42 inches
On successful railways it has been found that parallel works the best.
An example of parallel lines are the two rails of a railway track, rails which never meet. An oval is a line or shape that has no parallel lines.
900 mm
No. Terran controls height, not direction.
In most areas it is 40 inches
Is there a standard high of the rail on a pontoon boat
No depending on the size of the rails, and the height they may not fit.
Probably, just measure clearances (Front to back rails), seat height
This literally differs city to city: you have to check your local building code to know for sure. The ideal height is 33" with an acceptable range of 3". In other words it can be anywhere between 30" and 36" above the nose of the tread to the top of the rail. But if you want to be sure and be "legal" in your area, check with the local building inspector.
The inside rails inside of the main rails are called guard rails. They are there so that if there is a derailment the train will stay within the rails instead of off of the trestle.
You would need rails, detector rails, power rails, and minecarts.
Before you decide on the style of railing or baluster, check local building codes for the specs on deck railings. Usually deck railings (guardrails) are required for any deck higher than 30 inches above the ground and for stairs with five or more steps. Local building codes are quite specific about this. Check with the authorities in your area for these specifications. The height of a deck railing is usually between 30 and 40 inches, but again this can be subject to various restrictions normally spelled out in the Uniform Building Code (UBC) or more recently, the International Building Codes (IBC) that have been adopted by most states and counties as LAW. Here are some typical specs for deck railings that you should verify with the building codes in your area: railing height: 36" to 42", baluster spacing: 4" to 6", post-to-baluster spacing: 4" to 6" & deck-to-bottom rail spacing: 2" to 4". Typically, decks and "walkways" elevated LESS than about 30 inches above the surrounding ground level (grade level) do not require a building permit. In this event, "guard rails" may not be required at all. If the deck is elevated greater than 8 inches above grade, stairs are appropriate where the stair height should not be greater than 8 inches high and not less than 12 inches in width (measured front to back.) If more than 5 stairs are needed to reach the deck surface, (40 inches from grade) stair railings will usually be required by Building Code mandates and a Building Permit will normally be required as the project is subject to inspections. If the deck and guard rails are installed in a commercial or public access site, the entire project may ALSO be subject to additional laws governed by the federal Americans With Disabilities Act (ADA.) -- BF
riding the rails was a common term in the great depression. You hop on a train and ride the rails.
Is called the motherboard. In older computers that filled building it was the cabinet chassis and circuit board rails.