Steel Post with Cantilever embedment depth

[SuckSqueezeBangBlow]

Does anyone know how to calculate the minimum embedment depth required to support a steel post subjected to an equivalent load shown in this image? The steel post would be 1/8" mild steel square tubing, the load takes into consideration the weight of the steel tubing as well as additional equivalent loads. The soil type would be standard soil in Phoenix Arizona.

Thank you,

 

[bridgebuster]

The attached spreadsheet should help. It has individual sheets for various methods. I typically use the IBC method.

 

[HTURKAK]

The following nomograph from the book FOUNDATIONS OF STRUCTURES, by DUNHAM , 1950.

You may look to the following doc. ( some pages from the same book ) with worked examples.








Use it up, wear it out;
Make it do, or do without.

NEW ENGLAND MAXIM

 

[TTomaz]

I'm not familiar with the soil of Phoenix Arizona, but if we are talking about non-cohesive soils, you can give a try on simplified theory fo Broms (1964, 1965), which estimates the ultimate lateral capacity of the soil.

The method does not consider the contribution of friction (shaft friction) from the contact between fill material and soil, and proposes a method that considers the pole as a rigid element, determining the embedment based on a passive load (thrust) distribution of the soil.
According to the theory, the ultimate lateral resistance is assumed to be equal to three times the passive Rankine pressure.

Not sure what the reference is, but I got it from some geotechnical book some time ago, maybe Bowles.

Edit: You can find more information for both cohesion/non-cohesive soils in chapter 7 of Pile Foundation Analysis and Design by HG Poulos and EH Davis.