What actually determines how much you get for your scrap?
When you bring scrap metal to a yard, two variables are critical: the current buying price and the weight of the material you deliver. While you can check the price by phone or online before you even set off, the weight — meaning the actual result of the measurement — is entirely outside your control if you do not know what kind of scale is being used or under what conditions the reading is taken. That is precisely why the type of weighing equipment and the validity of its certification have a direct impact on the amount you receive at the end of the transaction.
What is scale certification and what does compliance with the Office of Measures mean?
Certification is a formal process in which an authorised authority — in Poland this is the Central Office of Measures (GUM) or the regional offices of measures operating within its structure — verifies that a measuring device indicates values within permissible error limits. A scale that has undergone this process and holds a current certification is recognised as a measuring instrument for commercial purposes. This means one thing: a weighing result obtained on such a scale carries evidential weight — it can serve as the basis for financial settlement and, in the event of a dispute, provides a point of reference for any potential claims.
Scales that do not hold a current certification, or that are used in a manner inconsistent with the conditions of their type approval, cannot legally be used in commercial transactions. Their readings are not binding in any complaint or legal proceedings. In other words: if goods are weighed on a scale without valid certification, you have no instrument to challenge the result — even if it is clearly incorrect.
A 50-tonne drive-over (vehicle) scale — what does this mean in practice?
A vehicle scale, also referred to as a drive-over or platform scale, is a device designed to weigh entire vehicles together with their load. At the scrap metal yard at ul. Górecka 6 in Poznań, a scale with a 50-tonne capacity is installed, holding a current certification in accordance with GUM requirements. The weighing procedure is as follows:
- The supplier's vehicle drives onto the platform before unloading — the gross weight (vehicle + scrap) is recorded.
- After unloading, the vehicle drives onto the platform again — the tare weight (vehicle alone) is recorded.
- The difference between the two measurements is the net weight of the scrap delivered, which forms the basis for settlement.
The 50-tonne capacity allows even fully loaded heavy goods vehicles, articulated lorry combinations, or large containers of material to be weighed in a single pass. As a result, the reading is unambiguous and requires no estimates or conversion factors — only the measured weight counts.
The weighing receipt — a document that protects both parties
Every weighing on a certified drive-over scale concludes with the issue of a weighing receipt. This printout contains at minimum: the date and time of weighing, the gross, tare and net measurement results, the vehicle registration number, and the scale identifier. This document serves as proof of the measurement carried out — for both the scrap supplier and the scrap yard.
For the supplier, the weighing receipt functions in the same way as a till receipt from a shop: it confirms that for a specific weight of material you received a specific sum. If you transport scrap regularly — as a manufacturing company, workshop, industrial plant or demolition contractor — weighing receipts are a document required for internal record-keeping, settlement with business partners, and potential documentation within the BDO system (the Database of Products, Packaging and Waste Management). The absence of such a document, in the case of companies obliged to maintain waste records, can result in complications during inspections.
Charge scrap, cast iron, non-ferrous metals — does the type of material matter for weighing?
From the perspective of the weighing process itself, the type of material does not change the procedure — the scale measures mass regardless of whether the platform holds a vehicle loaded with charge steel scrap, machine cast iron, non-charge scrap, or non-ferrous metals such as copper, aluminium, brass or stainless steel. However, from a financial settlement standpoint, the precision of the measurement matters all the more when the price of the material being purchased is higher. Non-ferrous metals — particularly copper and brass — command prices many times higher per kilogram than steel, so every kilogram of measurement error translates into a real financial loss for the supplier.
This is why customers delivering copper, aluminium or brass scrap should take particular care to ensure that the transaction takes place on a device with current certification and that they receive a weighing receipt — not as a formality, but as concrete protection of their interests.
When scrap is collected by HDS vehicle or via a supplied container?
Not every supplier is able to bring scrap to a yard independently. Manufacturing companies, industrial plants and investors carrying out demolition projects frequently make use of a container placement service (in sizes ranging from 5 to 36 m³) or collection of material by HDS vehicle directly from the customer's site. In such cases, weighing takes place after the material has been brought to the yard at ul. Górecka — and here again the certified 50-tonne vehicle scale becomes a key element of the entire transaction, as it is its reading that determines the settlement amount.
If you are looking for a scrap yard closer to your location, check the available branches in the region: scrap metal yard Poznań Starołęka and Rataje, scrap metal yard Szamotuły, scrap metal yard Krotoszyn or scrap metal yard Nowy Tomyśl — the EURO-SCRAP Group serves suppliers throughout the Greater Poland region.
How to check whether the scale at a scrap yard holds current certification?
You are entitled to do so as a customer — and it is worth exercising that right. The validity of a scale's certification is confirmed by a certification mark (a sticker or seal indicating the year and the relevant weights and measures authority) placed directly on the device. You may also ask the yard's staff to present the certification document. If personnel at the scrap yard are unable to provide this information, you should treat it as a warning sign — without the ability to verify the scale's accuracy, you have no guarantee that the weighing result corresponds to the actual weight of the material you have delivered.
Summary: what you should take away from every scrap metal transaction
Whether you are selling a few hundred kilograms of steel scrap as a private individual or several dozen tonnes of cast iron as a business — you should leave every scrap metal transaction with two documents:
- A weighing receipt from a certified scale, containing the gross, tare and net measurement results.
- A scrap acceptance document or bank transfer confirmation confirming the settlement amount for the measured weight of material at the current buying price.
These two documents together create a complete transaction trail. For companies required to maintain records in the BDO system, a waste transfer document is also required — but that is a subject for a separate article. If you would like to learn about the full range of scrap metal and non-ferrous metal buying services, visit the full scrap metal and non-ferrous metals buying offer at EURO-SCRAP.
