Swing width of a rain chain

Due to the structure of the rain chains, we recommend that the rain chain be installed at a certain distance from the building, as rainwater that flow down the chain may splash when exposed to wind and rain.

So how much does the rain chain swing in the wind?

This time, we limited our verification to wire spec types. Products to which the results can be applied are "Toh," "Ta-ke," "Tama," "Toh L," and "Tama L," all of which are wire specifications.

 The force applied at a wind speed of 40 m/s was calculated based on the following conditions.

Unit: N (Newton)

Test conditions

・ Concentrated load was applied to the center of the chain length.

・ The total length of the rain chain under test was 2,500 mm.

・ Wind force on each rain chain was calculated using a formula for the given conditions.

The results were as follows

Wire tension: 125 N (as a result of tightening the turnbuckle at 0.4 N・m)

Wire diameter: 2.5φ

The test results above are for a 2,500 mm rain chain, so if a 3m or 4m long rain chain is used, the amount of deflection would be….

 *Calculated for each length based on the concept that the amount of flexure is proportional to the length.

For installation of rain chains in areas where flexure is a concern, please refer to the above and consider the use of wire specification types as well.