(a) General.
(1) Set base plumb and level. Align manhole invert with pipe invert.
(2) Secure pipe connectors to pipe in accordance with manufacturer's recommendation.
(3) Clean bells and spigots of foreign material that may prevent sealing. Unroll the butyl sealant rope directly against base of spigot. Do not stretch. Follow manufacturer's instructions when using O-ring seals.
(4) Set precast components so that steps align.
(5) Plug lift holes using a non-shrink grout. Cover with a butyl sealant sheet on the outside and seal on the inside with an application of an epoxy gel 1/8-inch thick extending two inches beyond the opening.
(6) Set manhole frames to grade with grade rings. Seal joints between cone, adjusting rings, and manhole frame with butyl sealant rope and sheet.
(7) Apply external seal to the outside of joint.
(8) Finish the interior by filling fractures greater than one-half-inch in length, width or depth with a sand cement mortar.
(9) Clean the interior of the manhole of foreign matter
(10) Ring and cover shall be installed in accordance with standard details.
(11) Where concern for hydrogen sulfide gas or as directed by the city, manholes shall be coated with an interior coating approved by the city.
(Ord. of 11-7-16, No. 10-16)