Trefoil Arches Trefoil Arches from Timothy Stoume Trefoil Arches A set of nine 30 ft long, 15ft tall arches, arranged in three triangle formations to create one 60ft equilateral triangle footprint. Each arch is built in four sections and each section uses three 4ft pieces of 2in X 6in pine. gLike Trefoil Arches A set of nine 30 ft long, 15ft tall arches, arranged in three triangle formations to create one 60ft equilateral triangle footprint. Each arch is built in four sections and each section uses three 4ft pieces of 2in X 6in pine. Event Design Share R 7 n Timothy Stoume Project Manager / Designer at Nova Sign Group Philadelphia, PA Follow Contact