Pole building construction pictures

[Diamondpilot]

Trust me, once you get the roof on the purlins they are not going to twist. I am not saying the metal plate is not a good idea but not need in most cases. They do make a good hurricane strap like mentioned.

Chris

 

[Danno1]

smfcpacfp:



I thought this was interesting: According to R. Bruce Hoadley, "Understanding Wood", load bearing capacity of a beam will vary directly as the square of the depth. In other words, if you double the depth, it will carry four times as much weight.

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I've heard the name of that book before but never read it.

However, check any mechanical or structural engineering text and it will tell you that the moment of inertia (second moment) of a beam is directly proportional to the cube of it's depth. This property (MOI) is used in the study of strength of beams, columns, and torsion bars among other things.

I=(1/12)bh^3 (for a rectangular beam)


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[jcaron2]

I've heard the name of that book before but never read it.

However, check any mechanical or structural engineering text and it will tell you that the moment of inertia (second moment) of a beam is directly proportional to the cube of it's depth. This property (MOI) is used in the study of strength of beams, columns, and torsion bars among other things.

I=(1/12)bh^3 (for a rectangular beam)


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Danno's right. If you change only the depth of a beam, the MOI will increase by the ratio cubed. I think the confusion relates to flipping a beam onto its side (thus decreasing the width, b, at the same time as increasing the depth, h). Since h goes up at the same time that b goes down, the net change is the ratio squared. Thus a true 2x4 will be 4 times as strong standing on its side than it is lying on the flat, and a 2x6 will be 9 times stronger on its side than on the flat. On the other hand, a true 2x12 standing on its side will be 27 times as strong as a true 2x4 standing on its side (3^3 = 27).

 

[Diamondpilot]

Another though on the purlins being on the side or standing up. Think of any floor joist. They are fairly weak by themselves. Once the sub floor is on they do not rack. Once everything is tied together its plenty strong.

Chris

 

[smfcpacfp]

Another though on the purlins being on the side or standing up. Think of any floor joist. They are fairly weak by themselves. Once the sub floor is on they do not rack. Once everything is tied together its plenty strong.

Chris

That is good point for those who thought it seemed wierd to put the purlins "sideway" It would seem equally wierd to see the floor joists laying flat.

On another matter my wife and I have installed the conduit from the power pole to the building. It was more fun to do than dig the trench. Every power company has their idiosyncrasies, undoubtably. The first 10' of conduit up the power pole must be steel pipe with 6" standoffs. The rest of the conduit can be PVC, which is exactly what I did. When they come out to hook up the power, they will assemble the rest of the conduit on the pole for you, so long as you have all of the parts laying on the ground near the pole.

Tomorrow my electrician friend (I do his income taxes and he does my electical stuff) is going to come out and do the wiring (with my help). Since the building is completely empty, we should make a pretty good stab at getting it mostly done. The weather gods are apparently shining on us because it should be sunny and get up to 50F. Normally now the high is only 35F. On Monday I am going to see if I can get gravel delivered because next Tuesday the weather is supposed to switch to normal (snowy with the high around 30).

 

[smfcpacfp]

In late November I had 110 tons of a gravel, sand, clay mixture brought in which my wife graded out. The day after that occurred it got very cold, and the gravel mixture froze and was followed by snow. The driveway wasn't perfect, but it was passable.

Anyway the picture below was taken January 5, 2010 after 100 hours of continuous snow. This is as deep as the snow has gotten on the roof, so it looks like, so far, the snow isn't going to be the issue I thought it might be:

 

[southernWi]

Great posting, thanks for sharing! Looks like you got a great building.

 

[smfcpacfp]

About a week ago I started phase 2 of my pole building which was to build a workshop in 1/4 of the building. The photo below was the picture immediately after the concrete work was finished last fall with the workshop to be built in the section with the two windows:

 

[smfcpacfp]

As you can see above, I had a few interior posts installed which turned out to be a mistake, minor mistake. They were to be used for the workshop. At the last minute Clearly proposed that they could just put in regular partition walls for an additional cost but I just didn't want to modify my contract with them again, I said let's go with what we agreed upon.

So anyway my son and I put in regular partition walls between the studs walls 2 feet on center where possible. I decided to go with a metal ceiling for some reason (lighter possibly) and put R-30 insulation in the ceiling as I put the ceiling up. As you can see, I rented a scissor lift:

 

[EddieWalker]

I think the metal ceiling is a brilliant idea. I've thought about doing the same thing, but just cant commit to any of my ideas on insulationg my ceiling just yet. How will you access the attic space above the metal? Are you running your electrical first? or just wait until the metal is in place and do it before blowing in the insulation. Are you using blown in insulation?

Eddie