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Magnet gate closure?

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Forum topic by AKAndrew posted 05-10-2011 12:14 AM 4797 views 1 time favorited 4 replies Add to Favorites Watch
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AKAndrew

53 posts in 2243 days


05-10-2011 12:14 AM

Topic tags/keywords: fence post latch magnet question cedar

I am building a cedar fence. I’ve looked at many, many gate latches and they all seem cheap and ugly. So, what do you guys think about using a magnet. Hollow out the gate and post, stick in a 150Lb? pull magnet and cover it with a thin slice of cedar. I know what you thinking- the gate would have to be pretty close to the post, but I think a strong magnet could make up for distance. What do you think?


4 replies so far

View Steve Peterson's profile

Steve Peterson

325 posts in 2550 days


#1 posted 05-10-2011 01:45 AM

You could try it, but I suspect that any magnet strong enough to overcome the wind or a dog jumping into the gate will also require you to body slam into it when you want to open it.

A typical gate latch uses gravity or a spring to create a positive stop. In the closed position, it may be able to withstand 1000 pounds of force. Apply a few ounces of presure to release the latch and the gate swings freely.

One magnetic option that might be possible is a magswitch to hold the gate closed when you want it closed and will allow the gate to open with minimal force when desired. I think it would require metal to metal contact to be strong enough.

-- Steve

View MrsN's profile

MrsN

975 posts in 2994 days


#2 posted 05-11-2011 10:55 PM

How do you open the gate that is held closed by a powerful magnet?

They make these for interior things
http://www.rockler.com/product.cfm?page=1611&filter=magnetic%20lock
Do they make an outside version? and how would you keep the wrong magnet from opening the lock?

-- ----- www.KNWoodworking.com ----- --

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MrWoodworker

65 posts in 2063 days


#3 posted 05-13-2011 05:42 PM

Unless you use an electromagnetic setup (switchable on and off) I don’t think it will be satisfactory. Let’s say you do find the right combination of holding power and open-ability, what happens to the equation when the post shift a bit and the magnets don’t line up right or they are suddenly trying to hold more weight than originally planned and the gate flops open constantly?

I think you’re asking for a pain in the neck. Gate latches aren’t ALL ugly are they? Seems like you could device a hidden latch of some sort.

-- http://nationalwoodworking.com

View Bertha's profile

Bertha

13003 posts in 2161 days


#4 posted 05-13-2011 05:52 PM

An extremely talented LJ just employed a magnetic latch in a hidden door. I’m lousy with the search feature but i’m sure someone can find it for you. His looked robust. I bought a simple gate closure device from Lowe’s to close my main cattlegate. It was $300 or so but you’ll need a welder. It works fine and doesn’t budge.

-- My dad and I built a 65 chev pick up.I killed trannys in that thing for some reason-Hog

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