Composite TotalJoist: A Superior Flooring System

COMSLAB® is an innovative composite floor system that combines deep steel decking and concrete into a single structural element. By allowing the two materials to work together, the system delivers exceptional strength while helping to reduce construction costs and shorten project timelines.

Designed to provide a two-hour fire rating, COMSLAB® is a popular choice for hotels, multi-storey residential buildings, long-term care facilities, schools, office buildings and other commercial developments. Its combination of structural performance, fire protection and construction efficiency makes it well suited for a wide variety of building types.

Beyond its construction benefits, COMSLAB® supports sustainable building practices through reduced material waste, recyclable components and LEED®-friendly design opportunities. The result is a practical flooring system that delivers performance, efficiency, and long-term value.

Key Benefits

Material Efficiency

COMSLAB® maximizes material efficiency by combining steel and concrete into a highly optimized composite floor system. Compared to a conventional 9″ slab, it requires significantly less rebar, concrete and shoring, helping reduce both material costs and labour requirements.

Fasttrack Construction

Designed for speed, the lightweight interlocking deep deck system installs quickly and provides an immediate safe working platform for trades. As a permanent concrete form, COMSLAB® streamlines construction schedules and helps projects reach completion faster.

Long Spans

COMSLAB® delivers long clear spans of up to 32 feet, creating flexible open-concept spaces with fewer supporting columns. Its shallow floor profile also reduces overall building height while maximizing usable interior space.

Versatile Materials

The system integrates seamlessly with a wide variety of structural systems, including steel, concrete, masonry, insulated concrete forms (ICF) and wood framing. This versatility makes COMSLAB® suitable for a broad range of commercial, institutional, and residential applications.

Fire-Rated Assemblies

COMSLAB® offers a range of UL and ULC-listed fire-rated assemblies, providing up to three hours of fire resistance without additional protection in many applications. These tested assemblies help designers meet building code requirements while maintaining design flexibility.

Sound Attenuation Performance

Engineered for occupant comfort, COMSLAB® floor assemblies can achieve sound attenuation ratings of up to STC 61. This level of acoustic performance helps reduce noise transmission between floors in multi-unit residential, hospitality, healthcare, and office buildings.

Lower Foundation Cost

The lightweight design of COMSLAB® reduces the overall dead load imposed on the structure and foundation. As a result, foundation requirements can be significantly reduced, lowering construction costs to approximately half of conventional cast-in-place slab systems.

Sustainable Construction

COMSLAB® supports sustainable construction by reducing the quantity of concrete, reinforcing steel, and temporary materials required on site. Its efficient use of resources contributes toward green building objectives.

Proven Structural Performance

Backed by extensive real-world applications, COMSLAB® delivers exceptional strength and long-term reliability. Its composite design provides excellent load-carrying capacity while maintaining the flexibility needed for many building types.