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10/05/22

Using elongated forms to customise manholes and access chambers

A round manhole

If the round manhole form you’re looking to use suddenly requires a short notice variation to accommodate multiple pipes adjacent to each other, don’t despair. Perhaps your digger has uncovered inlets that are spread a little far apart. But you won’t have to worry about long wait times as you organise a correct fit. You can rely on elongated forms (also known as extended forms) to fully accommodate the configuration of pipes into your manhole, and instantly get your project back on track.

Extended forms are customisable panels inserted into manhole forms that can be adjusted to suit the size variations you require. If need an exact fit in time, extended forms will do the trick. Does this sound like the kind of adaptable tool you’ve been searching for? Allow us to take you through the basics of how they work.


To help, you can view and download our latest prices, delivery charges and guidelines from the links below and get in touch with us using the enquiry form or call us on (07) 3801 5666 or 0437 015 666.

The benefits of elongated forms

It's paramount that your manhole form fits exactly to the correct size you need, whether you’re creating a manhole for sewage, stormwater, or any hardware. For various types of manhole functions and sizes, elongated forms can slot in wherever you need them. The greatest part about using elongated forms on your project is that they can be adapted to meet your measurement specifications with fast adjustments and minimal preparation. Because we value flexibility, Manhole Form Hire offers elongated forms all across Australia.

When using manhole forms for a range of varied applications, you may find that one size does not suit all. In these moments where you’re scrambling to find a way to refit your forms, extended forms will prove extremely useful. Extended forms are longer versions of your average round manhole form and serve to customise your existing form size to exactly what you need, meaning you can get back to work without any project delays.

a round manhole

It’s important that any manholes you’re pouring suit the correct size and accessibility required for their service. If you’re pouring a standard round manhole and realise that you need to change the shape or size of your forms to an extended form, you should reconnect panels correctly so the edges of the panels remain flush against one another. Ensure that you don’t split the forms at the keys, as key edges are angled and must connect with like panels. If you’re looking to utilise elongated forms for your project, Manhole Form Hire offers these extension panels for your convenience.

The importance of correctly assembling elongated forms

Still confused? Here’s an explanation video that walks you through the process and includes visual representations of how to complete every step, as well as exactly where you should avoid splitting.


elongated form

How to use elongated forms

If you’re wondering how to use elongated forms for your projects, here’s a step-by-step walk through:


  1. Any diameter in our round form range can be extended into an oval. Assemble the round form first.
  2. ​Choose 2 opposing joins (not either side of a key) and separate the form into 2 halves.
  3. Insert panels to create elongated forms, check the shape (it should look like the one below) and tighten bolts.


If you’re looking to expand or extend your manhole forms and you are tight on time, extended forms are the perfect tool to safeguard your project pipeline. Don’t waste time worrying about resizing your forms and going back and forth to find the right fit, utilise the malleable functionality of elongated forms and bypass all the hassle.

Manhole Form Hire offers elongated forms all across Australia for your project needs. You can count on their adaptable sizing to ensure your manhole form is exactly right. Manhole Form Hire will deliver to your site next day.

A highly adaptable addition to your project

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Manhole Form Hire’s equipment is available in many different sizes, shapes, and specifications, so you can customise your manhole form based on the job at hand. Here are the main categories of product that we offer:

Our product range

Round, elongated Forms & Pour Boards

Round, elongated forms & pour boards

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Light duty pit boxes

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Manhole form scaffold

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Backdrop panels

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Aspro and neck rings

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