Single vs Double Cylinder Floor Spring — Which is Right for Your Project?
Specifying a floor spring for a commercial glass door project requires one primary decision: single cylinder or double cylinder. This guide breaks down the technical differences, weight capacities, application scenarios, and cost implications so dealers, fabricators, and project specifiers can make the right call every time. WhatsApp our technical team: +91-9855225874
Quick Verdict — At a Glance
| Feature | Single Cylinder | Double Cylinder |
|---|---|---|
| Weight capacity | Up to 90kg | 120kg to 200kg |
| Closing action | Spring return only | Spring + hydraulic control |
| Door closing speed | Fixed | Adjustable |
| Typical application | Light-medium commercial | Standard to heavy commercial |
| Typical models | TCH-7400 | TCH-8400, TCH-9400, TCH-10400 |
| Tickr 7-year guarantee | Yes | Yes |
Understanding Floor Spring Cylinders
A floor spring is a pivot mechanism embedded in the floor at the base of a frameless glass door. When the door opens, the spring mechanism stores energy and controls the return to the closed position. The number of cylinders determines how that control works:
Single cylinder floor springs use a coil spring as the primary force element. When the door is pushed open, the spring compresses. When released, the spring drives the door closed. Closing speed is determined by the spring tension — it is fixed and cannot be independently adjusted after installation. This makes single cylinder springs simpler to install and maintain, but less flexible in environments where controlled closing speed is a project requirement.
Double cylinder floor springs combine a coil spring with a hydraulic cylinder. The spring provides the closing force; the hydraulic cylinder regulates closing speed independently. This means the door can be set to close quickly, slowly, or with a controlled latching deceleration — adjustable via an external screw on the unit. Double cylinder springs cost more but deliver superior control and are required by building codes in many project categories (hospitals, fire-rated doors, accessible entry points).
Weight Capacity — The Primary Specification Decision
Weight capacity is the single most important specification for floor spring selection. Using an undersized floor spring leads to premature wear, seal failure, and warranty disputes. Using an oversized spring on a lightweight door affects closing feel and can cause door slam.
How to calculate door weight for specification purposes:
- Glass area — multiply door height (metres) × door width (metres) to get area in m²
- Glass weight per m² — 10mm tempered glass weighs approximately 25kg/m²; 12mm weighs approximately 30kg/m²; 15mm weighs approximately 37.5kg/m²
- Total glass weight — area × weight per m²
- Add frame weight — if the door has a stainless steel or aluminium top rail and lock rail, add 10–15% to the glass weight
- Apply safety factor — select a floor spring rated for at least 20% above calculated door weight to account for long-term wear
Example: A 1m × 2.1m glass door in 12mm tempered glass weighs approximately 63kg (1 × 2.1 × 30). With a 20% safety factor, specify a floor spring rated for at least 75kg — meaning the TCH-7400 (90kg) is the minimum appropriate specification for this door.
Tickr Single Cylinder Floor Spring — TCH-7400
The Tickr TCH-7400 is Tickr’s single cylinder floor spring, rated for doors up to 90kg. It is suited for:
- Internal office glass partitions
- Retail showroom entry doors (medium traffic)
- Small hotel meeting room glass doors
- Residential glass door applications
- Light commercial applications where door weight is below 75kg
The TCH-7400 is available in Stainless Steel, Black, Gold, and Rose Gold finishes. It carries Tickr’s 7-year guarantee and TUV-SUD quality certification. Endurance tested to 5,00,000 cycles. Manufactured since 2012 at Multani Dhanda, Paharganj, New Delhi.
Tickr Double Cylinder Floor Springs — TCH-8400, TCH-9400, TCH-10400
Tickr’s double cylinder range covers three weight bands:
TCH-8400 — 120kg: The most commonly specified floor spring in Tickr’s range. Standard commercial workhorse for lobby glass doors, restaurant glass entries, corporate office main entrances, and hotel room glass barriers. Double cylinder with independently adjustable closing speed. 4 finish options. 7-year guarantee. TUV-SUD certified.
TCH-9400 — 150kg: Specified for heavy commercial applications — large hotel lobby glass doors, institutional entrances, high-traffic retail formats, and hospitality projects where door weight or door size exceeds what TCH-8400 can reliably support over a multi-year lifecycle. 4 finish options. 7-year guarantee.
TCH-10400 — 200kg maximum capacity: Tickr’s highest-rated floor spring. Specified for the heaviest frameless glass doors — convention centre entrances, premium showroom statement doors, large hospital glass entries, and any installation where door weight exceeds 150kg. 7-year guarantee. TUV-SUD certified. Available in all 4 finishes.
When to Specify Single vs Double — Decision Framework
Specify single cylinder (TCH-7400) when:
- Door weight is under 75kg (with 20% safety factor applied)
- Closing speed control is not a project requirement
- Budget is constrained and door usage frequency is moderate
- The application is internal (not a main exterior entrance)
Specify double cylinder (TCH-8400 / TCH-9400 / TCH-10400) when:
- Door weight exceeds 90kg
- Controlled closing speed is required (hospitality standard, accessibility compliance, fire door protocol)
- The door is a high-traffic exterior entrance with daily cycle volume exceeding 200 open/close cycles
- The project has an architect or consultant specification that calls for adjustable closers
- Premium finish and long-term serviceability are priorities
Common Specifier Mistakes to Avoid
Under-specifying capacity — selecting a floor spring at the edge of its rated capacity without applying a safety factor. A 90kg door paired with a 90kg-rated spring will show wear within 2–3 years in high-traffic environments.
Ignoring cycle frequency — a hotel lobby door that opens 500+ times per day needs a heavier-rated double cylinder spring even if the door itself is within the technical weight limit of a lighter model. The cycle endurance (5,00,000 cycles is Tickr’s tested minimum) is the durability benchmark, not just weight capacity.
Mixing finish specifications mid-project — if you specify Gold finish for door 1, ensure the same finish is available across all doors on the same elevation. Tickr’s 4-finish range covers all standard architectural palettes, but confirm finish availability before finalising the specification.
Dealer Pricing and Technical Consultation
Tickr Overseas supplies floor springs B2B — to hardware dealers, glazing fabricators, and project contractors across India. Manufactured in New Delhi since 2012. Pricing is approximately 15% below Ozone, 25% below Dorma. 7-year guarantee on all models. TUV-SUD certified.
For technical specification help, dealer pricing, or project quantities: WhatsApp +91-9855225874 or sales@tickrindia.com. Become a Tickr dealer here.