- USP Lumber Connectors, designer and manufacturer of a full range of joist hangers and other framing connectors for wood-to-wood and wood-to-concrete applications for high wind resistance, earthquake resistance, engineered lumber, plated truss, glulam and standard lumber. USP's expansive product line includes joist hangers, lumber connectors, framing hardware, high wind resistance, framing ...www.hughesmfg.com