ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat Box
Recent Posts
New tool
by JoeTestingEngr - 10/22/20 12:58 AM
Where is Everyone?
by Bill Addiss - 10/17/20 07:04 PM
Beyond Belief
by gfretwell - 09/27/20 12:03 AM
Questioning the electrical norms
by LongRunner - 09/23/20 06:38 AM
New in the Gallery:
Facebook follies, bad wiring
FPE in Germany pt.2
Who's Online Now
0 registered members (), 13 guests, and 16 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Pole base for Parking Lot Lighting #40478 07/21/04 02:15 PM
Joined: May 2002
Posts: 110
M
mvrandazzo Offline OP
Member
Is there a standard or formula for calculating the size and depth of a concrete base for Parking Lot Lighting? In other words a certain size pole in a certain geographical area need a base so many inches in diameter at a depth of so many feet with so many feet exposed.

Thanks, Mark

Work Gear for Electricians and the Trades
Re: Pole base for Parking Lot Lighting #40479 07/21/04 10:36 PM
Joined: Jul 2003
Posts: 394
B
Big Jim Offline
Member
I suspect that is a local building code issue. The standard pole spec is to withstand 70 mph wind load. There are standard formulas to figure out what that would be in terms of a moment at the base but, if there is no code, an engineer would have to sign off on the actual base. We had some trouble here. Our building was designed by the Corps of Engineers. We needed to modify some exterior lighting due to a new runway being constructed the other side of our common fence with the airport. The specs called for 100 mph poles and the contractor had lots of problems finding anything that met those specs. Oh,well, the city wanted the runway so they paid for all our changes.

Re: Pole base for Parking Lot Lighting #40480 07/22/04 09:52 AM
Joined: Dec 2003
Posts: 751
E
earlydean Offline
Member
Let the engineers do the math. It depends on the height of the pole, the weight of the pole, the wind speed anticipated, the wind resistance of the pole, the soil characteristics, and the water table and the likelyhood of flooding.


Earl
Re: Pole base for Parking Lot Lighting #40481 07/22/04 10:03 AM
Joined: Oct 2003
Posts: 172
G
GETELECTRIC Offline
Member
Talk to a pole manufacturer and they should be able to tell you what you need.

Re: Pole base for Parking Lot Lighting #40482 07/22/04 05:40 PM
Joined: Apr 2002
Posts: 7,211
HotLine1 Offline
Member
MV:
I have excellent results from RUUD Lighting.
THey have EPA wind load info and fixture/pole EPA data in catalog.
Also, Application Engineering is very, very helpful.

ALL of their poles come with anchor bolts, template, and base specs. If you have an unusual situation, they provide base engineering specs with rebar spec'd out also.

John


John
Re: Pole base for Parking Lot Lighting #40483 07/22/04 08:52 PM
Joined: Dec 2000
Posts: 4,283
electure Offline
Member
I 2nd John's suggestion of Ruud.

......They sent me a big coffee cake......

Besides that they're a very good company to work with, for the reasons John gave.
(I'd suggest them even if it was just a donut) [Linked Image]

Re: Pole base for Parking Lot Lighting #40484 07/23/04 02:18 PM
Joined: Apr 2002
Posts: 7,211
HotLine1 Offline
Member
Electure:
I really don't like 'plugging' a mfg on Bill's bandwidth, but...if anyone deserves a plug, it's them. Heck with the 'kringle', but boy it's good!!!

When they say "customer service" they really mean it. Compared to 'other lighting mfgs' who really don't give EC's the time of day, my business goes to them!!

Have a great day.

John


John
Re: Pole base for Parking Lot Lighting #40485 07/23/04 04:59 PM
Joined: Apr 2001
Posts: 507
G
golf junkie Offline
Member
We set 18 40' steel poles today. Each pole had a triple yoke on top for 3 1000w MH floods. I wouldn't even venture a guess about the wind load on that arrangement. The bases were built as specified. I wouldn't want to guess on something like this.

BTW the installation went very smooth. The crane operator was good and followed directions well, which always helps.


Featured:

2020 National Electrical Code
2020 National Electrical
Code (NEC)

* * * * * * *

2020 Master Electrician Exam Preparation Combos
2020 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
CDS
CDS
Nicholson Ga
Posts: 34
Joined: June 2006
Show All Member Profiles 
Top Posters(30 Days)
BigB 3
Popular Topics(Views)
270,722 Are you busy
204,962 Re: Forum
193,068 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.3