John W. AndrewP. Course Outline. This course highlights the requirements for determining the embedment depths required and foundation pressures for pole foundations for signs, flagpoles, light poles and pole framed buildings in accordance with Section and Paragraph The course is designed to help architects and structural engineers become familiar with the design criteria for pole foundations.

A copy of the International Building Code is required for this course. This course includes a multiple-choice quiz at the end, which is designed to enhance the understanding of the course materials. Learning Objective. Intended Audience. Benefits to Attendee. The Attendee will learn how to determine the embedment depths and foundation pressures for many pole type structures, including signs, flagpoles, light poles and pole framed buildings.

These pole foundations may be more efficient and easier to install than conventional spread footings in many applications. Course Introduction. Poles foundations are commonly used for sign, flagpole and light pole foundations and pole framed buildings. A design criteria for pole foundations is indicated in Section and Paragraph This criteria applies to vertical poles considered columns embedded in either earth or in concrete footings in the earth and used to resist lateral loads.

The backfill in the annular space around a column that is not embedded in a concrete footing shall be clean sand thoroughly compacted by tamping in layers not exceeding 8 inches in depth. Course Content. Pole Foundation Design with Spreadsheet. Please click on the above underlined hypertexts to view, download or print the document for your study.

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Because of the large file size, we recommend that you first save the file to your computer by right clicking the mouse and choosing "Save Target As You may need to download Acrobat Reader to view and print the document. Course Summary. This course covered the requirements for determining the embedment depths required and foundation pressures for pole foundations for signs, flagpoles, light poles and pole framed buildings in various types of soil in accordance with the International Building Code.

Related Links and References. Q uiz. Once you finish studying the above course contentyou need to take a quiz to obtain the PDH credits.

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Print this page.Log In. If you have Mathcad it's fun to play around with. RE: Light pole foundation design Dude It does Pole design, footing design, etc. Ah, anonynimity But perhaps that is just so they don't get sued by some yahoo on eng-tips.

I've set it up on a spreadsheet, but it can be worked through easily by hand Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework. The Eng-Tips staff will check this out and take appropriate action. Click Here to join Eng-Tips and talk with other members! Already a Member?

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aashto light pole foundation design

Students Click Here. Related Projects. Hi wind loads create a considerable moment. Any ideas? We usually use a drilled concrete pier for light pole foundations. You can model the pier in a 2D analysis program. Another proprietary program is "L-Pile". Not sure where you can find it online.

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How can this issue be address when there is a limitation of the width of the foundation in the direccion of the moment Agree with JAE. If possible, use a drilled pier.This section requires more stringent breakaway characteristics. Breakaway light poles rely on frangible transformer bases to provide the breakaway feature.

The AASHTO specification provided for a similar change in momentum except that the test vehicle weighed 2, pounds. While providing the necessary frangibility, the base must also be structurally adequate to support the illumination pole for design wind speeds. This model number is required to be incised on the base. No tolerances for these variables have been established. Whenever a pole is knocked down, the transformer base should be replaced even if it is still intact.

TxDOT typically uses breakaway poles wherever possible, even when not required. Do not use shims or washers to level breakaway base, because this may change the breakaway characteristics of the base.

Ensure that the top of the concrete foundation is level. When relocating breakaway roadway illumination poles, Item requires a new transformer base to be installed. The old breakaway base should be destroyed to prevent reuse. This includes breakaway poles installed by maintenance forces at new locations. Cities installing light poles or maintaining lighting systems on state right-of-way must abide by these same guidelines. Districts should keep city maintenance personnel informed of the different system requirements and the allowable uses of the various transformer bases.

The old and new transformer bases can be distinguished from each other by height and model number. The old bases are 20 inches tall, while the new ones are 17 inches tall. Tests have shown that breakaway luminaire supports do not operate properly when the vehicle strikes the pole too high above the ground.

aashto light pole foundation design

Breakaway poles should, therefore, not be placed in areas where they are likely to be struck more than 28 inches above the top of the foundation. Limiting the negative side slopes to between roadway and luminaire supports should ensure acceptable striking height. This will help to ensure proper operation of the pole and breakaway device.

Search for the word or phrase:. Conventional vs. Anchor: i Structural Requirement While providing the necessary frangibility, the base must also be structurally adequate to support the illumination pole for design wind speeds. Anchor: i Relocated Poles When relocating breakaway roadway illumination poles, Item requires a new transformer base to be installed.

Anchor: i Guidelines Apply to Cities Cities installing light poles or maintaining lighting systems on state right-of-way must abide by these same guidelines. Anchor: i Identifying Transformer Bases The old and new transformer bases can be distinguished from each other by height and model number.

Anchor: i Striking Height Tests have shown that breakaway luminaire supports do not operate properly when the vehicle strikes the pole too high above the ground. Search in: this manual only.POLEFDN is a spreadsheet program written in MS-Excel for the purpose of analysis of a pole foundation assuming the use of a rigid round pier which is assumed free unrestrained at the top and subjected to lateral and vertical loads.

Specifically, the required embedment depth, the maximum moment and shear, the plain concrete stresses, and the soil bearing pressures are calculated. Since there is not a universally accepted method for pole foundation analysis, this program offers up five different methods of determining embedment length for pole foundations. The "Pole Fdn Czerniak " worksheet is the primary method emphasized in this program, since it provides the most detail in overall analysis.

However, it does yield the most conservative embedment depth results of all the methods presented. ST2, PaperMarch This program will handle both horizontally as well as vertically applied loads.

The vertical load may have an associated eccentricity which results in an additional overturning moment which is always assumed to add directly to the overturning moment produced by the horizontal load. This program assumes that the top of the pier is at or above the top of the ground surface level. This program assumes that the actual resisting surface is at or below the ground surface level.

This accounts for any weak soil or any soil which may be removed at the top. The "Pole Fdn Czerniak " worksheet assumes that the rigid pier rotates about a point located at a distance, 'a', below the resisting the surface. The "Pole Fdn Czerniak " worksheet calculates the "plain" unreinforced concrete stresses, compression, tension, and shear in the pier. The respective allowable stresses are also determined based on the strength f'c of the concrete.

This is done to determine if steel reinforcing is actually required. However, whether minimum reinforcing is to be used or not is left up to the user. The respective allowable passive pressures at those locations are determined for comparison. However, it is left up to the user to determine the adequacy.

Since all overturning loads are resisted by the passive pressure against the embedment of the pier, this program assumes that the pier acts in direct end bearing to resist only the vertical loading. The bottom of pier bearing pressure is calculated, which includes the self-weight of the pier, assumed at 0. Beam on Elastic Foundation Analysis. BOEF is a spreadsheet program written in MS-Excel for the purpose of analysis a finite length beam with free ends supported continuously on an elastic foundation.Numerous problems can be avoided by simply picking the correct bookie, and if you are new to the world of online betting, you will want to continue reading as we outline the most important aspects to consider when you decide to start placing your bets via internet.

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aashto light pole foundation design

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