However, the weight capacity of a 4 post hoist can vary depending on the model and manufacturer. It is important to check the specifications of the specific hoist to determine its weight capacity.

The maximum lifting height of a hoist depends on various factors such as the type of hoist, its load capacity, and the length of its lifting chain or cable.

A 2 post hoist has two vertical posts that support the weight of the vehicle, while a 4 post hoist has four posts that support the weight of the vehicle. A 2 post hoist is typically used for lifting vehicles for maintenance and repair work, while a 4 post hoist is typically used for storage and parking of vehicles. A 4 post hoist is also more stable and can lift heavier vehicles, while a 2 post hoist is more compact and easier to maneuver around.

The power source required for the hoist is not specified in the given information.

The time it takes to install a hoist can vary depending on the type of hoist, the location, and the complexity of the installation. It is best to consult with a professional installer or manufacturer for a more accurate estimate.

However, in general, hoists may have safety features such as overload protection, emergency stop buttons, limit switches, slack rope switches, and safety brakes. It is important to consult the manufacturer's instructions and guidelines for specific safety features and proper usage of the hoist.

Locking mechanisms: The hoist should have locking mechanisms that keep the vehicle in place while it is lifted. These can be mechanical or hydraulic locks.
Safety latches: The hoist should have safety latches that prevent the lift from lowering in case of a failure in the locking mechanism.
Overload protection: The hoist should have overload protection that prevents it from lifting more weight than it is designed to handle.
Emergency stop button: The hoist should have an emergency stop button that can be used to quickly stop the lift in case of an emergency.
Non-skid surface: The hoist should have a non-skid surface that prevents the vehicle from slipping off the lift.
Certification: The hoist should be certified by a reputable organization such as the Automotive Lift Institute (ALI) to ensure that it meets safety standards.

However, in general, it depends on the weight capacity and design of the hoist. Some hoists are designed specifically for cars, while others can handle both cars and trucks. It is important to check the weight capacity and compatibility of the hoist before using it for any vehicle.

However, the cost of a 4 post hoist can vary depending on the brand, size, and features. Generally, they can range from a few thousand dollars to tens of thousands of dollars. It's best to do research and compare prices from different suppliers to find the best deal.

However, in general, there are often additional accessories and options available for hoists, such as different types of hooks, slings, and chains, as well as remote controls, limit switches, and safety features. It is best to check with the manufacturer or supplier for specific options and accessories for a particular hoist.