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Thanks a lot for this tip. I would be curious to know if there is way to figure how many gore vents we should use. Or figure how many we need. I am sure there is a relation to volume. I will check their website or check their tech support. Thanks GC Thanks, GC

All, I am glad I shared my concern here. Thanks so much for sharing various ideas. Can't wait to try them. Thanks again GC Thanks, GC

Hi Guys, I have a cylindrical-shaped outdoor light fixture. Imagine sealed Dia 8in x 30in tall clear cylinder. light source at the top end. The fixture is sealed well and is water-resistant. Still, periodically, I observe a moisture patch on the inside closer to the bottom part of the...

Guys, I need some help with basic statics here. Please see the image attached. While calculating bending force due to loading how can I take advantage of the Style B over Style A. Since there are 2 welds holding in the style B, it should better design compared to style A. But, how can I alter...

May be its a combination of reasons for failure. Unfortunately I can't post the pictures because I don't own them all. I have asked for permission; hope to post them soon. Here is more information based on few comments here. Application is definitely a corrosive environment (by sea shore)...

Parts were welded with a 1/4 in fillet using GMAW method Yes, 4043 filler was used. Although the welded assembly is powder coated, but are installed by a sea shore. I can understand that there could be corrosion from the wind/mist from the sea, but could it influence more than the fact that...

Is it possible (recommended ?) to weld Aluminum Diecast (A360) & Aluminum Extrusion (6061 T6)? I tried to Google filler recommendation, couldn't find one for this combination. When tried welding with filler 4043, even tough joint looks good, we noticed severe corrosion & crack overtime. On the...

Not sure if this is a welding question. But I want to see if the material combination is correct. Is it possible (recommended ?) to weld Aluminum Diecast (A360) & Aluminum Extrusion (6061 T6)? Even tough joint looks good, we noticed severe corrosion overtime. On the first had I want to see if...

I agree gruntguru. Yes, I am doing this to meet a code's requirement. Load test 4 times the final product's weight for 1 hr and see if the lever arm sustain visible distortion and damages. Unfortunately, can't keep the cylinder pushing 400 lb-force constantly for an hour. compressed air...

Hi Guys, I have a aluminum cantilever arm that I want to load test for 400 lbs weight. Wanted to hang this weight on the end of the arm to see if this can take the load. Since I have difficulty with finding the needed weights. Can I instead use a cylinder that can push the end of the arm...

Guys, I need some help with understanding and using h/t ratio for calulating stresses. On another thread I had learned that h/t for pole refers to diameter to wall thickness. I tried to understand the following pole drawing calculation. Pole drawing : There are 2 segments of pole : Dia 8 x...

Thank you for helping me understand h/t. I tried applying this to a old calculation on file. Here is what I came up with. When you have a moment, can you see if I am doing this right, please. At this point, I am concerned only about h/t. There are 2 segments of pole : Dia 8 x 0.25" wall x...

Thanks a lot Archie. This is a very old calc on file (1996) that I am trying to breakdown. (Appears it's already broken LOL) From FP and FB calculation its is clear, that he is doing Projected Area X wind pressure X Drag Particularly in FB, like you, I can now see he is trying to take average...

Thanks a lot for explaining the in-kips conversion Archie.. Sounds like the base section modulus calculation is incorrect then. There for, I could quickly create a drawing of the base section near anchor bolts... Hope this helps ... Thanks, GC

Andriver, I apologize. Here is a marked up sketch that gives the details. I know that FP & FB are the Force calulation on Pole & Base. Generally I would think its AREA X WIND PRESSURE X Cd. I couldn't figure the where the 4' & 12'+6' came for inches conversion & why? Thanks, GC

All, I need help from you guys to recognize few steps from the below calculation for a lighting post. Unfortunately I have no drawing, but quite simple to visualize. I am clear that the [highlight #729FCF]blue color[/highlight] highlighted are need to be updated to current values. The gust...

Guys, I guess I should invlove the manufacturer to see if this was a know problem & a look solution for it. Thankyou very much for pitching in. GC Thanks, GC

Thanks s lot.

Hi Guys, Please help me identify the material I need to know the correct specification of the black colored metal. Planning to use this material for one of my sheet metal component. Thanks in advance.

They are either SPS models heating area of 250 ft x 300 ft. Similar as shown on their website. Link Not sure which window you are suggesting to open? We do have frequently opening shutters for receiving and receiving. The high pitch sound I am talking about alternates every approx 10min (10...