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Railway Technical Website
railway-technical.comA concrete sleeper can weighs up to 320 kg (700 lbs) compared with a wooden sleeper which weighs about 100 kg or 225 lbs. The spacing of concrete sleepers is about 25% greater than wooden sleepers. Another type of concrete sleeper is shown in this drawing (left). This is the twin-block sleeper. The design consists of two concrete blocks
CONTENT PRECAST CONCRETE PANEL - City University of …
openlab.citytech.cuny.edu-The R value achieved by precast concrete insulated wall panels can vary widely depending on the desired performance of the wall panel.-Increased R-values are achieved by increasing the insulation thickness between the two concrete panels.-R-values for insulated wall panels range from R-5 to R-50.