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Old 02-27-2013, 04:38 PM   #1
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Is it my Phillips screwdriver or its just me?


I'm having a very hard time screwing in a 2-inch long screw through my ceiling wood joist. I'm trying to hang a ceiling fan.

Looking at some do it yourself videos online, I'm surprised at how easy this woman is able to put the screw inside the joist.

I was wondering if my screw driver is worn out (don't know how to tell) or putting 2-in screw inside a joist is never easy.

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Old 02-27-2013, 05:30 PM   #2
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Is it my Phillips screwdriver or its just me?


Sure, your screwdriver bit can be worn and then it will slip out of the screw more easily. It might also be the wrong size bit for the screw. It is not easy to sink a 2" screw with a hand-screwdriver, though. Especially when you are standing on a ladder. An impact driver would make short work of it. A regular drill will still make it easier.

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Old 02-27-2013, 06:02 PM   #3
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Is it my Phillips screwdriver or its just me?


if your driving long screws that require torque,, dont use philips you need robertsons or grex
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Old 02-27-2013, 06:36 PM   #4
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Is it my Phillips screwdriver or its just me?


If memory serves me right driving a 2" screw by hand without pre drilling is not fun whice ever screwdriver you use.
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Old 02-27-2013, 06:43 PM   #5
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Is it my Phillips screwdriver or its just me?


Still trying to figure out exactly what it is your trying to do.
Why are you trying to use that long a screw?
I've never seen a 2" screw used when installing a ceiling fan.
More details would sure help.
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Old 02-27-2013, 08:18 PM   #6
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Is it my Phillips screwdriver or its just me?


that's an existing screw that i removed (dont know how they were able to screw it in. dont know why they used that long). i'm using the existing holes also but still cant get it in.

they used it for ceiling lights only but has pre-wire for ceiling fan in case i add one which what i'm doing.

i guess i wont try to screw back that long screw in. instead i'll buy a shorter screw, drill a new hole on the joist.

how long do you think is long enough for a standard living room ceiling fan and what size of screw?

Last edited by dumbengineer; 02-27-2013 at 08:21 PM.
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Old 02-27-2013, 08:24 PM   #7
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Is it my Phillips screwdriver or its just me?


I would pre-drill for a 2" screw. Tough going with out it.
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Old 02-27-2013, 08:49 PM   #8
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Is it my Phillips screwdriver or its just me?


after searching online i found i should use #10-32 screw. but coudnt find the length i need. is 1/2" length ok?
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Old 02-27-2013, 09:24 PM   #9
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Is it my Phillips screwdriver or its just me?


A slot head screw and screwdriver would work better. Phillips head screws are made to cam out so they're not tightened too much. And lubricate the threads with beeswax or a screw lubricant. And check that your screwdriver is the right size. It shouldn't fit too loosely but it should fit all the way into the head of the screw. If you drill a hole larger enough to easily drive the screw with the wrong screwdriver, it won't be strong enough.
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Old 02-27-2013, 09:30 PM   #10
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Is it my Phillips screwdriver or its just me?


#10-32 is a common machine screw but it is not what I would use for hanging an overhead load in a wooden beam, especially a vibrating, live load like a ceiling fan. It will eventually fall down. You need something with fewer threads-per-inch and ideally you should have a self-tapping wood screw.

Also, don't pre-tap a screw hole with a drill bit when hanging an overhead load if you aren't already pretty "handy." Don't want the fan to fall down on your family members or anything!
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Old 02-27-2013, 09:32 PM   #11
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Quote:
Originally Posted by dumbengineer View Post
after searching online i found i should use #10-32 screw. but coudnt find the length i need. is 1/2" length ok?
The equation I have for determining pullout strength requires a 3/4" length for a #10 screw.
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Old 02-27-2013, 09:35 PM   #12
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Is it my Phillips screwdriver or its just me?


a slotted screw is useless for trying to drive into wood. their for machine screws and electric switch plates.. you need robertsons to drive into wood
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Old 02-28-2013, 12:36 AM   #13
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Quote:
Originally Posted by Dorado View Post
The equation I have for determining pullout strength requires a 3/4" length for a #10 screw.
the existing screw is #12 x 2"L sheet metal screw.

I used #12 x 1-1/2"L sheet metal screw instead of machine screw.

formula based on wood handbook:
p = 15700 G^2 D L

i assume G as 0.3
D = 0.22in for #12 screw
L =1 inch penetration

p = 310 lbs... weight of ceiling fan is 35 lbs so even if i multiply weight by 3x for dynamic it still ok..

can someone correct this calculation if i'm wrong. i've never done wood calcs.

Last edited by dumbengineer; 02-28-2013 at 12:47 AM.
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Old 02-28-2013, 05:42 AM   #14
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Is it my Phillips screwdriver or its just me?


We've never done any either .

We just grab a screw and drive it in there.
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Old 02-28-2013, 07:42 AM   #15
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Quote:
Originally Posted by dumbengineer View Post
the existing screw is #12 x 2"L sheet metal screw.

I used #12 x 1-1/2"L sheet metal screw
I think that length works with the equation but I didn't check it. It's still a major screw and the wood is strong and I can't imagine a ceiling fan requiring anything more. But is the entire weight held with just that one screw through the wood? Is this a custom mount thing you're doing or is it made to be hung with just one screw? I never hung a ceiling fan but I hung a chandelier and I think it required several screws in the ceiling plus one bolt through a steel bracket.

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