B1010−Floor Construction

Category Archives: B1010−Floor Construction

Specifying Steel Fibers for Concrete Floors

Photo © BigStockPhoto/Jacek Sopotnicki

Thin, short strands of steel are being increasingly specified as reinforcement in ground-supported slabs and in composite steel deck-slabs. Structural engineers are still figuring out how best to design with these components, but specifiers need to think about how to define this material in the contract documents. Dosage is critical, for one thing, but not all fibers are alike. Without specifying other key details, one can end up with concrete that contains the specified mass of fibers, but does not fulfill the designer’s intentions.

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LCT ONE: A Case Study of an Eight-story Wood Office Building

All images courtesy Cree GmbH

LCT ONE is an eight-story, timber-based sustainable building developed in Austria in 2012. The goal of the project was to develop a flexible, high-performance, prefabricated construction system as a new product, which meets all technical and economical requirements of modern real estate markets. The project is based predominantly on a renewable resource—wood, with additional emphasis placed on resource and energy efficiency. The project is meant to demonstrate to the building industry that there are new timber technologies and industrial processes where a modern, system approach to construction can be applied.

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Better Concrete Starting at the Finish: Long-term benefits of colloidal silica-based finishing

Images courtesy Lythic Solutions

Recently, concrete contractors have started using a colloidal silica-based compound as a finishing (or ‘troweling’) aid for flatwork. It makes the surface denser, and increases the quality of cement paste. Additives in the compound help the surface slow evaporation though hydrophobic properties, protecting the concrete from a range of moisture loss-related defects. It also makes it unnecessary for contractors to add water to finish the concrete. The result has implications for buildings, pavements, roadways, bridges, and even precast structural and architectural concrete.

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Designing Floors for Optimal Performance: Understanding the impact of product choices and installation methods

All images courtesy Weyerhaeuser Trus Joist

When designing a wood-framed floor system for multi-family projects, from the joists to the subfloor, specifiers have numerous options for the level of performance related to occupant comfort. The size and thickness of floor framing materials, the way the members are laid out, and the manner in which they are installed have a direct influence on how stable the floor will be underfoot and how well the finished flooring on top performs over time.

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Ensuring Balcony Durability: Waterproofing details that stand the test of time

All images courtesy Building Diagnostics Inc.

The durability of wood-framed balconies varies widely, with too many suffering from leaks, visible damage on the finishes below, and concealed structural damage from continued water migration. Balconies are vulnerable to decay because they catch rainfall and direct it to a myriad of intersecting planes. There are subtle—but important—differences between the construction of balconies that function for the design life of the building and those failing prematurely. This article presents successful design and construction practices based on a visual survey of over a thousand balconies, excavations into over 200 balcony soffits to check for structural damage, destructive evaluation of selected balconies, and water testing.

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Standardizing Concrete Polishing

Photo © Chris Rains, Ardor Solutions

Economical, durable, and aesthetically pleasing, polished concrete floors are no longer a novelty as they are continually used for industrial, commercial, and residential projects. What has not become standard is a set of unified terms or policies that might aid in their specification and in the communication between contractors, architects, and owners—this could have adverse consequences with regard to the equipment and/or processes used to construct a floor in the field.

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