Modern Tents
Modern Tents
http://en.wikipedia.org/wiki/Tent
Parts of a modern tent
The tent fabric or tent inner comprises the roof, walls, and (if one
exists) the sewn-in groundsheet of the tent.
The poles provide structural support. They may be collapsible for easy
storage. Some designs use rigid poles, typically made of metal, or sometimes
wood. Other designs use semirigid poles, typically made of fiberglass,
or sometimes of special metal alloys.
The rain fly, outer, or flysheet, is a sheet of fabric that is attached
over the top of the inner. It is designed to make minimal contact with
the tent fabric itself, and sometimes has a small pole of its own. The
flysheet fabric is usually waterproof and may be made of canvas, nylon,
or a more modern breathable material. Minimizing contact keeps the inner
dry even if the outer is wet, and provides a layer of insulation.
Stakes or pegs are used to fasten the tent to the ground. Some are attached
to ropes (guys) that pull outward on the flysheet to give the tent additional
stability. Others are used to anchor the bottom edge of the flysheet
and inner to the ground.
Modern tent types
A dining fly or bivouac is the simplest form of tent.
It consists of a single rectangular sheet of material. Two opposite
sides are held up in the middle by metal poles, or sometimes trees.
The tops of the poles are attached to guy lines, the other ends of which
are attached to stakes, in order to keep the dining fly from falling
in on itself. Dining flies are not intended as shelter for people. Their
primary purpose is to store gear and protect it from rain. (Campers
may choose not to store it in their own tents if those are too small.
Also, gear tends to have odors that attract animals.) A particularly
large dining fly may be used for dining purposes, but not for cooking,
due to fire-safety considerations.
An A-frame tent is so-called because the poles are
put together to form an 'A' shape at either end. The tent inner usually
includes walls and a sewn-in groundsheet. A-frame tents also usually
have flysheets or outers. They are comparatively difficult to set up,
particularly because of the large number of stake anchor points, but
very easy to take down.
A cabin tent is similar to an A-frame tent, but larger
and taller. It has a small rigid pole in each corner hold the side walls
in a vertical position; each of these poles is secured with its own
guy line. These tents are somewhat more difficult to take down than
A-frames, and considerably more difficult to pitch. A further modification
of this design is the use of an extensive metal framework that allows
the cabin tent to stand without any guy lines. These tents usually have
durable canvas tent fabrics, and may be attached to permanent floors,
typically wooden. These freestanding tents may be found at permanent
camps, where they are usually pitched once for the entire camping season.
However, they are very heavy and not very portable.
The dome tent is a popular basic design. It differs
fundamentally from the previous designs in that its poles must be flexible,
and run along the corners from the floor to the peak and back down to
the floor on the opposite side. They differ from A-frame tent poles
in that they run outside the tent fabric, which is attached to the pole
framework by sleeves, and sometimes also clips. Dome tents are more
difficult to set up than A-frames, but easier to take down. They do
not require stakes for structural integrity. They are more resistant
to wind-induced collapse than cabin tents, but strong winds may bend
the poles to the breaking point, or roll the tent if it is not staked.
The basic dome design has been modified extensively, producing tents
with three poles, tents with irregularly-shaped bases, and other unusual
types.
· Tunnel tents are another possibility. Compared
with dome tents, they offer more usable internal space for the same
ground area, but almost always need stakes and guy lines to stay upright.
Tunnel tents use the same type of flexible poles as dome tents. Typically,
they use three poles, arranged as three parallel hoops, with tent fabric
attached to form a tunnel. The most common designs have a sleeping area
at one end and a porch/storage area at the other.
· Hybrid dome/tunnel tents are now common. The
basic dome tent provides the sleeping area. One or two hooped poles
to one side are linked by a tunnel to the dome to provide a porch.
· Hammock tents, one-person sleeping tents arranged
around a hammock, also exist and are favored by some campers in warm
weather.