shouldered arch(n = noun.artifact) - an arch consisting of a horizontal lintel supported at each end by corbels that project into the aperture;
is a kind of arch

abutment arch, alveolar arch, aortic arch, arch, arch brick, arch over, arch stone, arch support, basket-handle arch, bell arch, branchial arch, broad shouldered, broken arch, camber arch, corbel arch, diminished arch, drop arch, fallen arch, flat arch, four-centered arch, gill arch, gothic arch, haemal arch, hemal arch, horseshoe arch, in an arch manner, keel arch, lancet arch, maya arch, mayan arch, metatarsal arch, moorish arch, neural arch, ogee arch, pectoral arch, pelvic arch, pier arch, pointed arch, proscenium arch, rampant arch, roman arch, round arch, rowlock arch, safety arch, scheme arch, scoinson arch, sconcheon arch, segmental arch, semicircular arch, shouldered, skeen arch, skene arch, skew arch, steel arch bridge, straight arch, sunken arch, superciliary arch, three-centered arch, trefoil arch, trimmer arch, triumphal arch, trumpet arch, tudor arch, vertebral arch, zygomatic arch