Hennepin County

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PROJECT QUESTION: Junction box special - Sheet SL-5 calls out a polymer concrete junction box and notes the minimum size as 10-foot L x 4.5-inch H x 4-inch D. the spec section SB-25 specifies that all sidewall or flush mounted junction boxes must be removable flange galvanized cast iron with checkered cast iron covers. Are the boxes to be polymer or cast iron?

Question:
Junction box special - Sheet SL-5 calls out a polymer concrete junction box and notes the minimum size as 10-foot L x 4.5-inch H x 4-inch D. the spec section SB-25 specifies that all sidewall or flush mounted junction boxes must be removable flange galvanized cast iron with checkered cast iron covers. Are the boxes to be polymer or cast iron?

Response:
See specification section SB-25 for the conduits and junction boxes associated with the conduit in the inner barrier only. See specifications SL-1 & SL-2 and sheet SL5 for the polymer concrete junction box that is to be installed in the pilasters for the roadway & navigation lighting systems.