Structure Construction
Automating Manufacturing Systems with PLCs.pdf
Taken from PROGRAMMABLE LOGIC CONTROLLERS’s Introduction: Control engineering has evolved over time. In the past humans were the main method for controlling a system. More recently electricity has been used for control and early electrical control was based on relays. These relays allow power to be switched on and off without a mechanical switch. It is common to use relays to make simple logical control decisions. The development of low cost computer has brought the most recent revolution, the Programmable Logic Controller (PLC). The advent of the PLC began in the 1970s, and has become the most common choice for manufacturing controls.
PLCs have been gaining popularity on the factory floor and will probably remain predominant for some time to come. Most of this is because of the advantages they offer: Cost effective for controlling complex systems.
Flexible and can be reapplied to control other systems quickly and easily.
Computational abilities allow more sophisticated control.
Trouble shooting aids make programming easier and reduce downtime.
Reliable components make these likely to operate for years before failure.
LAYMAN’s Guidebook on how Develop a Small Hydro Site.pdf
Taken from Definition of small hydropower: There is no consensus in EU member states on the definition of small hydropower: Some countries like Portugal, Spain, Ireland, and now, Greece and Belgium, accept 10 MW as the upper limit for installed capacity. In Italy the limit is fixed at 3 MW (plants with larger installed power should sell their electricity at lower prices); in France the limit was established at 8 MW and UK favour 5 MW. Hereunder will be considered as small any scheme with an installed capacity of 10 MW or less. This figure is adopted by five member states, ESHA, the European Commission and UNIPEDE (International Union of Producers and Distributors of Electricity).
Thruway Structures Design Manual - 3rd Edition.pdf
Free design manual handbook, in pdf file, issued by New York State Thruway Authority. You will learn various aspects via this ebook/ handbook, specially when it’s related with thruway, railway, structures, structural steel, concrete etc.
Bridge Design Aids - April 2005.pdf
Great Collection ebook about Bridge Design, owned by California Department of Transportation and available freely to download.
Iveco Stralis BodyBuilders Manual.pdf
Bodybuilders manual of Iveco Stralis AS, Stralis AT, Stralis AD also Iveco New Eurocargo in pdf file, a very comprehensive manual for those who drive trucks/cars above and also contains useful informations on parts catalog.
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