This may require the installation of an area of dense concrete (cast in-situ or pre-cast), known as a padstones to spread the load.
Cewch ddewis cynnwys gât safonol (metel neu bren) i alluogi mynediad at yr ardal creu coetir, a gatiau (gât wiced hunan-gau) ar gyfer hawliau tramwy cyhoeddus a llwybrau caniataol.