A Comprehensive Guide to SC Construction Hoists

The SC-type construction hoist is a gear-rack driven elevator primarily used for the vertical transportation of personnel and materials during high-rise building construction. This type of elevator is designed for easy installation, disassembly, and can be adjusted in height to accommodate the growing structure.

What is an SC Construction Hoist?

An SC construction hoist, also known simply as a construction hoist, is a specialized piece of equipment designed for the vertical transportation of personnel and materials on construction sites. The “SC” in its name stands for “gear-rack” and refers to its drive system. Primarily used in the construction of high-rise buildings, bridges, chimneys, and other structures, SC hoists are essential for both interior and exterior construction work. Their unique cage design provides a comfortable and safe working environment for construction personnel. SC hoists are typically classified into single-cage and double-cage types, with the latter being an extension of the former by adding an extra cage and related components.

Classification		Model	Capacity (kg)	Lifting speed	Motor power	Counter weight (kg)
Single cage	With counter weight	SCD200	2000	36	2 x 11	1000
		SCD270TD	2700	36	3 x 11	1000
		SCD320TD	3200	36	3 x 11	1200
	No counter weight	SCD100TD	1000	36	2 x 11	/
		SC120TD	1200	36	2 x 11	/
		SC200TD	2000	36	3 x 11	/
Twin cage	With counter weight	SCD200/200	2 x 2000	36	2x2x11	2×1000
		SCD270TD/270TD	2 x 2700	36	2x3x11	2×1000
		SCD320TD/320TD	2 x 3200	36	2x3x11	2×1200
	No counter weight	SCD100TD/100TD	2 x 1000	36	2x2x11	/
		SC120TD/120TD	2 x 1200	36	2x2x11	/
		SC200TD/200TD	2 x 2000	36	2x3x11	/

Components of an SC Construction Hoist

An SC construction hoist primarily consists of a base cage (outer cage), hoist cage, guide rail frame (standard section), attachment bracket, drive mechanism, safety anti-fall device, safety control system, cable system, counterweight system, and suspension beam. There are two main types: single-cage and double-cage hoists. A single-cage hoist can be converted into a double-cage hoist by adding an extra cage and other necessary components. Without a counterweight and assuming a constant motor power, adding a counterweight can increase the hoist’s load capacity by the weight of the counterweight.

Guide Rails

These are vertical tracks that guide the movement of the hoist cage. They are typically made of steel and are designed to withstand heavy loads and harsh weather conditions.

Drive Unit

The drive unit is the heart of the hoist, providing the power to lift and lower the cage. It typically consists of an electric motor, gearbox, and rack and pinion system. The motor drives the gearbox, which in turn drives the pinion gear, which engages with the rack to move the hoist cage.

Hoist Cage

This is the enclosed compartment that carries personnel and materials. It is designed to be sturdy and safe, with features like safety gates, emergency stop buttons, and fire-resistant materials.

Safety Devices

SC hoists are equipped with various safety devices to prevent accidents. These include:

1. Limit Switches: These prevent the hoist from overtraveling.
2. Overload Protection Devices: These prevent the hoist from being overloaded.
3. Emergency Stop Buttons: These allow operators to quickly stop the hoist in case of an emergency.
4. Safety Brakes: These engage automatically in case of power failure or other emergencies.

Electrical Control System

This system controls the operation of the hoist, including starting, stopping, and speed control. It also monitors various parameters, such as motor current and temperature, to ensure safe and efficient operation.

Attachment Mechanism

This mechanism secures the hoist to the building structure, ensuring stability and preventing accidents. It can be a simple clamp or a more complex system of brackets and bolts.

Base Frame

The base frame provides a stable foundation for the hoist and supports its weight. It is typically made of steel and is anchored to the ground.

Advantages of SC Construction Hoists

SC construction hoists are characterized by their stable performance, high reliability, flexible handling, and strong adaptability. They significantly improve work efficiency and reduce the labor intensity of construction workers.

• Improved Safety: SC hoists are equipped with multiple safety features to minimize accidents.
• Increased Efficiency: They can transport large loads quickly and efficiently, reducing construction time.
• Reduced Labor Costs: They can reduce the need for manual labor, saving time and money.
• Versatility: They can be adapted to various construction projects and site conditions.
• Environmental Benefits: They can reduce the carbon footprint of construction projects by minimizing the use of heavy machinery on the ground.

Precautions When Using SC Construction Hoists 

To ensure the safe and efficient operation of SC construction hoists, regular inspections and maintenance are crucial. Operators must be properly trained and adhere to all safety regulations. Overloading the hoist should be strictly avoided, and safety devices must be regularly checked to prevent accidents.

Regular Inspection and Maintenance of Fall Arrest Devices

Fall arrest devices are crucial safety components of construction hoists, designed to prevent cage falls. These devices should undergo a drop test every three months and a comprehensive inspection every two years. Regular inspections ensure their proper functioning and prevent potential safety hazards.

Integrity of Safety Switches

Safety switches such as perimeter gate limit switches and cage door limit switches are essential for operational safety. Any damage or failure of these safety switches can increase the risk of accidents. Therefore, regular inspection and maintenance to ensure their reliability are crucial.

Professional Training for Operators

Operators must undergo specialized training and pass examinations before operating the hoist. Unauthorized operation by untrained personnel is strictly prohibited to ensure standardized and safe operations.

Reliability of Electrical Grounding

The hoist must have a reliable electrical grounding system with a ground resistance of no more than 4 ohms. During thunderstorms, personnel should avoid the vicinity of the base to prevent electrical faults caused by lightning strikes.

Adaptability to Environmental Conditions

The hoist should operate within an ambient temperature range of -20°C to 40°C, and wind speed should not exceed 6 Beaufort. Operations should cease in adverse weather conditions such as thunderstorms and heavy fog to ensure equipment operates in suitable environments.

Daily Maintenance and Inspection

Daily maintenance and regular inspections are essential for ensuring the normal operation of the equipment. Inspections should cover critical components such as steel ropes, braking systems, and guide rails to ensure all parts are in good working condition.

Safety Education and Certification

All construction personnel must undergo safety briefings and hold valid certifications. This ensures that personnel understand the specific characteristics of the construction work and the safety operating procedures, reducing the occurrence of human errors.

Enhance Safety and Productivity with SC Hoists

By understanding the components, applications, and safety features of SC construction hoists, construction companies can improve safety, efficiency, and productivity on their projects. By investing in high-quality SC hoists and following best practices, construction professionals can ensure the success of their projects.

CPTC provides tailored solutions to meet your specific construction needs. Our diverse range of hoists, combined with our expert guidance, ensures you find the perfect fit for your project.