Close-up View Exterior View Interior View Ornamental Street Tree Fence Specification  This ornamental iron fence specification is the Urban Forestry Administration's (UFA) standard for street tree fencing. The fence shall be installed by a licensed contractor for UFA approved streetscape development projects and meet or exceed the following specifications: ASTM A-787, ASTM A-653, ASTM A-607. Materials: Posts - above grade:  1" x 1" x 1/8" tubing, 18" in length Posts - below grade:  ¾" solid steel bars, 18" in length Top rail embellishment:  1" x 1/8" flat steel channel Top rail:  2" molded steel bars Mid rail:  1" x ½" x 1/8" steel channel punched to accept pickets Bottom rail:  1" x ½" x 1/8" steel channel punched to accept pickets Pickets:  ½" x ½" solid steel bars O-Rings:  4 ½" tubing Finish:  all materials are welded and primed with 1 coat of Red Oxide primer and 1 coat of Black Satin paint (Sumter Coating) mixed with primer Fabrication and Installation: Fence shall be 3-sided unless otherwise specified, open side facing the curb Top-to-mid rail spacing – 5.75” o.c. Mid-to-bottom rail spacing – 8” o.c. Bottom rail shall sit approx. 3” above grade surface Post-to-picket spacing – 5.25” o.c. Picket-to-picket spacing – 5” o.c. Space O-ring tubing according to picket and post locations; all O-rings shall be welded to adjacent pickets, posts, and rails Weld 1” x 1” x 0.125” post tubing at ends and corners and weld an additional post along the length at mid-point. If tree box length exceeds 12’, posts should be welded every 4’ along length To provide below grade support in concrete, weld ¾” solid steel bars to all 1” x 1” x 0.125” post tubing To deter seating, weld 1” x 0.125” flat steel channel to 2” top rail For existing tree boxes, openings must be measured prior to fabrication to ensure that fences will fit just inside the boxes and side panels must be fabricated with a setback of approx. 6” from back edge of existing curb to allow sufficient room for car doors to swing For new tree boxes installations, fence dimensions shall be standardized based on length and width of proposed openings (e.g. 4’ x 9’, 6’ x 10’, etc.), however, the setback for the side panels shall remain consistent at 6” from back edge of curb to allow sufficient room for car doors to swing Use Sonotube forms as per manufacturer’s specifications to set concrete for footings. Concrete footings shall be approx. 10” wide by 24” deep. Concreting shall be performed in accordance with the manufacturer’s specifications. Requirements: Strength: 3000 psi with a slump of 3 Air entrainment: 5% to 8% Aggregate size: ¾" max Mortar compressive strength at 28 days: 32 MPa Meets ASTM C 150, Type 1 Finished concrete shall be two (2) inches below existing grade and pitched to direct water away from posts.