746 N. Coney Ave.
Azusa, California
Phone 626-334-9304
Fax 626-969-3404

Inwesco Incorporated

2727 Premier St.
Fort Worth, Texas
Phone 817-834-3310
Fax 817-834-3315

More Robust Overhead Hardware System Designs Reduce Seismic and Wind Damage

Utility Companies are paying out millions of dollars for destruction caused by high winds and  earthquakes. Have you ever wondered how many of these losses are preventable by better structural design?

Let's look at field data from Southern California Edison.

A lineman identified a problem pertaining to the common transformer cluster bracket. Below are 4 pictures to illustrate a problem with excessive stress on utilities poles caused by design inadequacies in existing transformer cluster brackets.

Lineman taking Pictures from a bucket reported gaps between the top of the heavy framing member and the pole of approximately 1/2".

Lineman taking Pictures from a bucket reported the normal 1/2" gap between the bottom bolt and the top of the slot in the frame has closed and the bottom of the bracket has gouged into the pole approximately 3/8 to 1/2".

Existing Heavy Transformer Bracket Design - Splitting of the Pole was observed Potentially related to overstressing of the bolts.

Existing Heavy Transformer Bracket Design - Perspective of areas of stress described in previous slides. The photo has been  rotated from vertical to horizontal for easier viewing.

Transformer platforms can be designed to better withstand wind loads and seismic loads and better protect your investment in transformers. Working with Southern California Edison, Inwesco has helped redesign a platform to better withstand wind and seismic loads. The two pictures below contrast the design differences. 

Current Platform Design

New Platform Design

Inwesco Provides Design and Fabrication Support for New Products to
 Withstand Seismic Loading and Wind Loads for Overhead Hardware systems

Working together, Southern California Edison and Inwesco have created a solution. Inwesco has designed, engineered, and is currently manufacturing a new transformer cluster bracket engineered to withstand high winds and seismic activity.

The bolting pattern has been updated by adding more bolts to crucial contact points as well as adding stabilizing arms that can adjust to the size of the pole and keep the bracket from side to side movement during high winds or rocking during seismic activity.

Lets Look at these products more closely

How can we help you? 

You can find us easily. Offices in Texas and California help us offer services throughout the United States.

For more information on our fabrication services or to order please contact
Jeremy Acheson in California at j.acheson@inwesco.com - (626) 334-9304 or
Randy Eaton in our Texas facility at r.eaton@inwesco.com or call (817) 834-3310


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