All pipe joints shall be installed with an exterior joint
collar. The joint collar shall be MacWrap Exterior Joint Sealer as manufactured by Mar-Mac
Manufacturing Company or an approved equal and shall be installed according to the
manufacturer's recommendations. The collar shall consist of a band (*)" wide. The
band shall have an outer layer of polyethylene with an under layer of rubberized mastic
that is reinforced with a woven polypropylene fabric. There shall be a peelable protective
paper against the mastic that is removed when the collar is applied to the joint. Within
the collar two steel straps 5/8" wide shall be located 3/4" from each edge of
the band. The straps shall be in tubes that isolate them from the mastic and allow them to
slip freely when tightened around the pipe. The collar shall be designed so that when it
is applied around the joint the ends shall overlap at least 6" and when the straps
are secured a layer shall completely cover the straps protecting them from moisture and
rust. A bell hole shall be dug under the joint. After removing the protective paper, the
band shall be placed around the pipe, mastic side to the pipe and spanning the joint, with
the overlap at the top of the pipe. The steel straps shall be secured with the proper
tools. The closing flap shall cover all remaining exposed strap.
*9" width is usually wide enough for pipe with smooth
outside walls in diameters up through 48" I.D. 9" width normally is sufficient
for all smooth outside wall pipe. 9" and 13" widths are used on pipe with
modified bell or full bell joints depending on pipe and bell size.
Other quality products for the
construction industry by Mar-Mac Manufacturing Company:
- Mar-Mac Diapers, forms for grouting pipe joints
- Tie wires for tying re-bars and concrete forms
- Wire insulation supports
 |
Mar-Mac also manufactures complete lines
of Wire and Wire Products and Protective Clothing. Call for more information.
MAR-MAC MANUFACTURING CO., INC.
P.O. Box 278, McBee, South Carolina 29101
Telephone 843/335-8211 Fax 843/335-8599
http://www.marmac.com/Toll Free Free 845-6962
(except S.C.) |
