A retaining wall is a structure that retains (holds back) any material (usually earth) and prevents it from sliding or eroding away. It is designed so that to resist the material pressure of the material that it is holding back. An earth retaining structure can be considered to have the following types: Pre-stressed retaining wall Gravity Walls Reinforced Gravity Walls Concrete Cantilever retaining wall Counter-fort / Buttressed retaining wall Precast concrete retaining wall Prestressed retaining wall

Means to complete project activities are called RESOURCES. Examples are People, Machinery, Material, Capital, Time, etc. Peak demands of resources over short periods is undesirable. Resources may be limited or unlimited in nature from project to project.

Detailing is as important as design since proper detailing of engineering designs is an essential link in the planning and engineering process as some of the most devastating connections. ACI Reinforcement location in non prismatic beam. ACI reinforcement detailing in cantilever beam. A design engineer's responsibility should include assuring the structural safety

The Download package contains video tutorials and the companion folder has the primavera course notes used in the primavera project planner video tutorials.

Primavera P6 is able to work with other tools, such as Microsoft Project management software. The calculations done in P6 seem to be more accurate with the real-world results. Free Primavera P6 Video Tutorials - Project Planner Tutorials for Beginners. More Video tutorials for P6 are coming soon on aboutcivil.org