MCM^TM Joint Distribution Sub-base SB-2 Installation

Object : This method is required to install an MCM sub-base SB-2 on which an MCM cabinet will be bolted. Please note that all the sub-bases must be installed exactly where showed on the surveyor or engineered drawings indicating the joint distribution points. Then, following these easy steps will ensure a proper installation.

	1. Excavate according to the required depth, which is approx. 1825 mm (72 in.) below the specified final grade level. At the bottom of the excavation made, build-up a foundation of 150 mm (6 in.) thick of aggregates MG 20 compacted to 90% MP. Top of compacted foundation will then be at 1654 mm (65 in.) below specified final grade level.
	2. Lower sub-base on compacted foundation and align internal cross parallel to the street so that the side pictograms are correctly positioned : street side
	3. If necessary, remove the red cover and place a hand level on top of the sub-base. The final grade level of the sub-base must be planned so it is 76 mm (3 in.) above the grass or the finished surface. See level instructions on the sub-base. Maintain the sub-base plumb (on level) while filling in and compacting the crushed aggregates MG 20 around the bottom of the sub-base up to the level indicated as «top of aggregates» on the sub-base. Attain 90% MP compaction for every 8 in. (200 mm) layer. The sub-base is now ready to receive the distribution conduits and elbows.
	4. Install the various elbows required for all the different networks in the sequence indicated by the standards and specifications (a guide issued by the CERIU is available in french). Then, attach all the elbows solidly to the sub-base, using the rods in every section. Install caps at the end of the elbows and proceed to install the grounding rod and wire as required by the appropriate standards.
	5. After plugging all elbows at both ends with properly fitted caps, center a cylindrical form (Sonotube TM) with a 1200 mm (48 in.) diameter, around the sub-base. Make the appropriate cuts at the bottom of the tube for conduits. Block with aggregates the holes left around the conduits to avoid a loss of concrete. Keep all conduits away from the threaded rods and from the outside rim. Pour inside the tube flowable concrete of 1,0 to 1,8 Mpa, up to the height indicated on the sub-base side «top of flowable concrete».
	6. Once the concrete fill has solidified, cut the elbows at the specified height and fold back wires and cables into the sub-base so as to reinstall the red cover, if required. Red cover is fastened to the sub-base with four supplied bolts and can be doublepadlocked to prevent unauthorized access. Samples of flowable concrete used should be made on site to verify strength of concrete after 28 days.

* CERIU for Centre d'expertise et de recherche en infrastructures urbaines. Tel.: (514) 848-9885 http ://www.ceriu.qc.ca
Additional reference from MCM for the sub-base SB-1: Dwg # DC-SB1e(2005).pdf

» Download the document: HT-SB-2-V0.pdf (3.6MB)

MCM^TMJoint Distribution Cabinet Installation

Object : This method is required to install an MCM cabinet on top an MCM steel sub-base already in place (for installation instructions for sub-base, see sheet # HT-sub-base-V_). Following these five easy steps will ensure a proper installation.

Preparation	1. With sub-base installed, take off the safety (red) cover and then the plastic sleeves on the four threaded rods protruding from the sub-base. Insert a nut and a flat washer (found in a plastic bag in one of the upper compartments of the cabinet) onto each of the four threaded rods. Position the nuts so that each flat washer ends up leveled to the top of the sub-base (photo). The MCM sub-base is then ready to receive the MCM cabinet.
Levelling	2. Once properly oriented, slowly lower the cabinet onto the threaded rods. With a hand level resting on the top of the cabinet, use an open wrench to adjust the nuts (already installed in step 1) to achieve full contact between each flat washer and every leg UNDERSIDE, until the cabinet is perfectly level. Complete this step by checking BY HAND (without any tools) to make sure that the four nuts and washers are in full contact with the underside of each leg.
Hand tightening	3. Insert a washer and a regular nut on every threaded rod. Diagonally, tighten all nuts with an open (hand) wrench (approx. 60 ft-lb). The cabinet must remain perfectly level. IF NOT LEVEL, loosen these nuts and REPEAT STEP 2 to reestablish proper cabinet level.
Torquing	4. With a fastened and level cabinet, proceed to final tightening by diagonally torquing, starting with the last nuts installed in step 2, WITH A TORQUE WRENCH to 120 ft-lb. Insert a (half) jam nut on top of each of the tightened nuts and tighten the jam nuts with a HAND WRENCH. Important: DO NOT torque the jam nuts with a torque wrench. The cabinet will then be ready to receive the lamp post.
Skirt and bumper	5. Close all doors. Make sure all small lower doors (below large doors) are bolted shut. Then, unfold the neoprene skirt in order to surround the sub-base, make sure it is attached with tyraps to close all gaps. Install 2 half-bumpers using the nuts supplied. The assembled bumper must be freely resting on the small steel tabs emerging from the small lower doors. Lastly, check that the temporary cover on top of the cabinet is in place and properly sealed. Lock or bolt all doors.

» Download the document: HT-cabinet-V2.pdf (1.7MB)

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US Patent 6,167,673    Europe 1,062,399    Canada 2,494,243 et 2,266,151 et PCT.