Calculating loads

[philginn]

I've been trying to work out the sideways load for the upper hinge pin on the door below, 

Probably an easy calculation but brains not working today,

Anyone help please?

Thanks' 

Phil..

[swalton]

If the door is in static equilibrium, the sum the moments of the known and unknown forces about the lower hinge will be zero.  Solve that equation for the unknown force.  If you know the door's CG, you can add in the moment load due to its weight too.

Here is an interesting guide to statics 101: http://www.fao.org/docrep/015/i2433e/i2433e03.pdf  Look at example 6.3. 

More Examples: http://www.ce.jhu.edu/lori/statics/hw02.pdf

Something like 0=1500mm*F-600mm*100kg. (can you spot my error?)  You should convert the kg (mass) into Newtons (force). 

When you do these calculations, make sure you use the perpendicular distance between the pivot point and the line-of-action of each force.  If not, you will need to resolve the forces and distances into x,y,z coordinates and then write and solve an equation for each direction.

[JDMather]

Is this a school assignment?

What is the area of the hing pin contact?

(Edit: Don't take this as answer.  I am in the middle of several distractions and don't have time to double check.)

Oops, discovered I made a mistake.

Removed image.

[philginn]

Hi,
I wish it was for school, I'd have an excuse.. I'll just have to blame my old age and the heat,

I'm looking at a door solution for a client and they have specified this load in part of the testing,
I have been trying to find out what sort of force/load would be on the top pivot which is just a 7.0 dia pin that locates into a bush mounted in the top of the door,


Regards
Phil...

[JDMather]

Check out http://forceeffect.autodesk.com