this looks like it might be it....
http://www.ludlowquiltandsew.co.uk/S...lt_Patter.html
or at least it will point you in the right direction (this is actually for blocks that fit together to make the spiderweb quilt)
looks like the spider web done in the OP would be done via strip piecing and cutting into triangles
(sheesh I almost sound like I know what I am talking about LOL)