How It's Made S23E4 — Railway Bridge Ties, Membrane Filters, Hydraulic Post Drivers, Bi-Planes
7.0
How It's Made•Season 23•Episode 4

Railway Bridge Ties, Membrane Filters, Hydraulic Post Drivers, Bi-Planes

7.0/10 · 19 votesApr 24, 201421 min

Ranked #10 of 13 in Season 23•−0.2 vs season avg

Discussion

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

Previous episodeE3 · Noise Barrier Walls, Front-Load Washers, Bourbon, Flexible Circuit BoardsNext episodeE5 · Hospital Laundry, Brass Instrument Restoration, Horse Replicas, Excavation Buckets
BestEpisodes
WorstEpisodes
BestSeasons
AllEpisodes

Seasons32

All1234567891011121314151617181920212223242526272829303132

Season 23 Episodes13

Motion Sensors, Belt Loaders, Pheasant Breeding, Diving Helmets stillE1 7.0

Motion Sensors, Belt Loaders, Pheasant Breeding, Diving Helmets

Rawhide Lampshades, Chocolate Chip Cookies, MRI Scanners stillE2 7.3

Rawhide Lampshades, Chocolate Chip Cookies, MRI Scanners

Noise Barrier Walls, Front-Load Washers, Bourbon, Flexible Circuit Boards stillE3 7.4

Noise Barrier Walls, Front-Load Washers, Bourbon, Flexible Circuit Boards

Railway Bridge Ties, Membrane Filters, Hydraulic Post Drivers, Bi-Planes stillE4 7.0Now viewing

Railway Bridge Ties, Membrane Filters, Hydraulic Post Drivers, Bi-Planes

Hospital Laundry, Brass Instrument Restoration, Horse Replicas, Excavation Buckets stillE5 7.4

Hospital Laundry, Brass Instrument Restoration, Horse Replicas, Excavation Buckets

Ceramic Fireplaces, Synthetic Corks, Parking Garage Floor Slabs stillE6 7.5

Ceramic Fireplaces, Synthetic Corks, Parking Garage Floor Slabs

Oil Pressure Sensors, Large Format Printing, Heavy Equipment Simulators, Head & Neck Restraints stillE7 7.2

Oil Pressure Sensors, Large Format Printing, Heavy Equipment Simulators, Head & Neck Restraints

Mobile Concert Stages, Mascara, Continuous Miners, Wood Gift Boxes stillE8 7.0

Mobile Concert Stages, Mascara, Continuous Miners, Wood Gift Boxes

NASCAR Car Bodies, Hurley Sticks, Tube Power Amplifiers, Thermal Coffee Pots stillE9 7.1

NASCAR Car Bodies, Hurley Sticks, Tube Power Amplifiers, Thermal Coffee Pots

Electric Vehicle Charging Stations, Grappa, Lunar Rover Replicas stillE10 6.8

Electric Vehicle Charging Stations, Grappa, Lunar Rover Replicas

Slate Tiles, Hot Dog Carts, Garage Door Openers, Bicycle Seats stillE11 6.7

Slate Tiles, Hot Dog Carts, Garage Door Openers, Bicycle Seats

Racing Leathers, Evaporative Cooling Towers, Wood Rocking Chairs, Wire Wheels stillE12 7.3

Racing Leathers, Evaporative Cooling Towers, Wood Rocking Chairs, Wire Wheels

Mountain Bikes, Rice, Lever Action Rifles stillE13 7.7

Mountain Bikes, Rice, Lever Action Rifles

Cast1

Lynne Adams

Lynne Adams

Narrator (voice)

Discussion

0 comments

Join the conversation

Share your take and reply to other fans.

No comments yet

Be the first to share your thoughts on this episode.

Episode Summary

"Railway Bridge Ties, Membrane Filters, Hydraulic Post Drivers, Bi-Planes" is episode 4 of How It's Made season 23. It scored 7.0/10 from 19 votes, ranking #10 of 13 episodes this season (season average 7.2). It aired on April 24, 2014.

Next: E5 · Hospital Laundry, Brass Instrument Restoration, Horse Replicas, Excavation BucketsBest of Season 23