Floor springs For invisible mounting of glass and heavy doors. Smooth-running with Cam-Motion® technology. Floor springs Invisible for the naked eye, floor springs are the ideal solution for glass as well as heavy doors. They respect the architect’s vision, yet they provide a smooth and safe door closing. Available for single as well as double and hinged as well as swing doors. ASSA ABLOY Floor Springs offer an enhanced durability with a frequency of use of at least 1 000 000 cycles. Floor springs DC477 DC475 DC450 DC420 Application Smooth-running floor spring for medium duty doors up to 1100mm Smooth-running floor spring for heavy duty doors up to 1400mm Smooth-running compact floor spring Smooth-running floor spring Technology Low opening resistance thanks to Close-Motion® technology, ideal solution for elderly people and children ✓ ✓ ✓ ✓ Measures and door specifications EN classification (closing force for fire and smoke protection doors, according to EN1154) 2-4 3-6 3/4 2/3/4 Door measures (mm) according to EN1154 850-1100 950-1400 950/1100 850/950/1100 Door mass (kg) according to EN1154 170 300 120 100 For inner | outer doors ✓ | ✓ ✓ | ✓ ✓ | ✓ ✓ | ✓ For hinged | swing doors ✓ | ✓ ✓ | ✓ ✓ | ✓ ✓ | ✓ Smoke protected | fire rated doors ✓ ✓ ✓ ✓ Certificates CE-certified ✓ ✓ ✓ ✓ EN1154 tested and certified ✓ ✓ ✓ ✓ Download product sheet