Ameet,
The spring is designed to withstand such forces. These are designed (not off
the shelf standard springs) to be used on marine applications where wind and
movement of the boat both apply forces to the spring.  These come in various
sizes depending on the size of the hatch to be held open. I actually
installed an oversized one as a margin of safety. As a test after the
installation was done, I applied force to the open door, trying to get the
spring to collapse, to the point where the door hinges were beginning to
lift off the frame. I do not think any wind will apply the force which I
applied. These springs will not collapse unless you push on the center
causing it to bend. 

Mark Jones
Mueller Sales Corporation
Ph: 262-781-5310
Fax:262-781-4130
E-mail: [email protected] <mailto:[email protected]> 
Web: www.muellersales.com <http://www.muellersales.com> 


>ORIGINAL MESSAGE
>What would happen if the canopy door is open and a
>gust of wind hits it? Will it still hold? Considering
>the door is hinged (almost all doors are) the force
>acting on the spring while closing is not parallel to
>the axis of the spring. Chances are that the inward
>(towards the hinge) or outward (away from the hinge)
>component of the force exerted by the wind will push
>the spring in one of the directions and the door will
>fall. The question is how much wind force? It can be
>calculated by analyzing your setup, weight of the door
>etc...

>This is my opinion and just that. Am I missing
>something? (I must be.)

>Thanks
>Ameet

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