IBC 2009 Equation 18-1 5

[ToadJones]

Anyone familiar with IBC Equation 18-1 for pole embedments?
My question is, in determining "S1", is it required to use the presumptive lateral load-bearing values of table 1806.2?
The allowable lateral load values of the table seem quite low.
Im not sure what the what the equation was in the older IBC editions.

 

[msquared48]

Salvator?

Mike McCann
MMC Engineering
Motto: KISS
Motivation: Don't ask

 

[ToadJones]

Never had it...I'll have to try it.

 

[Bobber1]

IPA's are excellent. From the traditional British brew that was made extra strong and extra hoppy to survive the long journey to her colonies in India.

Stone Ruination IPA is the best.

 

[ToadJones]

Bobber-
To date, I have been afraid to try Ruination.
It simply scares the hell out of me.
I am afraid I'll never be able to taste any other beer again!
My favortie (for now) Sierra Nevada Torpedo Extra IPA.

 

[SLTA]

completely off subject, but mmmm Torpedo... have some in my fridge right now.

 

[msquared48]

Torpedos will submarine you.

Mike McCann
MMC Engineering
Motto: KISS
Motivation: Don't ask

 

[ToadJones]

Torpedo is bomb....

I think we need to get Mike up there for the Tipster of month or week or whatever...guy is totally willing to help research nasty code provisions for all!!!
Mike- you are appreciated.

 

[hokie66]

He's a good guy, Toad, but the only way he is going to be top Tipster is if you click on the bottom left.

 

[oldrunner]

A couple of other points on using the flag pole formula (Equation 18-1)

1. Determine where your passive pressure starts. Usually the geotech will give this to you. (We have had cases where the passive started about 10 feet below the ground level!)

2. The actual moment on the pole/caisson/pier will be somewhere below the start of the passive. Some published papers use .34d (d = calculated depth). Therefore M = P x (centroid of wind force + .35depth).

3. If you are placing the pole in the fill, then you should probably have a geotech provide you with the passive pressure and starting distance.

If you really want to get into this, look at Section 13.10 Embedment of Lightly Loaded Small Poles and Posts, (page 13-8) of the AASHTO Highway Signs, Luminaires and Traffic Signals (LTS-4-13).

A small spreadsheet is the way to go.

When I worked in London, Watneys pale ale was my usual order.

 

[ToadJones]

oldrunner-
do you know of anywhere I could get a hold of one of these papers?