Author Topic: [Theme] Pictures of manhole covers :)  (Read 17893 times)

Ashlandish

  • NG Supporter
  • **
  • Posts: 117
  • You ARE NikonGear
Re: [Theme] Pictures of manhole covers :)
« Reply #60 on: February 06, 2021, 19:54:49 »
A manhole cover in Beaverton, Oregon, a few blocks from the main Nike campus. No leaves--the sidewalk sweeper must've been a bit ahead of me...
Tim Becraft

mxbianco

  • NG Member
  • *
  • Posts: 563
  • A teddy bear from the Alps, rarely fierce
Re: [Theme] Pictures of manhole covers :)
« Reply #61 on: March 15, 2021, 06:18:54 »
A really small one (10 cm diameter).

Almost invariably they paint arrows across them (e.g your photo, Ashlandish). I understand it as a way to mark the direction for opening, or the prying open point, or the direction of water flow, when not evident on manhole itself.


Ciao from Massimo
Since evolution has given us TWO ears and ONE mouth, we are supposed (me included) to be doing more listening than talking.

mxbianco

  • NG Member
  • *
  • Posts: 563
  • A teddy bear from the Alps, rarely fierce
Re: [Theme] Pictures of manhole covers :)
« Reply #62 on: March 19, 2021, 18:54:54 »
Wind-decorated manhole

A pomegranate plant was losing its flowers, wind carried them a short distance and they were captured by the edges of the manhole...

Ciao from Massimo
Since evolution has given us TWO ears and ONE mouth, we are supposed (me included) to be doing more listening than talking.

mxbianco

  • NG Member
  • *
  • Posts: 563
  • A teddy bear from the Alps, rarely fierce
Re: [Theme] Pictures of manhole covers :)
« Reply #63 on: April 20, 2021, 13:20:14 »
Optical Manhole

From the major Electrical Company in Italy, ENEL. Very nice fisheye effect...

Ciao from Massimo
Since evolution has given us TWO ears and ONE mouth, we are supposed (me included) to be doing more listening than talking.

Zang

  • NG Member
  • *
  • Posts: 309
  • You ARE NikonGear
Re: [Theme] Pictures of manhole covers :)
« Reply #64 on: April 21, 2021, 06:01:55 »
Optical Manhole

From the major Electrical Company in Italy, ENEL. Very nice fisheye effect...

Ciao from Massimo

A nice square one...

The hole underneath is round I guess. Otherwise the lid can fall down.

mxbianco

  • NG Member
  • *
  • Posts: 563
  • A teddy bear from the Alps, rarely fierce
Re: [Theme] Pictures of manhole covers :)
« Reply #65 on: April 21, 2021, 11:05:56 »
A nice square one...

The hole underneath is round I guess. Otherwise the lid can fall down.
Round and Elliptical

Since the diagonal is 1.4142x the sides, it would be very easy to drop the lid inside the hole. I suspect there's a hinge (see center top) to prevent such an instance. You lift it from the opposite side (see lower L and R)

Two smaller ones, one round and the other elliptical. They are used by the Fire Brigade.

Ciao from Massimo
Since evolution has given us TWO ears and ONE mouth, we are supposed (me included) to be doing more listening than talking.