In real-world applications, it is crucial to consider both fire safety and cost-effectiveness. Unfortunately, the fire protection design of high-rise buildings sometimes falls short of regulatory standards, creating potential safety risks. Due to the numerous fire hazards present in such structures, fires can spread quickly, making evacuation and rescue efforts extremely challenging. Given these characteristics, there are generally four key aspects to focus on in fire protection design.
First, ensuring that the main structural components have sufficient fire resistance is essential. Most high-rise buildings today use steel structures, which offer good integrity and stability but have poor fire resistance. Unprotected steel typically has a fire resistance limit of only about 15 minutes. As temperatures rise, the tensile strength and load-bearing capacity of steel decrease rapidly. At around 450–650°C, the structure may lose its load-bearing ability, leading to deformation and failure of steel columns and beams.
To address this, materials like high-performance fireproof boards or flame-retardant panels can be used as external cladding or interior decorative elements, offering additional fire protection. These materials help delay the spread of fire and protect the structural integrity for a longer period.
Second, enhancing self-rescue measures is critical. Fire department ladders usually cannot reach more than 100 meters, so in the case of very tall buildings, external rescue is often not feasible. Therefore, high-rise buildings must rely heavily on internal fire protection systems. Current self-rescue measures are generally divided into active and passive categories.
Active measures include technologies that directly control or prevent fires, such as early detection and alarm systems, automatic sprinkler systems, and smoke management techniques. Passive measures involve improving building components and materials to better withstand fire damage, such as using fire-resistant coatings or enhanced insulation.
These comprehensive self-rescue strategies are often more effective than relying solely on firefighters during sudden fire incidents. By combining both active and passive fire protection methods, high-rise buildings can significantly improve their overall safety and resilience against fire threats.
Escalator Traction Machine
Specifications
energy-saving, less maintenance, low noise
Suit for all kinds of machine room above lift/elevator
Gearless Traction Elevator for Escalator Machine
Product Characteristics
Drive: VVVF drive
Deadweight: 320kg/430kg
Noise level:<58dB(A)
Torsional vibrations: <0.8~1.2mm/s ;<2.0mm/s
Horizontal and vertical vibrations: <0.8~1.2mm/s
Rated output torque: 886N·m~1463N·m; 1072N·m~2925N·m
Arrangement: right side
Escalator Geared Traction Machine, Traction Machine for Lift and Escalator, Gearless Traction Elevator for Escalator Machine
Ningbo Xinda Elevator Traction Technology Co., Ltd. , https://www.xinda-elevator.com