Anemometer Placement on Construction Sites

The placement of an anemometer on a construction site is a complex decision, as it depends on several factors, including crane type, nearby obstacles, and wind flow dynamics.

According to IEC 61400-12, based on vertical tubular or lattice meteorological masts, and the wind flow will likely be even more disrupted on a crane boom due to the boom angle and additional equipment.

Tower Cranes: A-Frame vs. Jib End

For a hammerhead tower crane, the difference between installing an anemometer at the A-frame or the jib end is usually minimal—as long as there are no surrounding buildings or machinery creating turbulence. In these cases, either position may be suitable.

Luffing Cranes: Why Jib-End Placement Is Preferred, or is it?

Luffing cranes present a different challenge since the jib operates at varying heights, often extending well above the A-frame. In some conditions, wind readings at the A-frame may still be higher than those at the jib end, depending on the wind direction and surrounding obstacles. This does not indicate a sensor malfunction but simply reflects variations in wind flow as the air swirls around the crane and nearby structures.

For luffing cranes, placing the anemometer at the jib end is generally recommended, as it better reflects the wind conditions affecting the load vertically. Additionally, the anemometer should be equipped with a pendulum mount to ensure it correctly measures the horizontal wind component, regardless of jib angle changes.

However, the anemometer on the A frame will be often closer to the height of the load than the jib end, something to consider too. 

Using Dual Sensors for Critical Wind Monitoring

In highly wind-sensitive operations, a dual-anemometer setup is sometimes used:

• One at the A-frame (for a stable reference reading).

• One at the jib end (to measure wind at the load level).

• The highest reading determines operational safety.

This method is sometimes used on crawler cranes, such as Liebherr LR models, where anemometers are placed at the top of the main boom and at the luffing/fly jib tip for a more comprehensive wind measurement.

Final Thoughts: A Site-Specific Approach

There is no single universal answer for anemometer placement—it depends on the crane type, site conditions, and wind exposure. The best approach is to assess each site individually to determine the most reliable position for wind monitoring.

If you require further advice or enabling your Windcrane unit for two anemometers, please get in touch.