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Should I use screws or nails?
nails are cheaper and easier, but screws
generally work better. Use drywall screws instead of wood screws.
Drywall screws are usually stronger and you don`t have to drill pilot
holes, just drive them straight into the wood. I would highly recommend
that you use screws for the surface, even if you nail the frame
together. It`s a real bitch to get hung up on a nail that is sticking
out of the surface.
What should I use for coping?
Metal (i.e.-steel) coping works best.
plastic can also be used. If you want to, you could even use pool
coping. Use one continuous piece of coping on each side instead of
several small pieces. It`s also a bitch to hang up on a coping seam.
What about measurements?
The surface-supporting 2x4`s should be no more than
6 feet in length. 4 feet is usually a good measurement because you can
simply cut 8 foot 2x4`s in half. They should be spaced no more than 8
inches apart (unless you are building a vert ramp, in which case they
can be slightly farther apart at the top). Also, when designing your
ramp, make sure you have the correct amount of flat bottom. You don`t
want your ramp to be too fast or too slow.
What about the foundation?
It`s easy if you are building on level ground. Otherwise,
you`l have to level the ramp somehow. One way is to build the frame
first and then level it by shoring it up with railroad ties,
cinder blocks or whatever. Just make sure it is stable. Another, more
stable, more time-consuming way is to drive a 6x6 post into the ground
wherever your ramp needs support and build the frame right onto these
posts. Use a post-hole digger (available for very little cash at your
local K-mart. BOYCOTT WAL-MART.) to dig the holes at least a foot deep
and then pour cement around the posts. use a carpenter`s level to make
sure they are straight up.
What about platforms?
VERY important. most people build shitty platforms. DON`T!
A good, level, stable platform makes a huge difference. It should be at
least 4 feet wide. Wider if your ramp is really big.
Ramp width?
8 feet is really too narrow, unless you need to fit the ramp in
the confines of your garage or something. 12 feet is usually baseline,
for a mini-ramp. 16 feet or wider is pure heaven.
What about transitions?
take your time when cutting them out. make them as perfect
as possible. A rush job results in a shitty ramp. Most people cut one
transition as a template for the rest. This is a good idea. Make your
template absolutely perfect and MARK IT. That way, you won`t get
confused about which transition is the template. Use one template to
trace the pattern for every transition. If you use a different
transition as a template every time, it`ll create a compounding error,
making your ramp impossible to surface. Also, make sure that when you
attach the transitions to the frame, they line up perfectly or it will
be impossible to surface.
How do I position the surface support 2x4`s?
Attach them so that the 2 inch side will be against the surface of the
ramp. If you put them on so that the 4 inch side touches the surface,
it will weaken the ramp over time. By positioning them correctly, they
don`t bow as much from the weight of people skating the ramp. This
will just add to the overall life span of the ramp.
What kind of plywood should I use?
Use the most inexpensive 3/4 inch plywood you can find for the
transition sides. When surfacing it, I would suggest using 2 layers of
plywood that add up to 3/4 inch in thickness (or more). For example,
you could use inexpensive 1/2 inch ply for the first layer and then
cover that with a better quality 1/4 inch layer. This will give you a
strong, smooth surface.
Should I layer it diagonally?
If you have the money to waste, go for it. The point of layering it
is this: the ramp will skate faster when you are riding with the grain
and slower when you are riding across the grain. Diagonal layering
may provide the best compromise, but it tends to be a big pain in the
ass and a waste of plywood. I suggest putting the surface on so that
the grain runs lengthwise on the ramp. You cover more ground going
back and forth than you do along the coping, so this should make it
nice and fast.
Is masonite a good surfacing material?
Some people think so. I don`t like it. It is fast and smooth, but
those are the only benefits. It is also very slippery, which I don`t
like. Rain destroys masonite quickly, so it is usually no good for
outdoor ramps. It works OK indoors, but creates a lot of dust when you
skate it. If you ever skate an indoor masonite ramp, you`ll notice
that it gets really dusty and hard to breathe after a while. Getting
that shit in your lungs is really bad for you. Some people swear by
masonite, but I avoid it.
NOTICE:
When putting a new layer of plywood on the surface (over an
existing layer), offset the seams. If the seams on the new layer line up
with the seams on the old layer, it`ll break up faster. By offsetting the
seams, you are avoiding this problem.