PROJECT MANAGMENT

Project Management



Project Management

Introduction

Some aspects of the design of structural steel components need to take the galvanizing process into account, particularly with regards the ease of filling, venting and draining and the likelihood of distortion. To enable a satisfactory coating, suitable holes must be provided in hollow to allow access for the molten zinc, the venting of hot gases, and the subsequent draining of zinc. Further guidance on the design of articles to be hot-dip galvanized can be found in BS EN ISO 14713: 1999. The suitability of steels for hot-dip galvanizing should also be checked with the supplier.

Design Project of Rail track

For many applications, hot-dip galvanizing is used without further protection. However, to provide extra durability, or where there is a decorative requirement, paint coatings are applied. The combination of metal and paint coatings is usually referred to as a 'duplex' coating. When applying paints to galvanized coatings, special surface preparation treatments should be used to ensure good adhesion. These include light blast cleaning to roughen the surface and provide a mechanical key, the application of special etch primers or 'T' wash, which is an acidified solution designed to react with the surface and provide a visual indication of effectiveness. Distortion of fabricated steelwork can be caused by differential thermal expansion and contraction and by the relief of unbalanced residual stresses during the galvanizing process. Trails are an integral part of our park and recreation system. They are used by people of all ages and abilities to exercise, relax, socialize, view wildlife, and travel to destinations such as school and work. Portland Parks & Recreation (PP&R) is committed to providing trails throughout Portland in response to local, state, and national studies indicating high demand for walking and biking. PP&R interprets the term 'trail' broadly to include sidewalks around parks, park pathways, sidewalks, and enhanced paths on green streets, as well as unpaved pathways in natural resource areas and regional multi-modal trails. One of the goals of Parks 2020 Vision is to “create an interconnected regional and local system of paths and walks to make Portland 'The Walking City of the West.'” This would provide safe and convenient access between parks, natural areas, and recreation facilities and connect them with residential areas, civic institutions, and businesses.

The Vision identified trails as PP&R's most heavily used resource. Completing specific regional trails, and adding more miles of soft-surface trails and other green connectors were key objectives. The trails section in the appendix of Parks 2020 Vision noted that trails are places and connectors that traverse a variety of ownerships and environments, from remote forests to the Central City. It recognized multiple values: recreational, transportation, aesthetic, scenic, environmental, and economic. However, the trail system was acknowledged to have many gaps and lack of connectivity that limited its usability. Insufficient capacity, where older trail segments are too narrow for current, not to mention future, use was also identified as a problem.

Trail Segments

Since the Vision was published in 2001, more ...