Underground utility construction can be a maze of requirements, especially when it comes to choosing the right type of pipe for the job. Municipal projects, in particular, often come with specifications that can vary not just from one city to another, but between different utility districts within the same area. Let’s break down what you need to know to keep your project on track and your bid competitive.
The Basics of Pipe Selection
First off, understand that municipalities often have their own standards for materials. Jeff Spencer, an experienced pro in the field, points out that some places might be strict about the brand or type of pipe you use. For instance, in areas like Metro Nashville, it’s common to see ductile iron or copper used for water lines. When it comes to sewer systems, the requirements might call for ductile iron or various types of PVC, like SDR 26 or SDR 35, depending on the depth and application.
Brand Specifics: What’s in a Name?
It’s not just about the type of pipe but also the brand. Some municipalities specify particular brands, which can mean added hoops to jump through. Jeff explains that while bid packages often call out preferred brands (like American or Griffin pipe for ductile iron), they typically include language like “or equal to.” This means as long as the alternative brand meets the required specifications, you’re good to go.
But don’t get too comfortable. There are always exceptions. Some districts might insist on sticking to a specific brand. This can throw a wrench in your plans if your bid was based on a different, more cost-effective option.
What Happens After Winning a Bid?
Once you’re awarded a project, it’s time to put together a submittal package. This is essentially a detailed list of all the materials you plan to use, including brand names and classifications. The municipality reviews this package, and most of the time, you’ll get the green light. But be prepared for potential pushback. They might circle specific items—valves, fire hydrants, etc.—and ask for something else, like a Mueller valve instead of an American valve.
The Reality of Changes and Costs
As a contractor, your leverage at this stage is limited. If the municipality demands a change in brand, you’ll have to make it work. Jeff notes that once you’re locked into a bid, you can’t go back and ask for a change order to cover these adjustments. This means you might end up eating some of the cost to meet their requirements.
Unit Prices and Adjustments
Municipal contracts often use unit pricing. This makes change orders straightforward but can still impact your bottom line. For example, if you’ve quoted a price for 1,000 feet of 6-inch pipe and they decide to add or remove 200 feet, the change is calculated based on the unit price you provided in the bid.
Underground utility construction comes with its fair share of challenges. Understanding the specifics of pipe requirements, brand preferences, and the flexibility (or lack thereof) in contracts is crucial. As Jeff humorously put it, “you’ve got to know your pipe.” The more prepared you are with the details, the fewer surprises you’ll face along the way.
For contractors looking for a reliable solution for bidding and job costing, check out ProfitDig.com—because knowing your numbers and the intricacies of materials can make all the difference when you’re laying down the pipe.