Commercial floor spring doors, also known as pivot-hung glass doors or swing doors, are one of the most common and classic door types in modern commercial architecture like shopping malls, office buildings, hotels, banks, retail stores etc.. They are widely popular for their transparency, aesthetics, durability, and efficient traffic flow.
General Structure
The core feature of a floor spring door is that its pivot (rotation axis) and load-bearing structure are entirely concealed within the floor and door frame, achieving a clean, unobstructed visual effect.
▪ Door Frame. Usually made of high-strength aluminum alloy or stainless steel, used to fix and install the pivot points, positioning devices, and door locks.
▪ Door Glass . Typically made of tempered glass, which can be single-pane, double-pane, or laminated to provide safety and acoustic insulation. Glass thickness is generally 12-19mm.
▪ Floor Spring (Concealed Door Closer). This is the core power and load-bearing component of the entire door, buried underground. It is responsible for supporting the entire weight of the door leaf and providing automatic, smooth closing function, including adjustable closing speed and latching force.
▪ Glass Clamps (Door Clips). Specialized metal fittings are used to secure and connect the glass door leaf. These mainly include: 1. Top Pivot Clamp (Overhead Clamp).Fixed to the top of the door leaf, connected to the top pivot, and often integrated with the door handle. 2. Bottom Pivot Clamp (Floor Clamp). Fixed to the bottom of the door leaf, connected to the floor spring’s pivot point .
▪ Door Handle. Usually integrated with the top clamp. Materials can be aluminum alloy, stainless steel, or brass. Styles are diverse, such as pull handles, cup handles, square handles.
▪ Door Locks. The mechanical locks are widely used for the floor spring door, such as multi-point locks (locked by top and bottom bolts), offering high security.
Comparison with Revolving Door
Summary
Commercial floor spring doors are a door type that offers an excellent balance of cost, space utilization, traffic efficiency, and versatility. Their advantages include:
▪ Simple structure and transparent, aesthetically pleasing visuals.
▪ Relatively low initial investment and maintenance costs.
▪ No requirement for lateral space, making them friendly to architectural layouts.
▪ High traffic efficiency, particularly beneficial for emergency egress and accessibility.
▪ Robust construction, strong wind resistance, and high durability.