Spanish to English Tech/Engineering Metallurgy / Casting scrap metal

This is from a technical specification for a scrap metal handling subcontract. It is part of a list of types of scrap collected from the rail line (tren de carril) of a steelworks:

Muestras del caballete (pueden llegar a 3m. de longitud):
Se evacuan sobre camión plataforma por la puerta 11 (La carga se realiza por medios aportados por X)

Note: the previous items on this list are 'blooms achatarradas' and 'barras perdidas', and the following ones: 'carriles largos enfriaderos' and 'trozos largos de carriles'.