100-Ton Weighbridge Installation for Mr. Green Africa, Nairobi
When Mr. Green Africa — Nairobi's pioneering plastic-recycling company — needed to weigh incoming collection trucks accurately at its growing processing facility, it partnered with Scalestech to design, supply and install a fully automated 100-ton digital weighbridge. This case study walks through the full installation, from the initial site survey at the company's Mombasa Road facility to calibration, handover and the results the new weighbridge delivers for one of Kenya's most recognisable waste-management operations.
The Challenge: Weighing Trucks Accurately in a Growing Recycling Operation
Manual and Unreliable Weight Verification
Like many fast-growing waste-management and recycling operations in Nairobi, Mr. Green Africa's facility handles a continuous flow of vehicles — from small pickups delivering sorted plastic from local collection points to larger trucks moving bulk material between the plant and its customers. Without an on-site, automated weighbridge, verifying vehicle loads relies on manual processes that are slower, harder to audit, and more prone to error at scale.
Why Mr. Green Africa Chose Scalestech
Local East African Weighbridge Expertise
Scalestech has installed and serviced weighbridges for clients across Kenya's transportation, mining, agriculture, cement and waste-management sectors, giving the team direct experience with the civil-works, soil and traffic-flow challenges specific to Kenyan sites — from Nairobi's black cotton soil to high-traffic road frontages like Mombasa Road.
ESIT Weighbridge Technology
For this installation, Scalestech specified an ESIT digital weighbridge — a steel-deck platform paired with high-precision load cells and a digital indicator, chosen for its durability under continuous heavy-vehicle traffic and its compatibility with Scalestech's weighbridge management software for automated ticketing and reporting.
The Solution: 100-Ton ESIT Digital Weighbridge
Weighbridge Specifications
Spec | Detail |
|---|---|
Capacity | 100 tons |
Load cells | Esit Digital load cells |
Size | 3m by 18m |
Control | Dedicated on-site control room with weighing indicator and reporting PC |
Security | Integrated CCTV surveillance covering the weighing deck and approach |
Software | Esit Spwin Software |
Installation Process: Step-by-Step
1. Site Assessment & Planning
Every Scalestech weighbridge installation starts with a full site survey. Our engineers visited Mr. Green Africa's recycling facility at the Mombasa Road and Enterprise Road junction to assess truck turning circles, approach and exit gradients, drainage, and how a new weighbridge would integrate with the plant's existing inbound and outbound plastic-waste logistics. Because the facility runs a continuous stream of collection trucks bringing in post-consumer plastic from informal waste pickers and trading hubs across Nairobi, positioning the weighbridge to avoid queuing back onto Mombasa Road was a key planning constraint from day one.
2. Groundbreaking & Civil Works
With the layout confirmed, our civil works team carried out excavation and groundwork preparation, including soil stabilisation and drainage planning.
3. Foundation Construction
A reinforced concrete foundation was built and engineered to support the full 100-ton capacity of the ESIT weighbridge deck, with reinforcement and curing schedules matched to the expected daily truck traffic at the plant. Getting this step right the first time is what protects the weighbridge's calibration accuracy over years of heavy use, rather than months.
4. Deck & Load Cell Installation
The ESIT steel weighbridge deck was installed and high-precision load cells fitted beneath it to capture accurate weight readings across the full width and length of the platform, not just at the centre. This matters for a recycling operation where trucks of varying sizes — from small pickups delivering sorted plastic to larger collection trucks — all need to weigh in consistently.
5. Weighbridge Software Configuration
ESIT SPwin weighbridge management software was deployed to automate data collection, generate weight tickets, and produce daily, weekly and monthly reporting. This gives Mr. Green Africa's operations team a digital record of every truck movement in and out of the plant, replacing manual weight logs that are slower and more error-prone.
6. Calibration & Testing
Before handover, the weighbridge was calibrated using certified test weights and checked against Kenyan legal metrology standards to confirm measurement accuracy across its full load range. Calibration isn't a one-time event — Scalestech recommends periodic recalibration (see the Compliance section below) to keep the weighbridge within tolerance as it wears in under daily use.
7. Handover & Operator Training
Once testing was complete, Scalestech handed the weighbridge over to Mr. Green Africa's operations team with hands-on training on the weighing software, ticket printing, and day-to-day troubleshooting, plus a maintenance schedule so the system keeps performing reliably long after our engineers leave site.
The Outcome: Results for Mr. Green Africa
The 100-ton weighbridge is now a fully operational, automated part of Mr. Green Africa's Nairobi facility, giving the team a fast, consistent, and auditable weight reading for every truck that enters or leaves the plant. Automated ticketing and reporting replace manual weight logs, CCTV integration adds a verifiable record for any disputed load, and the calibrated, KEBS-aligned measurement process supports accurate supplier payments and customer billing — the two areas where weighing accuracy matters most for a recycling business built on fair-trade sourcing from thousands of individual waste collectors.