Explanatory notes on NOE Design Calculation App
for NOE H 20 deck formwork edge and intermediate primary beams

The calculation equations are based on the design loads in EN 12812:

Formwork weight g = 0.35 kN/m²
Live load: v = 0.75 kN/m²
Concrete load b= 25 x d kN/m²
Concrete surcharge p = 0.1 x b kN/m²
0.75 ≤ p ≤ 1.75 kN/m²
Total load q= g + v + b + p
Bending deflection formwork l/500 in acc. with EN 12812

❶ Boarding support beam

❷ Edge primary beam S_R

❸ Intermediate primary beam S_M

❹ Boarding support beam spacing a

Assuming the use of 22 mm three-ply panels supported transversely to the fibre direction.
The maximum permissible primary beam spacing must be observed.
Maximum deflection of the three-ply panels: a/500 for loading in acc. with EN 12812.

Boarding support beam spacing a (mm)	Maximum deck thickness d (mm)
500	400
625	320
750	220

The maximum possible boarding support beam spacing a is preset by entering the deck thickness.

❺ Primary beam spacing L

Maximum deflection of the boarding support beam: L/500 for loading in acc. with EN 12812.

The maximum possible primary beam spacing is determined from the deck thickness and the boarding support beam spacing. The maximum permissible boarding support beam spacing a must not be exceeded.

❻ Prop spacing S_R for edge primary beam

Deflection of the primary beam maximum S/500 for loading in acc. with EN 12812. The maximum possible edge prop spacing is determined from the deck thickness, boarding support beam spacing, primary beam spacing and edge span length. The maximum permissible boarding support beam spacing a and primary beam spacing L must not be exceeded.

❼ Prop spacing S_M for intermediate primary beams

Deflection of the primary beam maximum S/500 for loading in acc. with EN 12812. The maximum possible intermediate prop spacing is determined by the deck thickness, boarding support beam spacing and primary beam spacing. The maximum permissible boarding support beam spacing a and primary beam spacing L must not be exceeded.