Box Voids, 4in Depth

4in Depth Box Voids: 4 Void Form

Versatile, Cost Effective Concrete Slabs

• Forming concrete slabs protects below grade utilities from expensive and costly damage caused by soil pressure.

• One piece unit, no stapling, taping or banding. Self locking.

• Ends are closed, no end closures. No concrete leakage.

• 1200 pounds per Sq. Ft. vertical strength.

• Lateral stability, no side bracing required.

• Easily assembled on site.

• Assembles with one man.

Deslauriers Box Voids can be used to create a void area under load bearing grade beams or slabs for expansion.

Box Voids hold up the weight of fresh concrete long enough for the concrete to cure and support itself on slabs, piers or grade beams. Since it’s a paper product, it absorbs the moisture of the surrounding soil and concrete, and its supportive strength gradually diminishes over time.

Box Voids can be assembled on site in minutes with no special tools. Available in 4’ length, 12” wide, 4” or 6” high. Made from double faced corrugated fiberboard, wax coated and laminated.

4in Depth Box Voids is a versatile, cost effective way to form concrete slabs. Forming concrete slabs protects your below grade utilities from expensive damage caused by expansion pressure.

One piece unit, no stapling, taping or banding. Ends are closed, no end closures. No concrete leakage. 1200 pounds per Sq. Ft. vertical strength.

Easy assembly is a big feature of the Box Voids. Assembles on site in minutes with no special tools. One man to assemble, saves time and labor.

Box Voids are designed to create a void area under load bearing beams or slabs for soil expansion. Holds up the weight of fresh concrete long enough for the concrete to cure and support itself on slabs, piers or beams. As a paper product, it absorbs the moisture of the surrounding soil and concrete and its supportive strength gradually diminishes.

Available in 4’ length, 12” wide, 4” or 6” high. Made from double faced corrugated fiberboard, wax coated and laminated.

Also available are Air Void Determination for Concrete, Concrete Tremie Pipe and Products, Concrete Forming products. We have everything you need for concrete construction.

Choose the 4in Depth Box Voids for slab forming and protection and stability. Easy to assemble and economical.

What are Box Void Forms?

Box Voids are a type of void carton forms used in concrete foundation construction to create space between the concrete foundation and expanding soil. Box void forms are specifically designed to create void areas under load-bearing beams or slabs, facilitating expansion. They are used to hold up freshly poured concrete until it has enough strength to support itself on slabs, piers or grade beam. Made from double faced corrugated fiberboard, Box Voids have high strength and durability. The fiberboard is wax coated and laminated for long life and reliability in harsh construction conditions. It’s a must have for soil and concrete protection.

Types of Box Voids

Box voids are a versatile and economical means of forming concrete slabs, and they come in various types to suit different construction needs. Here are some of the most common types of box voids:

1. Standard Box Voids: These are the most commonly used box voids, made from double-faced corrugated fiberboard, wax-coated, and laminated for durability. They are available in various sizes, including 4” depth, 12” width, and 48” length. Standard box voids are ideal for general concrete slab applications where soil expansion is a concern.

2. High-Strength Box Voids: Designed for heavy-duty applications, these box voids offer a higher weight capacity and increased vertical strength. They are perfect for use under load-bearing grade beam or slabs that require additional support. The robust construction ensures they can withstand the pressure of fresh concrete while providing the necessary void for soil expansion.

3. Degradable Box Voids: Made from materials that can degrade over time, such as molded paper or corrugated paper, these box voids are suitable for construction sites with a sufficient water supply to degrade the material before soil occurs. Degradable box voids are particularly useful in areas with significant soil movement, as they create a void that accommodates expansion without compromising the integrity of the concrete slab.

4. Collapsible Box Voids: These box voids are engineered to collapse under the pressure of expansive soil, providing a void between the foundation and the soil. They are strong enough to withstand the pressure of fresh concrete but weak enough to yield to the pressure of expanding soil. Collapsible box voids are an excellent choice for projects in regions with highly expansive soil, ensuring the concrete structure remains stable and undamaged.

Construction and Materials

Box Voids are made from high quality materials to meet the demands of concrete construction. These forms are designed for blocks allowing void for soil, ensuring the structural integrity of the concrete during the curing process. Double faced corrugated fiberboard provides good resistance to moisture and compression for slab forming. Wax coating and lamination makes it strong and durable to hold the weight of fresh concrete. Available in 4” depth, 12” width, 48” length.

Applications and Benefits for Load Bearing Beams

Box Voids are used in many applications in concrete construction, especially in creating voids under load bearing grade beam or blocks. Box forms are versatile and can be easily assembled on-site, making them an efficient solution for various construction needs. This allows space for soil which is necessary in areas with expansive soil. By using Box Voids, construction projects can reduce soil excavation and concrete quantity, saving cost and time. Box Voids also adds stability to concrete slabs, a must have in protecting concrete structures from uplift pressures produced damage. Easy to assemble on site with no special tools.

Installation and Considerations

Box Voids are easily assembled with minimal labor and expertise. They can be assembled on site with no stapling, taping or banding required. However, please consider the soil and concrete conditions around the Box Voids. The weight of fresh concrete and soil must be taken into account to ensure the Voids can support. Over time the supporting strength of Voids will decrease as they absorb moisture from the soil and concrete, so proper installation and consideration of environmental factors is important.

Frequently Asked Questions

1. What is a box void, and how is it used in concrete construction? A box void is a sacrificial formwork member used to create a space between the concrete foundation and expansive soil. It provides temporary support for fresh concrete until it achieves adequate strength to support its loads. This helps in forming concrete slabs and protecting them from soil expansion pressure.

2. What are the benefits of using box voids in concrete construction? Box offer several benefits, including reducing soil excavation, decreasing the quantity of concrete needed, and creating a more stable slab. They also absorb expanding soil volume and reduce the risk of damage caused by soil expansion, ensuring the longevity and durability of the concrete structure.

3. What is the typical space between a foundation and underlying expansive soil to install box voids? The spacing between the concrete foundation and expansive soil underneath ranges from 5 cm to around 60 cm, depending on the potential upward movement of the soil. This space allows for soil expansion without exerting pressure on the concrete slab.

4. What type of box void is suitable for use under a concrete slab? Degradable box are the most suitable for use under a concrete slab, as they can degrade over time and provide a space between the foundation and the soil. This degradation process ensures that the void space is maintained, accommodating soil expansion and protecting the concrete slab.

5. How do box voids protect concrete slabs and surrounding soil? Box protect concrete slabs and surrounding soil by providing a space between the foundation and expansive soil, reducing the risk of damage caused by soil expansion. They absorb the expanding soil volume, which helps in maintaining the stability of the concrete slab and reducing the quantity of concrete required for the project. This makes voids an essential component in areas with expansive soil, ensuring the integrity and longevity of concrete structures.

Conclusion

Box void forms are a versatile and reliable solution for creating voids under load-bearing beams or slabs, allowing space for soil expansion. Made from double-faced corrugated fiberboard and wax-coated, they are durable and strong for various concrete construction applications. Easy to install and offering many benefits, box void forms are a must-have in concrete construction, especially in areas with expansive soil. Choose box void forms and get a stable, efficient, and cost-effective way to manage soil expansion and your concrete projects.