HomeMy WebLinkAbout(1) EVERGREEN WALL REPORT DRAFT 11-3-2021 - FINALJJ e f f r e y T. B u t l e r , P.E .,P .C .
20 6 Lincol n Street
Ri ve r hea d , New York 1 19 01
631-20 8-885 0
Licensed Professional Engineer
September 24, 2021
EVERGREEN MACRO GRAVITY RETAINING WALL SYSTEM FOR:
STRONG’S YACHT CENTER
5780 WEST MILL ROAD, MATTITUCK, N.Y.
The Evergreen Macro Gravity Retaining Wall System proposed by this office
for the Strong’s Yacht Center is a precast concrete retaining wall system that has a
proven track record around the world for over 35 years.
The wall system consists of numerous 16’ modular units that stack together
for form a cohesive retaining wall that gets planted to disappear into the
environment. The precast concrete modular units are fabricated off-site (Bellport,
New York) and shipped for assembly on-site. The modular units are easily handled
and placed in pre-determined locations to lock together and create a wall with a
safety factor of greater than 2.0, with 1.5 being the code minimum. Once in place
and backfilled, nature plants the trays built into the wall to create a “green” wall over
2-3 years. The aesthetic and environmental characteristics of this wall system,
combined with the design philosophy, make this wall system an ideal application for
this project.
For every Evergreen Wall system, strict quality control with continuous third
party inspections for both the off-site fabrication and on-site installation are
mandatory code requirements as well as Evergreen standard practice for achieving
the design intent for safety factor, aesthetic beauty and job site safety. As part of the
process, a shop drawing for each modular unit will be generated and approved by
the Engineer of Record. There will be a continuous third party inspection process in
place that will follow the shop drawings from off-site fabrication to on-site assembly,
including rebar inspection and concrete testing. Passing of the 28 days concrete
test is a mandatory requirement for shipping each modular unit for assembly on-site.
In our initial investigation into using this retaining wall system, extensive soil
borings were conducted to assure design compatibility with the native soils
properties and ground water elevation. We have concluded that the design
principles utilized for this gravity wall system are a perfect match for the Evergreen
Macro Gravity Retaining Wall System.
I have attached several documents from Evergreen Walls, Inc. that were
prepared by Dr. Felix P. Jacklin, P.E. Dr. Jacklin is a principle at Evergreen Walls,
Inc. and is widely acclaimed and highly honored within the industry. Our firm has
been working with Dr. Jacklin on this wall for this site from the very beginning. His
involvement will continue with design development followed by construction
drawings and random inspections to support our continuous inspection process.
The documents attached include:
1. Evergreen Brochure, which lists similar projects, including two on Long Island
2. Evergreen Retaining Wall Typical Section and Notes
3. Evergreen Retaining Wall Specifications
4. Evergreen Retaining Wall Minimum Design Requirements, Fabrication
Requirements, Excavation Requirements, Site Preparation Requirements,
Minimum Requirements for Transportation and Unloading and Minimum Wall
Erection Requirements.
Respectfully Submitted,
Jeffrey T. Butler, P.E
Attachments
Recent Install at Huntington, New York
• Designed /
lied Evergreen Maxi wall under rails, 200,000 s.f. Kansa
ATTACHMENT 1
ATTACHMENT 2
ATTACHMENT 3
ATTACHMENT 4