Detail of frame for metal lids

 Detail of frame for metal lids in DWG File, laminate top 1/8 "thick, intermediate refuerso angle 3/4 "x 1/8" thick, lid reinforcement @ 70 cm with angle of 3/4 "x 1/8" of thickness, gap for channel passage (the size will depend on the type and size of the gutter) etc detail.