The Atterberg limits, created by swedish chemist Albert Atterberg, are the moisture content, in percent, at which the soil changes state. They are defined as: Plastic Limit (solid to plastic) Liquid Limit (plastic to liquid) Some textbooks often refer to a third Atterberg limit, the “shrinkage limit” which defines the boundary between “solid” and a […]
Archives for November 2019
Types of Pedestrian Bridges
A pedestrian bridge is often one of the most visible parts of a development, showcasing the park or trail and giving it a distinctive personality. Therefore, you need to know what the types of pedestrian bridges are so you can plan for a bridge that you’re proud of and will serve the needs of its […]
The 7 Types of Culverts
Culverts are highly efficient structures that move water and people underneath a road. However, there isn’t a one-size-fits-all culvert type that meets all design considerations. To that end, let’s explore the different types of culverts that can be considered for a site: Corrugated Steel Pipe (CSP) Structural Plate CSP Open bottom CSP Concrete Pipe Concrete […]
Types of Standard Bridges in Alberta
Standard bridges are an excellent option for small sites where it is desirable to save money. A standard bridge is a bridge of pre-designed components, for example, abutments, piers, and girders. Alberta Transportation currently maintains three main types of standard bridges (defined by their girder type) with variations for abutments and piers. The three types […]
How to Get More STIP funding for your County
Alberta Transportation’s Strategic Transportation Infrastructure Program, or STIP for short, started in 2017 and combined several funding sources into one. There are four components: Community Airport Program ($2 million) Local Road Bridge Program ($16 million) Resource Road Program ($6.5 million) Local Municipal Initiatives ($5 million) In this article we investigate the projects that have been […]
The 6 Types of Bridges
Since the earliest recorded history, modern man has sought to cross chasms. In fact, there is an element of pride as well as function in separating moving features like water and traffic above and below one another. Engineers have long developed specialized methods for designing many types of bridges, and they still push out the […]