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Substitution of steel spring by S-Ply® leaf spring   Due to their  greater spring action, steel spring packages can be replaced by fewer or even one S-Ply® leaf spring for many applications.   Example:   a) Substitution   b) Cost calculation   Steel leaf spring: 155 x 25 x 2 mm 1 package of 10 springs   S-Ply® leaf spring: It is essential:   with: hS-Ply = Thickness of S-Ply® spring hStahl = Thickness of steel spring nStahl = Amount of steel springs EStahl = Modulus of elasticity (here 210.000 N/mm2) ES-Ply = Modulus of elasticity of S-Ply® leaf spring (here 28.000 N/mm2)   The result is that 10 steel leaf springs with a thickness of 2 mm each can be replaced by only 1 S-Ply® leaf spring with the thickness of 8,5 mm. Steel leaf spring* 10 pieces at 1,20 € = 12,00 € Intermediate package layers 18 pieces at 0,12 € = 2,16 € Total costs 14,16 € * purchase quantity > 1000 pieces, status 2009   S-Ply® leaf spring** 1 pc. at 4,13 € = 4,13 € shim plates (if applicable) 4 pc. at 0,12 € = 0,48

Frame made of aluminium profile bars connected by "Tox" connections - All-round EPDM lip seal - Restraint security - Hidden latches - Screwed GKF gypsum plasterboard Tested for fire resistance from underneath (room side) NF EN 1634-1: +A1: 2018EN 1634-1: +A1: 2018 Fire dampers EI 60 are designed to be installed in false ceilings for self-contained fire protection, one of the requirements being "combustible load only on the room side" and the fire resistance class being EI 60. They provide effective protection against the progression of fire from the room into the false ceiling area. The integrated aluminium frame is equipped with a fire stop. The cover of the inspection hatch is fitted with a DF fire protection plate and protected against smoke entry by a versatile all-round seal. The cover is secured on both sides by automatic safety hooking arms.

Frame made of aluminium profile bars connected by "Tox" connections - All-round EPDM lip seal - Restraint security - Hidden latches - Screwed GKF gypsum plasterboards Tested for fire resistance from underneath (room side) NF EN 1634-1: +A1: 2018 Fire dampers EI 120 are designed to be installed in false ceilings for self-contained fire protection, one of the requirements being "combustible load only on the room side" and the fire resistance class being EI 120. They provide effective protection against the progression of fire from the room into the false ceiling area. The integrated aluminium frame is equipped with a fire stop. The cover of the inspection hatch is fitted with a DF fire protection plate and protected against smoke entry by a versatile all-round seal. The cover is secured on both sides by automatic safety hooking arms.

Frame made of aluminium profile bars connected by "Tox" connections - Intumescent gas, smoke and flame tight seal in case of fire - Restraint security - Hidden latches - Screwed GKF gypsum plasterboards - Quick and easy installation The 60-minute ceiling fire dampers are designed for installation in false ceilings for self-contained fire protection, one of the requirements being "combustible load only on the room side" and the fire resistance class being EI 60. They provide effective protection against fire progression from the room into the false ceiling area. The integrated aluminium frame is equipped with a fire stop. The cover of the inspection hatch is fitted with a DF fire protection plate and protected against smoke entry by a versatile all-round seal. The cover is secured on both sides by automatic safety hooking arms. The safety catching arms ensure that the lid is intercepted every time the hatch is opened. The lid is easy to remove and replace.