IEC 60917-2-4:2010 specifies dimensions for mounting flanges of metric subracks or chassis that are to be mounted into 19 in cabinets or racks. Additional dimensions for subracks or chassis are according to the IEC 60917 series, and for 19 in cabinets or racks to the IEC 60297 series. EMC, seismic climatic and environmental requirements and tests, are defined in the IEC 61587 series.