Rain affects lifting operations in several ways at once: surfaces become slippery, ground softens, standing water collects and visibility drops. Each of these can change whether a lift remains safe to carry out, which is why wet-weather lifting needs to be considered as part of the lift plan rather than dealt with on the day.
For glazing projects, the impact can be immediate. Equipment such as glass vacuum lifters relies on a clean, dry surface when the vacuum is first applied. Rain can therefore delay initial attachment, while the equipment’s IP rating and manufacturer guidance determine whether a securely attached load can then be transported through wet conditions. Whether you are working with mini cranes, glazing equipment or tracked machinery, weather conditions should form part of the lift planning process from the outset.
Under the Lifting Operations and Lifting Equipment Regulations 1998 (LOLER), lifting operations must be properly planned by a competent person, appropriately supervised and carried out in a safe manner. Weather, ground conditions, equipment stability and access can all affect whether the original lift plan remains suitable.
Can You Use a Glass Vacuum Lifter in the Rain?
The vacuum pads and glass surface must be clean and dry when the vacuum is first applied. Glass vacuum lifters with a suitable IP rating may then be capable of transporting a securely attached load in wet conditions, but only where the manufacturer specifically permits it.
Water between the vacuum pad and the glass can reduce grip and increase the risk of the load slipping, so a wet surface should not be used for the initial vacuum attachment. Moisture, grit and dirt can also affect vacuum equipment and its components. The operating limits of the individual lifter, including its protection against water ingress, should always be checked before work begins.
Why the IP Rating Matters
An IP (Ingress Protection) rating indicates the level of protection provided against the ingress of solids and water. For wet-weather lifting, this can make an important practical difference. A vacuum lifter with a suitable IP rating may be able to pick up a load on a clean, dry surface and then transport that secured load through rain to the installation point. The IP rating does not remove the requirement for a dry attachment surface, and it should never be treated as a blanket approval for use in rain. The manufacturer’s instructions for the specific lifter determine what wet-weather exposure is permitted.
If rain begins before the vacuum has been applied, protect the equipment and the load and wait until the attachment surfaces are clean and dry. If rain begins after the load has been securely attached, whether the operation can continue depends on the lifter’s IP rating and the manufacturer’s operating instructions. Before continuing or restarting:
- Make sure the vacuum pads are applied only to a clean, dry load surface.
- Check the vacuum pads for moisture, dirt or contamination before making a new attachment.
- Check the lifter’s IP rating and confirm whether the manufacturer permits the intended exposure to rain.
- Inspect the lifter for signs of damage or water ingress outside the level of protection specified for the equipment.
- Complete the required pre-use checks and follow the operating instructions for the specific lifter.
After a weather delay or wet-weather exposure, check the equipment and site conditions before the next lift or vacuum attachment. Where a lifter has been used in rain within its permitted IP-rated operating conditions, follow the manufacturer’s checks before making the next attachment.
Using Glazing Robots in Wet Weather
Wet weather also affects the use of glazing robots. These machines are designed to transport, position and install glass, often in restricted-access areas where controlled movement and accuracy are essential. Where a robot uses vacuum pads to handle the glass, the pads and load surface must be clean and dry when the vacuum is first applied. After a secure attachment has been made, whether the load can be transported in rain depends on the IP rating and operating guidance for the robot and its vacuum lifting system.
The condition of the ground or floor around the machine is equally important. A route that was suitable earlier in the day can quickly become slippery or muddy once rain starts. Standing water can conceal uneven surfaces, while mud on wheels or tracks can reduce traction. Before moving a glazing robot in wet weather, check the following.
Ground Conditions
Confirm that the planned route is still suitable and check for standing water, mud or slippery surfaces.
Stability
The area where the robot will lift and position the glass must remain suitable for both the machine and the load.
Visibility
Rain on glazing and surrounding surfaces can make it more difficult for operators and banksmen to judge clearances accurately.
Vacuum Equipment
A glazing robot may be capable of operating in wet conditions, and suitably IP-rated vacuum equipment may also permit a securely attached load to be transported through rain. However, wet glass should not be used as the initial vacuum attachment surface. Always confirm the IP rating and operating limitations of the specific machine and vacuum system being used.
Can Cranes Operate in the Rain?
Rain does not automatically mean a crane lift must stop, but it can change the conditions the lift was planned around. Ground stability is the main concern: heavy or prolonged rain can soften the ground beneath a crane and weaken the area supporting its tracks, wheels or outriggers.
