Are you searching for the suitable precast concrete light pole foundation supplier? The one job of a light pole foundation is to keep a pole perfectly upright and stable for decades from wind load and vibrations without settling, tilting or cracking around the base. Otherwise it’s invisible. If it doesn’t, the problem is not the idea of a precast foundation; it’s almost always the precast foundation designer and manufacturer.
This guide will help you to assess a precast concrete light pole foundation supplier to help you end up with light pole foundations that keep every pole upright and don’t lean or crack within a few years of installation.
Selecting a Precast Concrete Light Pole Foundation Supplier Requires More Than Simply Base Dimensions and Price
Base size, weight, and price per unit are the initial factors most buyers consider. While this is a good starting point, it is the failure to include the actual wind and vibration loads to which a particular pole and fixture combination will be subjected at the specific site that determines how the foundation will behave.
The load on light pole foundations is surprisingly heavy for such a small structure. This is a lever effect, the wind’s push at the bottom is amplified by a tall pole and the load is not one, but is constant and repetitive. A supplier that takes foundation design seriously — not “a concrete block with bolts in it” — will take into account the actual pole height, fixture size, and local wind conditions. The one who doesn’t will provide a strong base on the yard and within a few storm seasons will begin to crack, tilt, or begin to loosen the bolts.
Understand the Type of Foundation Required to Project
It is good to understand what type of foundation your project really needs before comparing suppliers because pole height, fixture weight and site conditions all impact the type of foundation that is appropriate.
Standard Roadway and Parking Lot Foundations
Common street and parking lighting poles are supported at moderate heights of the common standards. They require a correct design for the common pole and fixture arrangements, and the anchor bolt pattern must be a perfect fit for the pole manufacturer’s base plate.
High-Mast Lighting Foundations
Tall poles are typically found at highway interchanges or large open areas where wind loading at height also becomes more important and are supported by high-mast foundations. These require much more substantial and reinforced bases, and careful consideration of soil bearing power because the effects of a poorly-sized high mast foundation can be far more dire.
Decorative and Pedestrian Scale Precast Concrete Light Pole Foundation Supplier
In a street, park or plaza setting, shorter, more often ornamental poles are supported by decorative or pedestrian-scale foundations. These are designed to be both a functional foundation and provide a completed, presentable above-grade look; as these foundations are often exposed, not fully buried, there is a focus on both appearances.
Custom and Site-Specific Precast Concrete Light Pole Foundation Supplier
Custom foundations are specially designed foundations built for poles that are not standard, site conditions that are not normal or specific soil types that are not appropriate for a standard foundation. A supplier who will be able to perform an actual site-specific calculation, not just the standard foundation and hoping it’s close enough, is needed for these.
After determining the appropriate category based on the pole height, fixture weight and site conditions, you can reduce your list of suppliers to manufacturers that can show that they have real engineering in their product line.
Question Their Plans in Terms of Structure and Load Calculations
A supplier with a sense of urgency in their foundation production will base their foundation size on your pole height, fixture weight and local wind speed data, rather than a general size “that should be adequate.” This should include a specified design wind load, and the overturning moment that the foundation is designed to resist, and reinforcement sized specifically for that overturning moment.
Specifically ask what the combination of wind load and pole/fixture size the foundation is designed for, what bearing capacity the foundation design is based on, and if they can give you the actual calculation for your project, not just a building in their catalogue. A supplier who responds with actual numbers and is willing to check with your project requirements is talking your language. If the person only quotes a size according to pole height without any load calculation, then you should ask him more questions.
Review How They Do Anchor Bolt Placement & Accuracy
Anchoring in the bolts is one of the most frequent, and significant, issues with light pole installation. Inquire about their accuracy when positioning anchor bolts when they cast, their tolerance on bolt pattern and bolt projection height, and if they test the bolts with your specific pole manufacturer’s base plate template prior to casting.
If the bolt pattern is slightly out of tolerance, it may be difficult or impossible to install poles without compromising the integrity of the connection with field modifications, which can be costly. Specifically request the supplier to verify the accuracy of the bolt template with your particular pole and not with a standard pattern used in the industry.
Examine the Quality Control Process Employed in Their Manufacturing Operations
Two “nominal” size foundations can be exactly the same size and have very different actual performance because of how they were cast. Question the unit casting process, the curing method, the curing time, and the inspection process that takes place prior to the unit being dispatched (such as checking the placement of reinforcement and checking the bolt pattern).
The importance of concrete cover over the reinforcement cannot be overemphasized here because the foundations are usually covered to the ground and are in contact with the moisture in the soil throughout their life. Request the type of cover the supplier uses, and how they assess it during the production process; poor cover is a source of long-term reinforcement corrosion, which only becomes apparent after the foundation has already started to suffer corruption problems.
Do Not Accept a Standard Catalogue Size, Because It Does Not Meet Your Requirements
A competent supplier will check whether the foundation is the right size and shape for your pole height, fixture requirements and local wind and soil conditions before selling you the closest match found in his/her catalogue. This should include checking of the wind load specifications for your project; confirmation that anchor bolt spacing will match the manufacturer of your exact poles; and recommendations for soil conditions which might necessitate a different size foundation than the standard catalogue assumes.
Suppliers that interact with your project-specific conditions will identify discrepancies between catalogue expectations and actual site conditions prior to foundation casting. If a supplier is only providing a standard size chart (just by pole height) and isn’t willing to check any details of the project, you are doing it all by yourself, and you are assuming that you will get the right measurements for this project.
Compare Installation and Handling Requirements
Installing the foundation depends on the size and application. Roadway foundations that are not high masts are usually capable of being handled with standard site equipment, but high masts are significantly larger and heavier, and special lifting equipment and excavation plans are essential.
Inquire with your supplier about lifting and handling; backfill; compaction; and whether they offer any instructions on installation or work with contractors that have experience installing their product. When it turns out that the equipment or excavation depth you need to complete a foundation project is not what you anticipated, you have a surprise on site that costs a lot of money.
Look at Their References and Track Record
Design calculations and reinforcement specifications are a supplier’s promise of what their foundations will do. Poles installed provide an indication of what they have actually delivered. Request examples of foundations provided for similar site and pole heights, and details about their performance over the years – poles standing plumb, no cracking or settling, even during big wind storms.
A long history of pole stability and straightness in real wind conditions is a better indicator of engineering expertise than any catalogue entry.
There Are Some Things You Should Watch for When You See a Red Flag
Some warning indicators tend to reappear with less reliable foundation suppliers:
- Vague responses regarding wind and soil tolerance.
- Unclear anchor bolt tolerances against your specific pole.
- Reluctance to confirm design calculations for your project.
- An unusually low price compared to similar foundation suppliers with no justification.
None of these should automatically disqualify a supplier, but if all three of these are present, it’s a good idea to take your time and seek the advice of a structural engineer before moving ahead with the purchase.
Constructing the Frame of the House Precast Concrete Light Pole Foundation Supplier
Selecting a precast concrete light pole foundation supplier depends on the supplier placing anchor bolts, accurately calculating the reinforcement for the individual pole, fixture and site conditions, and manufacturing with care—it’s not a standard size simply pulled from a catalogue and based solely on the pole height.
Do it right, and the foundation does what it’s intended to do: holds all of the poles up and stable, storm after storm, until the end of the installation’s life.