Use the pier Foundation is not recommended where there are movable or weak soils such as peat or water-saturated clayey soils. Do not use this type of Foundation and in areas where there has been a sharp drop.
Ilapat ang pier pundasyon ay hindi inirerekomenda kung saan may gumalaw o mahina soils, tulad ng pit o water-puspos clay soils. Hindi mo dapat gamitin ang ganitong uri ng pundasyon, at sa mga lugar kung saan may isang matalim vertical drop.