For UNIC mini spider cranes, correct outrigger positioning and suitable ground support are essential to maintaining stability. GGR Group also supplies outrigger mats and tracking mats for suitable applications, helping to spread loads across softer ground.
Tracked cranes may be better suited to some difficult access conditions, but tracks do not remove the need to assess the ground. Mud, slopes, standing water and soft ground can still affect traction and positioning. For particularly restricted sites or uneven terrain, GGR Group also offers a range of mini crawler cranes designed for compact access and demanding lifting applications.
Factor in Wind as Well as Rain
Rain is often only one part of poor weather. Wind can have a significant effect on lifting operations, particularly when handling materials with a large surface area such as glass, façade panels and cladding. A large glazing panel can quickly become difficult to control once exposed to wind, especially at height.
Weather should therefore be monitored throughout the lift, not checked only at the start of the day. Equipment-specific wind limits must also be followed; individual vacuum lifters, for example, may have defined maximum wind speeds for safe use.
Check Access Routes Before Moving Lifting Equipment
Wet-weather problems can start before the lifting operation even begins. Rain can quickly turn access routes muddy or slippery, making it more difficult to move cranes, glazing equipment and other machinery into position. Before travelling across site, check:
- Tracking or driving routes
- Gradients and ramps
- Ground around the lifting area
- Standing water and drainage
- Mud transferred onto internal floors
- Pedestrian routes
- Lighting and visibility
Routes should always be assessed in their current condition rather than relying on how they looked when the lift was first planned. For moving materials across rough or restricted terrain, tracked carriers can provide greater traction and weight distribution than conventional wheeled equipment, although the ground must still be suitable for the specific machine and load.
Protect Battery and Electrical Equipment
Modern lifting equipment increasingly relies on batteries, electric motors, electronic controls, sensors and remote-control systems. That does not mean every machine has the same level of protection from rain. Check the equipment’s IP rating and the manufacturer’s instructions before working in wet conditions, as the level of protection against water ingress varies between machines and components. Particular attention should be paid to:
- Electrical connections
- Control panels
- Batteries
- Chargers
- Remote-control equipment
Vacuum lifters require particular care. Models without suitable ingress protection should be protected from rain. Where a vacuum lifter has an appropriate IP rating and is approved by the manufacturer for wet-weather exposure, that rating determines the level of water protection provided. This does not change the requirement to make the initial vacuum attachment to a clean, dry load surface.
Check Equipment Again After Heavy Rain
Wet weather can continue to cause problems after the rain has stopped. Before restarting work or making a new vacuum attachment, inspect the equipment for damage, contamination or water ingress beyond its specified protection, and make sure the vacuum pads and attachment surface are clean and dry.
Ground conditions should also be reassessed, particularly around cranes and outrigger positions, as access routes may have become softer, muddier or more difficult to navigate even if the weather has improved. If conditions have changed significantly from those set out in the original lift plan, the lifting operation should be reviewed before work continues.
Know When to Stop a Lift
Sometimes the safest decision is to stop. Construction schedules are tight and weather delays can be frustrating, especially when operators, lifting equipment and installation teams are already on site. However, continuing after site conditions have changed can introduce unnecessary risk. If there are concerns about the equipment, load, ground, access, visibility, wind or rain, the lifting operation should be reassessed before it continues.
There is no single wet-weather rule that applies to every crane or lifting machine. The right decision depends on:
- The equipment being used
- Manufacturer guidance
- The load
- Ground conditions
- The lift plan
- Current weather conditions
For vacuum lifting equipment, one rule remains consistent: the vacuum pads must be applied to a clean, dry load surface. After a secure attachment has been made, whether the load can be transported in rain depends on the lifter’s IP rating and the manufacturer’s guidance for that specific model.
Choosing the Right Equipment for Wet and Difficult Site Conditions
Effective wet-weather lifting starts with planning that takes changing weather and ground conditions into account. The right equipment will depend on the load, access, ground conditions, working radius and type of installation. GGR Group offers a wide range of specialist lifting equipment, including:
For more complex lifting projects, GGR Group can also provide a fully planned contract lift, including site surveys, lift planning, risk assessments and qualified lifting personnel.
Planning a lift in challenging site conditions? Contact GGR Group to discuss the most suitable equipment and lifting method for your project.
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