle layer, no edge bands
Sturdy melamine resin coating
Surface Completely sanded surface
Sturdy melamine resin coating
Edge coating Grey, yellow or red water-based edge paint
PU edge sealing, red upon request
Moisture content 12 % (± 3 %)
Gluing Alkali-, water- and weatherproof bonding
according to ON B 3023
Fire class D-s2, d0
Product standard ÖN B 3023, EN 13017-1 Tab. 1, ÖN B 3023 smooth (GL), EN 13354, EN 13353
Weight and dimensions  
Standard format  Length Width
100 cm 50 cm
150 cm 50 cm
200 cm 50 cm
250 cm 50 cm
300 cm 50 cm
Large formats  Length Width
200 cm 100 cm / 150 cm / 200 cm
250 cm 100 cm / 150 cm / 200 cm
300 cm 100 cm / 150 cm / 200 cm
400 cm 50 cm / 100 cm / 150 cm / 200 cm
500 cm 50 cm / 100 cm / 150 cm / 200 cm
600 cm 50 cm / 100 cm / 150 cm / 200 cm
Thickness 21 mm 27 mm
Weight approx. 10,0 kg/m² approx. 12,5 kg/m²
Thickness 21 mm and 27 mm ± 1 mm
Widths 50 ≤ 200 cm ± 1 mm
Length 100 ≤ 250 cm ± 1 mm
300 ≤ 600 cm ± 2 mm
Longitudinal curvature 100 ≤ 300 cm ± 1 mm
301 ≤ 600 cm ± 1.5 mm
Widths < 50 cm ± 1 ‰
Calculated values

Mechanical properties acc. to ÖN B 3023 for nominal thicknesses of 21 mm and 27 mm

The calculated values apply to a wood moisture of 12 %. In case of strong moisture saturation up to the fibre saturation point, the values for bending strength and flexural modulus may be reduced by up to 30 %.

Mean modulus of elasticity 10,000 N/mm²
Characteristic value of bending strength 22 N/mm²
Packaging Packages: 50 units of 21 mm or 40 units of 27 mm thickness
• delivered together with supporting timber for stacking at the construction site
• packaging units for large format panels as per arrangement
Mayr-Melnhof Holz: Logistics services


  • Long-standing stable business relationships with a large number of logistics service providers in Europe.
  • We use digital platforms for fast communication with our transport service providers.


  • Loading into shipping containers is possible at all sites.
  • With trusted logistics partnerss we are able to offer fast and reliable container shipments worldwide.
  • Subject inducement we can offer breakbulk shipments from the Adriatic, Baltic and North Seas.
  • With our own port terminal in Koper, Slovenia, we have regular chartered services to southern Mediterranean ports & beyond.


  • All Mayr-Melnhof Holz sawmills in Leoben (AT) & Paskov (CZ) as well as our timber processing plants in Gaishorn (AT) & Wismar (DE) are directly connected to national railway networks.
  • We use both private & public rail service providers to transport goods in an environmentally friendly manner.

Delivery to construction sites

  • Just-in-time deliveries to our cross-laminated and glulam construction sites.
  • A full range of modern transport solutions is offered as necessary:
    • all-wheel drive trucks
    • narrow-access self-steering trailers
    • hydraulically steered trailers
    • solo vehicles with up to 10 m loading length for inner-city areas
    • covered loads up to 3,5 m wide 
    • loads up to 52 m length
    • trailers with on-board forklifts
    • Edscha sliding roof trailers for vertical access

Together with our logistics partners we will provide you with professional documentation to enable you to cover all your export, import, and customs formalities without problems. 

Downloads & Certificates

Choose products from Mayr-Melnhof Holz with confidence. The raw material we use, our supply chains and our productionprocesses are subject to rigorous internal and third-party controls. Our certification and technical standards confirm our far-reaching efforts.


Find your personal contact person at Mayr-Melnhof Holz