The Board of Selectmen and the Planning Board will hold a joint public hearing at 7:15 p.m. Tuesday on the town’s proposed Housing Production Plan. Planning Director Stephen Costello said the plan is meant to be a guide for town leaders and to help defend against unwanted 40B affordable-housing proposals. If the plan is certified by the state, the town may be granted a one- or two-year moratorium for proposed affordable housing projects that it rejects that are appealed by developers to the state. The town must produce 62 affordable units for a one-year certificate or 124 affordable units for a two-year certificate. According to a draft of the plan, strategies for attaining the town’s affordable housing goals could include creating smart growth districts in Norwood Center; building elderly housing at Maguire Housing Authority property on Brookview Circle; or expanding the Washington Heights Family Housing development on Jefferson Drive.