starch thickener stiffener sizing stiffening arrowroot brace support prop reinforcement buttress stay beam bracket mount shore truss column joist stanchion strut batten bolster bracer pole post rod spur underpinning mounting sprag arm band bar bearing block boom cantilever girder guy lever mainstay rafter rib skid splint staff stave sustainer pillar shaft upright pier piling stick pile vertical leg crutch stake pedestal pilaster abutment base frame plinth mast substructure paling spar footing pale palisade crosspiece standard stilt stud rest foundation platform timber backing picket bulwark plank spike rail baluster trestle pylon bed crossbar jamb newel holder rack stand framework hold structure