ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat
Recent Posts
Increasing demand factors in residential
by gfretwell - 03/28/24 12:43 AM
Portable generator question
by Steve Miller - 03/19/24 08:50 PM
Do we need grounding?
by NORCAL - 03/19/24 05:11 PM
240V only in a home and NEC?
by dsk - 03/19/24 06:33 AM
Cordless Tools: The Obvious Question
by renosteinke - 03/14/24 08:05 PM
New in the Gallery:
This is a new one
This is a new one
by timmp, September 24
Few pics I found
Few pics I found
by timmp, August 15
Who's Online Now
1 members (Scott35), 266 guests, and 14 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
#115077 08/13/03 05:14 PM
Joined: Oct 2000
Posts: 3,682
Likes: 3
Admin Offline OP
Administrator
Member
[Linked Image]

[Linked Image]
Quote
These are some approx $15,000 ea fixtures that weigh about 2000lbs we installed 6 of them on a movie theater.

Each one has 4 - 150 watt MH fixtures that no one will be able to service unless they can fly.

A boom lift will get you close but you will need to climb out of the basket and into the fixture.

It is nice when a customer has money to spend.

Bob Badger
(iwire) - Thanks Bob!

#115078 08/13/03 05:30 PM
Joined: Jan 2003
Posts: 4,391
I
Moderator
Wow Bill you are fast. [Linked Image]

I will point out that the two coworkers on the roof in the second picture have a harness on and are properly tied off.

We could not convince the riggers working for us that the they are also required to be tied off.

I should have sent them off the job but the customer was getting impatient to get his lanterns up.

As big as these are they still look small on the building.

Bob


Bob Badger
Construction & Maintenance Electrician
Massachusetts
#115079 08/13/03 08:20 PM
Joined: Oct 2000
Posts: 4,116
Likes: 4
Member
Well, sometimes I can get them up quick.
[Linked Image]

These are big!
Any major problems with this job?
Did they put some extra steel up there to support these things?

Bill


Bill
#115080 08/13/03 09:22 PM
Joined: Dec 2000
Posts: 4,294
Member
Wow! :eek
The size of these make your workers look like Lilliputians.

#115081 08/13/03 09:42 PM
Joined: Aug 2002
Posts: 1,081
T
Member
By any chance, were these lights manufactured by a subsidiary of this company ?

#115082 08/14/03 05:58 AM
Joined: Jan 2003
Posts: 4,391
I
Moderator
Bill, The company I work for did the original building and we had the fixtures built to a detailed set of prints.

My involvement started after the building was open for a while, I did not see the steel work, I assume (oh no) that the roof was beefed up in that area.

When I arrived there where curbs installed on the roof like you would have for a RTU.

If you look at picture one you can see the crane lifting the upper section up and you can see the square tubing within a square tube that the fixture is made from, the base section was made from 10" x 2" x 3/8" C Channel, allot of it.

The decorative parts where also heavy gauge stock, who ever designed it wanted it to last.

Each fixture is bonded to building steel with 4/0 copper.

The fixtures inside where Crouse Hinds industrial fixtures, not explosion proof but close to it in construction.

When these showed up in our warehouse they were in creates, I thought the warehouse staff was joking when they told me these where the fixtures we had to install on a roof. [Linked Image]

ThinkGood, I do not know if the fixtures where made by the "Big A** Fixture Co" but I liked your link. [Linked Image]

electure, One of the guys is kinda short. [Linked Image]

Bob



[This message has been edited by iwire (edited 08-14-2003).]


Bob Badger
Construction & Maintenance Electrician
Massachusetts
#115083 08/14/03 01:35 PM
Joined: Jun 2003
Posts: 681
P
Member
Bob
Why were the fixtures bonded to building steel? I am not critisizing, just curious.
Lilliputians, electure, sometimes that is how I feel when it comes to knowing the code, very cool reference electure.

Pierre


Pierre Belarge
#115084 08/14/03 03:07 PM
Joined: Jan 2003
Posts: 4,391
I
Moderator
Pierre

The bonding might have been a "field decision" by a coworker but more likely it was in the prints.

When I got to the job there was a wood curb wrapped with rubber roofing membrane, inside the curb was a 12/2 MC and a 4/0 bare waiting to be landed on the fixture.

My guess is this was part of lightning protection, the fixture was lagged to the wood curb material so the fixture would have been isolated from building steel other than the 12 AWG EGC with the MC.

Bob


Bob Badger
Construction & Maintenance Electrician
Massachusetts

Link Copied to Clipboard
Powered by UBB.threads™ PHP Forum Software 7.7.5