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How It's Made
Season 23 · Episode 4
Railway Bridge Ties, Membrane Filters, Hydraulic Post Drivers, Bi-Planes
10.021mApril 24, 2014
Heavy timbers are cut, drilled and treated for use as railway ties on bridges. Selective membranes are formed and installed in filtration units; hydraulic mechanisms are assembled into machines that drive posts into the ground; and wooden or metal airframes, wings, control surfaces and engines are brought together to build biplanes.
Episodes
- Episode 1Motion Sensors, Belt Loaders, Pheasant Breeding, Diving Helmets
- Episode 2Rawhide Lampshades, Chocolate Chip Cookies, MRI Scanners
- Episode 3Noise Barrier Walls, Front-Load Washers, Bourbon, Flexible Circuit Boards
- Episode 4Railway Bridge Ties, Membrane Filters, Hydraulic Post Drivers, Bi-Planes
- Episode 5Hospital Laundry, Brass Instrument Restoration, Horse Replicas, Excavation Buckets
- Episode 6Ceramic Fireplaces, Synthetic Corks, Parking Garage Floor Slabs
- Episode 7Oil Pressure Sensors, Large Format Printing, Heavy Equipment Simulators, Head & Neck Restraints
- Episode 8Mobile Concert Stages, Mascara, Continuous Miners, Wood Gift Boxes
- Episode 9NASCAR Car Bodies, Hurley Sticks, Tube Power Amplifiers, Thermal Coffee Pots
- Episode 10Electric Vehicle Charging Stations, Grappa, Lunar Rover Replicas
- Episode 11Slate Tiles, Hot Dog Carts, Garage Door Openers, Bicycle Seats
- Episode 12Racing Leathers, Evaporative Cooling Towers, Wood Rocking Chairs, Wire Wheels
- Episode 13Mountain Bikes, Rice, Lever Action Rifles