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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...

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...

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...

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...

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.

Not sure if this would be the place to ask. But its related to unbearable noise. We have a Shop/Warehouse induction gas heater (Sun Star) installed hung from ceiling. During harsh winter days there is a very high pitch noise (Like from a tuning fork)that troubles every one. It sounds after every...

How can we check if the alum flag pole is structurally safe from this kind decorative festive lights strings. The other ends of the strings are attached to building ceiling. I am thinking of calculating the wind force of each string and apply the total of that to the pole and check the...

I am looking for a map of Canada showing design windspeed map for use with structural designs of signs and light post. Can any body point me to a good resource. My google search did not result anything useful.

I have a 150W outdoor LED light fixture that doesn't turn on with 100% brightness. Appears it's only about 25% bright. Cant understand how it's possible. There ain't any dimming controls in them. Then what else could be causing this?

If a given street light pole can take X sq ft max load on a certain windspeed. Switching to an Breakaway anchor bolts will the max load it can take (X sq ft)reduce?

Hello Guys - Any one here know of filler material for welding A356 to Alum 7046 ?

Guys, I need some help here. Is Alum 7046 extruded tube weldable to A356 casting? If so any of you know filler material? Do you see an issue for a 30ft (4ft casting + 26 ft pole) assembly. My concern is that the pole is have a yeild strength of 60ksi & the casting is 12ksi. Normally the...

I have tried to put together a preliminary spread sheet for design parameters. Can some please review these calculation (Only the Green colored cells) & please comment if you see any concerns. Thanks...

Guys, Sorry to ask these questions. With your help I am trying to understand the code & learn the calc procedure. On one reference calcs i have it says: ALLOWABLE UNIT STRESSES - 6063-T6 Aluminum Alloy Allowable Bending Stress: Within 1" of weld Fa = 18000 x 1.33 x 0.85 = 20349 PSI...

Guys I have a question in reference to LTS-6. In the attached image, under height and exposure factor. What is Z in Z/900 stand for. What value should we use?http://files.engineering.com/getfile.aspx?folder=725cf204-40db-4177-a6f9-6c819bc1a9c6&file=image.jpeg

What wind speed do you use for designing street light poles in Bahamas ? Should we use 150 mph?

Want to weld Alum 7046 (Extruded pole ) to Alum 356 ( Cast base). What filler material should we use? Can some one please guide me to a good resource/article on this.