What is a Strongback in Construction? Top 5 Tips for building

What is a Strongback in Construction?

A strongback is the temporary structure used to support the formwork of concrete structures. It can be made of wood or steel, and may also include plywood panels that are assembled into an arch shape.

The purpose of this temporary formwork is to create supports for concrete pours so that it doesn’t collapse before the pour has time to set up properly. This process allows for more precise pouring than would otherwise be possible with other forms, such as molds or wooden boxes.

What is a Strongback in Construction?
What is a Strongback in Construction?

What is a Strongback in Construction?

A strongback is a very important part of the construction process. It is the structural support that provides the form for most materials during construction, ensuring proper placement and preventing damage to surrounding areas. The first step in building anything that requires direct placement on a hard surface, such as a wall or floor,is to set up a strongback.

A strongback is typically a large, stable piece of wood. It can be tied to other supports for added strength, but it must always remain stationary and horizontal during the construction process.There are a couple of different ways that a strongback is installed into place: with bolts or tubes that require anchors in the ground or floor below.

Today, the most common strongback construction method is using a hydraulic system to place the strongback. A piece of wood extends from ground level to the correct height and locks into place as it is raised up. This allows for a very large piece of wood to be used as a strongback without having to dig or pour concrete first.

In the past, strongbacks were often constructed using wood planking and held together with metal supports.

Strongbacks come in a variety of sizes and shapes for specific projects. The size and shape of the strongback determine what type of material they will be supporting. For instance, if you need to build a wall that is ten feet long and five feet high, you will need a strongback that is five feet wide by ten feet long. The top of the strongback should be at least four inches thick, to hold the material in place.

What Strongbacks Are Not?

Strongbacks are not structural elements and they do not have to be load-bearing. They can even be considered non-load bearing, which is why these walls don’t need an F or M detachment rating from the IRC (International Code Council) or IBC(Building Regulations).

What is the purpose of a Strongback?

Strongbacks are a type of horizontal member that is attached to the open web joists and reduces vibration while increasing floor comfort. They also prevent joist rollover during construction, which helps make sure your home has great acoustics as well!

Advantages of Strongbacks

Strongbacks are an affordable, easy way to create a strong foundation for your floor. They also provide the perfect surface so you can install sound absorbing materials without worrying about rainwater seepage through the subflooring or air conditioning systems leaking into any cavities beneath it! Strong backs will help keep everything dry and protected while giving us more space during construction- which means lower costs in general for architects.

If there’s one thing I’ve learned from working with clients on their new build projects over here at ABC Corp., its this – floors aren’t just aesthetically pleasing; they’re necessary too because who doesn’t love having clean carpets every day? But if we want these spaces.

Advantages of Strongbacks
Advantages of Strongbacks


What is a Strongback in steel construction?

Strongbacks are a crucial part of any building. They provide additional support for weak spots in an existing structure or add extra depth to bring new load capacities into play, which can be especially helpful during construction projects when you’re trying not only strengthen but also extend your resources as far back from potential destruction zones like windowsills and doorways without adding too much structural weight onto them while constructing stages above ground level.

What is strongback bridging?

Strongback bridging is an excellent and inexpensive way to increase the overall rigidity of your flooring. It serves as a cushion for those living or working in structures with low quality floors, eliminating vibration so they can be more comfortable!

In what location would a Strongback be used?

The strongback is recommended for all framing systems, and it should be located every 8-10 feet along the floor truss. It can support up to 2×6″ lumber with no problem! For thinner material like 1/2 inch plywood or drywall use 4 felled trees (typing FT) when fastening into chord using two #12 screws per screw hole.

This will provide more than enough strength in most situations but if you need even greater durability then consider adding some additional bracing at key locations where there’s likely not much wood around).

Illustration: Bracing Floor Trusses with Strongbacks | SBC Magazine

Can I cut Strongbacks?

Yes, You can cut Strongbacks.

A strongback’s job is to take up the load of your house and distribute it evenly, but if you need a narrow pathway for an HVAC or plumbing run across its length then don’t worry! This can be done by cutting out sections without less than 3 joists per segment. You will also want to overlap them like illustrated here.

That way all parts stay connected even when cut apart from each other with ease say goodbye stress on joints while glueing everything back together again easily in case there are any gaps left behind after cutting through several layers (remember: no nail holes!).


We talked a lot about how to build a strong back in construction, but what exactly is a Strongback? A Strongback is the same as any other form of scaffolding that will be used for building structures. It has been designed with one or two legs and arms which can be adjusted up and down as needed. The best part about this type of scaffold is it’s flexibility.

If you need more room on top, just adjust the height accordingly! And if you want to move your project somewhere else all together- no problem, there are wheels attached at each corner so moving it from place to place couldn’t be easier. As long as your structure needs some help going up, we recommend using a strongback instead.

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