“For an Itron MC4 vehicle, the pickup truck’s roof is not merely sheet metal. It is part of the radio system. A steel roof provides both magnetic attachment and an effective ground plane, while aluminum, glass and composite roofs require an engineered antenna solution.” – MJ Martin
Canadian Municipal Fleet Context
For Canadian municipalities using an Itron Mobile Collector 4 system, the pickup truck is not merely transportation. It becomes part of the radio system. Itron’s portable configuration uses a magnetic-mount antenna base, while its permanent configuration uses a through-roof base. The MC4 family collects water, gas and electricity reads, so a fleet decision that appears mechanical can directly affect route completion, read reliability and the ability to move equipment between vehicles.
Why Roof Material Matters
A magnetic antenna needs two things: physical retention and an effective metal ground plane. Think of the roof as the sounding board beneath a tuning fork. The antenna may produce the signal, but the surrounding metal helps shape its radio-frequency behaviour. Itron specifies a flat metal mounting area, roof metal between 0.02 and 0.04 inches thick, separation from other antennas and metal structures, and a ground-plane diameter of approximately three feet for best performance. A small steel patch attached to an aluminum, glass or composite roof might hold the magnet, but it does not automatically reproduce the required RF environment.
Canadian Pickup Findings
Most conventional pickups remain suitable. The magnet-friendly group includes the Ford Maverick and Ranger, Chevrolet Colorado and conventional Silverado models, GMC Canyon and conventional Sierra models, Ram 1500, 2500 and 3500, Toyota Tacoma and Tundra, Nissan Frontier, Honda Ridgeline and Hyundai Santa Cruz. Ford’s specifications describe the Maverick as having mild-steel body panels. Toyota describes the Tundra cabin as ultra-high-strength steel, despite its aluminum hood and front doors. Nissan’s Canadian parts catalogue identifies the Frontier roof panel as steel, while Honda documents extensive high-strength-steel construction in the Ridgeline body and roof structure.
The important exceptions are Ford’s aluminum-bodied F-150, F-150 Lightning and Super Duty pickups. Ford’s F-150 roof-repair procedure specifically addresses aluminum body panels, making a portable magnetic base unsuitable. The Jeep Gladiator’s removable soft top or sheet-moulding-composite hardtop is also non-magnetic. The Rivian R1T and Tesla Cybertruck use glass roof surfaces, while the GMC Hummer EV Pickup uses removable Sky Panels. Chevrolet Silverado EV and GMC Sierra EV require trim-by-trim verification because fixed-glass roofs are available.
Procurement Recommendation
A municipality should place roof compatibility directly in the tender specification. Require an uninterrupted ferromagnetic roof area large enough for the intended antenna arrangement, exclude panoramic roofs and sunroofs that compromise the ground plane, and require a physical magnet test on the exact proposed trim before acceptance. The test should be followed by an installed-system route trial, because magnetic attraction proves attachment, not RF performance. Where an aluminum, glass or composite-roof truck is otherwise preferred, use an Itron-approved permanent installation or an engineered external mounting structure rather than an improvised steel plate.
The BackRack Alternative
The popular BackRack, often called a headache rack, can provide a practical antenna-mounting solution for pickups with aluminum, glass or composite roofs. The standard BackRack is manufactured from heavy 12-gauge steel, allowing a horizontal steel antenna plate to be securely bolted or welded across its upper structure. The plate should be flat, rigid and positioned above the pickup box, with the antenna located near its centre and clear of the cab, warning lights and other metal obstructions.
The mounting plate must do more than hold the magnet. It must also function as the antenna’s RF ground plane, much like the metal roof it replaces. Itron recommends a ground-plane diameter of at least three feet for best performance, with approximately 39 inches being preferable for a 900 MHz signal. The plate should therefore be made as large as the rack and vehicle geometry reasonably permit, rather than being only slightly larger than the magnetic base. Short, wide bonding straps should electrically connect the plate to the steel rack, pickup box and vehicle chassis. Paint and powder coating must be removed at the bonding points and protected against corrosion after assembly.
This arrangement is especially useful when installing Itron Side-Looker antennas, which require a flat horizontal metal mounting surface and use strong magnetic bases. However, a BackRack installation should be treated as an engineered alternative rather than an automatic substitute for a steel roof. Antenna spacing, cable routing, vehicle height, RF exposure distances and meter-reading performance must be verified through a field route test before the truck enters regular municipal service.
Questions for Decision Makers
Is rapid transfer of the MC4 between vehicles more valuable than a permanent installation? Will the truck carry one integrated antenna or additional side-lookers? Should fleet standardization favour the simplest steel-roof work truck, or should fuel economy, electrification and operator comfort justify a more complex antenna solution? Those answers should be settled before the vehicle tender is issued, not after the trucks arrive.
About the Author:
Michael Martin is the Vice President of Technology with Metercor Inc., a Smart Meter, IoT, and Smart City systems integrator based in Canada. He has more than 40 years of experience in systems design for applications that use broadband networks, optical fibre, wireless, and digital communications technologies. He is a business and technology consultant. He was a senior executive consultant for 15 years with IBM, where he worked in the GBS Global Center of Competency for Energy and Utilities and the GTS Global Center of Excellence for Energy and Utilities. He is a founding partner and President of MICAN Communications and before that was President of Comlink Systems Limited and Ensat Broadcast Services, Inc., both divisions of Cygnal Technologies Corporation (CYN: TSX).
Martin served on the Board of Directors for TeraGo Inc (TGO: TSX) and on the Board of Directors for Avante Logixx Inc. (XX: TSX.V). He has served as a Member, SCC ISO-IEC JTC 1/SC-41 – Internet of Things and related technologies, ISO – International Organization for Standardization, and as a member of the NIST SP 500-325 Fog Computing Conceptual Model, National Institute of Standards and Technology. He served on the Board of Governors of the University of Ontario Institute of Technology (UOIT) [now Ontario Tech University] and on the Board of Advisers of five different Colleges in Ontario – Centennial College, Humber College, George Brown College, Durham College, Ryerson Polytechnic University [now Toronto Metropolitan University]. For 16 years he served on the Board of the Society of Motion Picture and Television Engineers (SMPTE), Toronto Section.
He holds three master’s degrees – in business (MBA), communication (MA), and education (MEd). As well, he has three undergraduate diplomas and seven major certifications in business, computer programming, internetworking, project management, media, photography, and communication technology. He has completed over 80 next generation MOOC (Massive Open Online Courses) [aka Micro Learning] continuous education programs in a wide variety of topics, including: Economics, Python Programming, Internet of Things, Cloud, Artificial Intelligence and Cognitive systems, Blockchain, Agile, Power BI, Big Data, Design Thinking, Security, Indigenous Canada awareness, and more.
Martin in a volunteer, a photographer, a learner, a technologist, a philosophizer, and a romantic optimist.