Mature shade trees:  Our professional arborists are trained to safely prune your large shade trees to remove dead, dying or storm damaged branches. In locations where trees are not accessible with aerial lift equipment our climbing crews use a variety of specialized ropes, saddles, and ascenders as described in the ANSI (American National Standards Institute) Z133 safety standards for tree care operations. For trees accessible with equipment our crews will work out of one of our tall 75' aerial lift units. Pruning your mature trees is recommended every three to five years. Dead and dying branches are not only entry points for decay-causing micro organisms; there can also be large hazardous branches that have the potential to cause personal injury or property damage.