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We present the combination of ALMA-IMF and single-dish continuum images fromthe Mustang-2 Galactic Plane Survey (MGPS90) at 3 millimeters and the BolocamGalactic Plane Survey (BGPS) at 1 millimeter. Six and ten out of the fiffteenALMA-IMF fields are combined with MGPS90 and BGPS, respectively. Thecombination is made via the feathering technique. We used the dendrogramalgorithm throughout the combined images, and performed further analysis in thesix fields with combination in both bands (G012.80, W43-MM1, W43-MM2, W43-MM3,W51-E, W51-IRS2). In these fields, we calculated spectral index maps and usedthem to separate regions dominated by dust or free-free emission, and thenperformed further structural analysis. We report the basic physical parametersof the dust-dominated (column densities, masses) and ionized (emissionmeasures, hydrogen ionization photon rates) structures. We also searched formulti-scale relations in the dust-dominated structures across the analyzedfields, finding that the fraction of mass in dendrogram leaves (which we labelas "Leaf Mass Eficiency", LME) as a function of molecular gas column densityfollows a similar trend: a rapid, exponential-like growth, with maximum valuesapproaching 100% in most cases. The observed behaviour of the LME with gascolumn is tentatively interpreted as an indicator of large star formationactivity within the ALMA-IMF protoclusters. W51-E and G012.80 stand out ascases with comparatively large and reduced potential for further starformation, respectively.

ALMA-IMF VIII -- Combination of Interferometric Continuum Images with Single-Dish Surveys and Structural Analysis of Six Protoclusters