Threshold Assemblies - Flush Applications These ramp assemblies consist of interlocking components, eliminating the need to weld joints. These assemblies can be configured to accommodate changes in floor conditions from 1/2" to 2 1/4". Pemko R.5F_ Flush Threshold Assembly Pemko R.5FMR_ Flush Threshold Assembly Pemko R.75F_ Flush Threshold Assembly Pemko R.75FMR_ Flush Threshold Assembly Pemko R1F_ Flush Threshold Assembly Pemko R1FMR_ Flush Threshold Assembly Pemko R1.25F_ Flush Threshold Assembly Pemko R1.25FMR_ Flush Threshold Assembly Pemko R1.5F_ Flush Threshold Assembly Pemko R1.5FMR_ Flush Threshold Assembly Pemko R1.75F_ Flush Threshold Assembly Pemko R1.75FMR_ Flush Threshold Assembly Pemko R2F_ Flush Threshold Assembly Pemko R2FMR_ Flush Threshold Assembly Pemko R2.25F_ Flush Threshold Assembly Pemko R2.25FMR_ Flush Threshold Assembly