HomeMy WebLinkAboutTree Protection Fencing and Signage Detail
PROTECTION MEASURES DURING CONSTRUCTION:
1. Chain link fencing is required around the drip line of
trees required to be retained, or around required tree
protection tracts/easements.
2. The fence shall be a minimum of 6-feet high.
3. Steel posts shall be driven at a depth to ensure the fence
remains in an upright position for the duration of the
development.
4. Tree protection signage shall be placed at intervals of no
more than 20-feet along the entire fence. See link below
for signage specifications.
5. Storage, fill, excavation, earth compaction, or dumping
of liquids or materials is prohibited in fenced area.
6. Utilities or impervious surface installation is prohibited
within the tree drip line.
7. Grade changes are prohibited within the tree drip line.
8. Removal of the existing vegetation within the drip line of
protected trees is prohibited.
9. All areas within the required fencing shall be covered
evenly with a minimum of 3-inches of bark mulch, except
in areas where mulch will adversely affect protected
ground cover plants.
10. For protected trees subject to a land use decision, the
applicant shall retain an ISA certified arborist or ASCA
certified consultant to supervise fence installation,
monitor tree health, and prune trees.
Planning Division
1055 South Grady Way
Renton, WA 98057
425-430-7200 | www.rentonwa.gov PAGE 1 OF 3
TREE PROTECTION ZONE (TPZ) FENCE DETAIL
REQUIRED
SIGNAGE
6-FOOT
CHAIN LINK
FENCE
MAINTAIN
EXISTING
GRADE
UNDISTURBED
VEGETATION
WITH 3-INCHES
MULCH
DRIVEN STEEL
POSTS
TREE
PROTECTION
SIGNAGE
INSTRUCTIONS:
11. Install tree protection signage at intervals of no more
than 20-feet along the entire fence.
12. The size of each sign must be a minimum of 18” x 2 4”.
13. Fill in the approved permit number on the front side.
14. Plastic laminate the sign for weather resistance.
15. Affix the filled-in and laminated sign to the tree
protection fencing using zip or twist ties, wire, or twine.
16. Place sign on fencing so it is visible to construction
personnel and, to the greatest extent possible, from the
street.
17. Keep the sign in readable condition for the entire
duration of the project.
18. For protected trees subject to a land use decision, the
applicant shall retain an ISA certified arborist or ASCA
certified consultant to supervise fence installation,
monitor tree health, and prune trees.
UNDISTURBED
VEGETATION
WITH 3-INCHES
MULCH
TREE PROTECTION SIGNAGE INSTRUCTIONS
Planning Division
1055 South Grady Way
Renton, WA 98057
425-430-7200 | www.rentonwa.gov PAGE 2 OF 3
6-FOOT
CHAIN LINK
FENCE
MAINTAIN
EXISTING
GRADE
DRIVEN STEEL
POSTS
REQUIRED
SIGNAGE
TREE
PROTECTION
SIGNAGE
TREE PROTECTION
AREA
TREE PROTECTION FENCING IS A REQUIREMENT OF APPROVED PERMIT NUMBER:
____________________________
PROTECTIVE FENCE MUST BE KEPT AT THE TREE’S DRIP LINE OR AS SHOWN ON APPROVED PLANS.
THE FENCING MUST REMAIN IN PLACE THROUGHOUT CONSTRUCTION.
DO NOT REMOVE OR RELOCATE THIS FENCE!
NO WORK, EXCAVATION, STORAGE, OR DUMPING IS ALLOWED BEHIND THIS FENCE.
FAILURE TO FOLLOW THE REQUIRED TREE PROTECTION MEASURES MAY RESULT IN A STOP WORK
ORDER AND CIVIL PENALTIES.
TO REPORT A SUSPECTED VIOLATION, CONTACT CODE ENFORCEMENT (425) 430-7373.
BE PREPARED TO PROVIDE THE PERMIT NUMBER AND/OR THE SITE ADDRESS.