A Technical Report from The Bartlett Tree Research Laboratories
Props are rigid structures anchored in the ground that support tree branches or trunks from below. Props are used under horizontal or downward growing branches to keep them off of the ground or structures or to keep them above pedestrians’ heads or vehicles. They may also be used to provide supplemental support to leaning tree trunks.
Props can be an effective means for maintaining clearance height of branches. They should be designed to hold the intended load while not restricting future growth. Props should be maintained and replaced if they deteriorate or no longer function as designed.