How strong is plexiglass? How thick does it need to be to have people walking on it?
542287
Have you ever been to a discotheque (disco) or dance studio where they have lited floors. That is plexiglass you are standing on.\n\nAbout 1/2in thick for 18in-sq panels will support a 250lb person.\n\nCheck with the manufacturer, Lexan Plexiglass first.
1187231
hello friend!\n\nuse a non-flexible thread. tie a simple knot first. roll the thread at the balloon stout for 3 times. then again tie a knot. again roll it for 3 times and then tie two knots. trust me! this would work! it wont leak a bit even if u leave it for a night!!!\nhappy fighting!!
194351
The load it can carry depends on the length of the span. That is a 10 foot length can carry a heavier load than a 20 foot length and so on. Also it depends on whether it is a cantlever load or whether it is supported on both ends.
1090483
Too bad I can't vote best question for you! That is an awesome idea! I would agree that it would work because of alot less drag, but yeah, you would still have to worry about debris..But-if an entire neighborhood was dome-shaped, then there wouldn't be very much debris at all...concrete domes!
316476
List of plausable materials, what the substrate is made up of, bracing materials, and method to be used. Will you need to use a liner to prevent washout?
923963
Traffic timing for this much weight is also considerable. A\n   building code shows that you might need 15 or more for\n   this area so titanium is probably out.  The core value of\n   bronzed steel is ok for the average busy building.  Size again\n   must be measurables ranging from 2.7 to 3.7 made in 20 foot\n   can be made in 35 precise.
1178934
depends on thickness of slate-but it will be very heavy-old hippie
842814
Consider looking up Polycarbonate\n\nPolycarbonate is a clear polymer that is used in bullet proof glass.  It is commonly used nowadays in homes to resist breaks.  \n\nAcrylic is also used and is more flexible but less impact resistant.\n\nBoth of these materials are available at hardware stores such as Lowes.  If you seeking profession installation, just ask about the two materials, acrylic is cheaper then polycarbonate, usually by about 1/3 the cost.  \n\nIf you are only considering windows that resist breaking due to wind force, go for acrylic, its cheaper and the wind force, even at high pressure, may bend an acrylic panel, but will not break it.   \n\nThe polycarbonate will not only resist winds, it will flex less, and given the right thickness can stop a baseball bat or ball. crow bar, and even thicker, will repel small arms fire.  \n\nBoth materials flex to some degree, but return to their original flatness immediately.  Both materials are plastics and must have a UV protective coating to prevent "yellowing"  The protective coating, which is put on the outer surface, should be on any of the material you purchase that is intended for outdoor use.  The coatings guarantee no yellowing for 10 years.\n\nmore FYI, The combination of the two materials is used by a particular company to make one-way bullet proof "glass" really  sandwich of the two materials, with the more flexible acrylic on the bad guy's side.
248692
Need to know the type of metal and thickness to answer this question.
411381
About 6 feet, which isn't an issue, unless you live at,near or below sea level. If you do, you should move anyway.
813134
how about plywood and fake turf covered w/a white runner?
779702
plastic and rubber...hopefully strong plastic
941809
I think the formula is 3 sq ft per person...but try this link as well
220138
Aluminum, strong, light.
745166
focus on a triangular frame- these frame are the strongest. also try googling for the manufacture of bridges and find out why certain bridges are built.
778355
You have to be able to open a window that you can climb out without using any other obstacles to climb on to. If you can reach the top window and be able to escape out of it without any problems you should be fine. The size of the drop doesn't matter cuz the way the fire inspectors see it is people would rather break a leg or arm than burn to death cuz they cant open the window
1014671
well, you need to consider the maximum load and maximum accleration that the arm will ever see.  you then have to design the structure to withstand the stress from that load.  i would suggest using a "safety factor" of at least 1.5 if you have never done this before.  also you may want to consider the impact or almost instantaneous acceleration when the package is placed.  once you get the physical arm done, you then need to size the pneumatic actuator to provide not only the force required, but the stroke, and time response.