NYC has new sidewalk shed designs that include an angled roof instead of the normal flat roofs. Interestingly the roofs are angled toward the building instead of away. Despite the roofs allowing some passthrough of rain and snow; people are wondering if there could be an issue with drainage and snow acumination since the angle is pointed toward the buildings.

None of the sources for the new sheds talk about the angled roofs significantly. So, I am wondering what others think about angling the roof towards the buildings.

Sidewalk Shed Monitoring and Removal - Buildings

I feel like I've gone in circles in figuring out how to calc out this connection. I'm bolting a rectangular tube to the web of an I beam. They're aluminum members, both are same depth, and I can't cope the tube to bring the load closer to the center of the beam.

So I'm going bolt double angles from the tube to the girder web. Bolt bearing, shear, rupture is good but I'm not sure about how to check the girder web. How do I consider the eccentricity that the bolted angle introduces into the web?

I'm trying to find a way to lower items 1-5 lbs about 30 feet in 5-15 seconds. The challenge has been doing this automatically in a controlled manner, without having to manually reset it, and without resorting to a microcontroller. (people add/remove the items from the top and bottom though)

(I'll ramble why in a comment)

I have abandoned most constant sources of drag and those that require a user to manage the lowering or else let the load run away or slow to a stop.(i.e. a munter hitch, multiple wraps around a static bar, fishing rod drag-washer-stacks).

so far I'm not convinced I have a good answer: -governors; without a 'throttle' to adjust I don't know if I can get enough braking force out of these -dampers; having trouble with static friction in ones that want to spin fast i.e. eddy current damping, driving a dynamo. Alternatively having trouble finding an appropriate slower damper and speed reduction to go with it because the mechanical advantage makes the resistance curve to the load essentially flat or they heat up and de-tune (i.e. viscous fluid rotational dampers). -escapement mechanisms; too slow, bulky, and/or not easy to reset. Also concerned with bouncing upsetting the mechanism if using mechanical advantage to lower faster but I haven't tested this yet.

Another problem I've had while prototyping is the rope slipping on a pulley. The idea being that one end would be pulled up to a ready position when the other reaches the bottom. Using two opposing spools fixed to the axle solves this

Hi everyone,

I operate a petrol station in Kosovo and I'm planning to install an Automatic Tank Gauging (ATG) system.

I'm considering magnetostrictive ATG probes from ECOTEC or Eaglestar.

My underground fuel tank has the following specifications:

• Total capacity: 50,000 liters
• Two separate compartments of approximately 25,000 liters each
• Internal diameter: 2,480 mm
• Horizontal cylindrical construction with rounded ends
• Existing threaded opening, believed to be 2 inches, on the tank manhole cover

My questions are:

1. Can a magnetostrictive ATG probe typically be installed through this type of opening?
2. What type of mounting adapter, riser, or compression fitting would normally be required?
3. Does the probe need to be exactly the same length as the tank diameter, or can it be longer?
4. Has anyone used ECOTEC or Eaglestar ATG systems? Are they reliable?

I'm looking for technical guidance before purchasing. Any installation will be performed by a qualified technician using appropriately certified equipment.

Thanks!

Eeglestar set from alibaba

Ecotec set from alibaba

Pretty sure they're currently continuing to vent glycidyl methacrylate in Toledo rather than try to contain it and risk an explosion. When the vinyl chloride tankers derailed in East Palestine, OH someone decided to drain them and then set the puddles on fire, burning some and sending most into the atmosphere.

Is there a better option? I was thinking a trailer designed to meet up with an oxygen and fuel trailer. Burn leaking chemical in an oxidizing flame then bubble the exhaust through water from hydrant to be discharged to the sewer. Maybe a tote of caustic (or acid, if necessary) to get pH within spec.

Anyone have a better idea? Let's pretend for the sake of argument there's no political opposition to building/operating such a system.

Agility says Digit 5 will get 90 minutes of runtime from a 9-minute charge, a 10:1 run-to-charge ratio, up from 2:1 on Digit 4. Capacity, chemistry and cycle life weren't disclosed. From an engineering view, how do fast charging and swappable packs compare on cycle life, heat, cost and fleet uptime?

I am a high school senior who is either looking at Electrical engineering or medicine. Either way, I want something fairly hands on instead of totally white collar, so electrical engineering seems to be a good fit (unless I am mistaken). How will AI continue to change the career in the upcoming years?

Thanks guys!