I need a pyramid tent for four people for hiking in Alaska this summer. Since two of us share a quilt we need enough room on either side of the center pole. I'm wondering how large a pyramid I need.
The silnylon I purchased is 60 3/4 inch wide, so following the standard design I could make the pyramid sides about 2 x 59 1/4 = 118 1/2 inches wide, accounting for 1/2 inch flat-felled seam allowances (one where two triangles meet to form a side, and two more where two sides meet at a corner ridgeline).
Is a pyramid with 118 1/2 inch sides large enough for four people? I plan to use a fairly large pole, 75 inch (7.5 ounces, left over from an old tent), or joined trekking poles when I want minimum weight.
If not, I can see two ways to make the sides larger, and am interested in feedback and other ideas. My concern is how the stresses distribute themselves along the sides and seams under wind load.
One way is to cut the largest right-angle triangles possible out of my fabric, then add a long, thin filler piece between them to make one big (isosceles) triangular side. From one corner the side would be made up of a triangle, then a filler piece, then another triangle. There would be no vertical seam running down the center of a side, instead there would be two parallel seams maybe a foot apart straddling the center line of a side.
Alternatively, I could cut large clipped triangles (corners missing), then add small triangles to make up the corners, yielding large, complete right-angle triangles, then join these to make the side. From one corner you'd see a small filler triangular corner, a large piece, another large piece, then another small filler triangular corner. Here there would be a vertical seam down the center of each side, and two small vertical seams near the corners.
Kindly send me your thoughts on required size and how best to proceed.