Crane operation on construction sites is limited to certain wind conditions. Understanding, recording and acting when wind speeds reach their high wind speed limit is essential.
Richard Paul Russell Ltd has developed specific wind systems for crane use. The systems utilise a Gill ultrasonic sensor mounted high on the crane jib / boom, this is then linked to a WS-15A display in the cab that has high and low alarm settings ensuring an audible or visual alarm is activated when the wind speed reaches the maximum allowed.
The wind data is recorded using the SpaceLogger W10 or SpaceLogger W8 Wireless data loggers providing date and time stamped data for operator records. In the case of the SpaceLogger W8 Wireless data logger, wind speed and direction can be relayed directly to a site office PC and viewed live using our Weather File website.
RPR Ltd supplies wind systems designed to alert crane operators and site managers to excessive wind speeds, ensuring site safety.
• Measure wind speed and direction at crane jib / boom elevation
• Crane operator has wind speed display in cab with high wind speed warning
• Site office has overview of wind conditions with the ability to log data for Health & Safety and down-time records
RPR Ltd crane system meets the advice from the Construction Plant-hire Association's Tower Crane Interest Group:
It is essential that tower cranes are fitted with anemometers or other wind-speed monitoring devices. These should have their indicators located in clear view of the tower crane operator.
The correct operation of these devices should be determined regularly and they should be maintained in good working order. The sensor of the indicator should be positioned so that it can measure air flow uninterrupted by the tower crane or adjacent structures. Sensors are often positioned on the highest point of the tower crane.
In cases where a number of wind-speed monitoring devices are located on a site, the device fitted on a specific crane must be used for assessing the wind effect on that crane. Devices located on other parts of the site will not give an accurate wind-speed for that crane."
|Tower Crane Technical Information Note TIN 020 The Effect of Wind on Tower Cranes In Service (PDF)|
|Using a high quality ultrasonic sensor results in a robust, maintenance free, highly accurate solution that requires minimal maintenance and servicing, unlike traditional cup and vane sensors which rely upon bearings and are inherently fragile.|
|Tower Crane and Construction Site Wind System Brochure (PDF)|