The collimation system intercepts the beam halo by absorbing part of the induced shower and retaining the rest in the warm segment of the ring in order to protect the downstream superconducting (SC) magnets from quenching. The FCC-hh betatron cleaning insertion region (2.7 km long) features primary collimators (TCP), secondary collimators (TCSG) and active absorbers (TCLA), whose design have been inspired by the LHC and are required to sustain - for at least 10 seconds - the impact of about 12 MW, corresponding to a beam lifetime of 12 minutes. Particle tracking simulations followed by shower simulations represent a proven tool for quantifying the power deposition on the concerned elements along the line. In this study, short TCPs were considered in order to reduce the power deposition by diminishing the shower development inside the absorbing material. Moreover, thick jaws were implemented aiming to prevent an excessive direct power deposition density in the cooling system. A layout option excluding the most loaded TCP was also investigated. Encouraging results were achieved, both in terms of collimator resistance and warm magnet protection, and input was provided for a first thermomechanical analysis.