Dorma BTS80 Size 4 Floor Spring

These Dorma BTS80 Floor Springs have a fixed strength size 4 and can be used on a single or double action door when fitted in conjunction with correct accessory pack.

These floor springs can be used on doors with a maximum weight of 300kg and a maximum width of 1100mm, are tested to BS EN1154 and are CE Marked.

Features include hold open, back check, delayed action, adjustable closing speed and adjustable latch action - See FAQs for more information on how these functions work.

• Fitting: Concealed - Fitted into the floor.
• Tested to BS EN1154.
• Height: 60mm
• Width: 78mm
• Length: 341mm
• Maximum Door Weight: 300kg
• Maximum Door Width - 1100mm
• Strength: Fixed Size 4
• Spindle: Yes - BTS80EN4 - 15mm(not including 3mm collar) 
• Spindle: No - BTS80F
• Adjustable Closing Speed: Yes.
• Adjustable Latch Action: Yes.
• Delayed Action: Yes.
• Backcheck: Yes.
• Hold open - Any angle between 75 and 175 degrees. (hold open variants not suitable for use on Fire Doors)
• The angle at which the hold open begins can be adjusted between 75 and 105 degrees.
• CE Marked.
• Non Handed.