Nortrax
190 David Manchester Road, Ottawa
16 May 2014
32 01 90.33
TREE AND SHRUB PRESERVATION
Page 1
PART 1 - GENERAL
1.1 SUMMARY
.1
Section Includes:
.1
.2
Related Requirements
.1
1.2 REFERENCES
.1
1.4 DELIVERY,
STORAGE AND
HANDLING
Section 32 93 45 - Tree Pruning.
Canadian Standards Association (CSA International).
.1
1.3 DEFINITIONS
Materials and installation requirements where existing plant
material is located in or adjacent to a construction area.
CSA G30.5-[M1983(R1998)], Welded Steel Wire Fabric for
Concrete Reinforcement.
.1
Mycorrhiza : association between fungus and roots of plants. This
symbiosis, enhances plant establishment in newly landscaped and imported
soils.
.2
Drip-line of trees: means the ground surface directly beneath tips of
outermost branches, which shall not be less than 3.0 m radius from the
trunk or may be larger as designated by the Contract Administrator.
.3
Critical Root Zone of trees (CRZ): means the zone under a tree where there
should be no disturbance before, during and after construction. The CRZ is
established as being 10 centimetres from the trunk of a tree for every
centimetre of trunk diameter. The protected zone may be larger as
designated by the Contract Administrator.
.1
Waste Management and Disposal:
.1
Separate waste materials for reuse and recycling.
.2
Remove from site and dispose of packaging materials at
appropriate recycling facilities.
.3
Collect and separate for disposal paper, plastic, polystyrene,
corrugated cardboard packaging material in appropriate on-site
bins in accordance with Waste Management Plan.
.4
Separate for reuse and recycling and place in designated
containers Steel, Metal, Plastic waste in accordance with Waste
Management Plan.
.5
Divert unused metal and wiring materials from landfill to metal
recycling facility as approved by Contract Administrator.
.6
Divert unused wood materials from landfill by alternative disposal
approved by Contract Administrator.
.7
Divert unused stone and aggregate materials from landfill to local
facility approved by Contract Administrator.
Nortrax
190 David Manchester Road, Ottawa
16 May 2014
32 01 90.33
TREE AND SHRUB PRESERVATION
Page 2
.8
.9
.10
.11
.12
.13
.14
Divert unused plastic materials from landfill to local recycling
facility approved by Contract Administrator.
Place materials defined as hazardous or toxic in designated
containers.
Dispose of unused fertilizer material at official hazardous material
collections site approved by Contract Administrator.
Handle and dispose of hazardous materials in accordance with
Regional and Municipal regulations.
Do not dispose of unused fertilizer material into sewer system,
into streams, lakes, onto ground or in any other location where
they will pose health or environmental hazard.
Ensure emptied containers are sealed and stored safely.
Fold up metal banding, flatten and place in designated area for
recycling.
1.7 SCHEDULING
.1
Obtain approval from Contract Administrator of schedule indicating
beginning of Work.
1.8 MAINTENANCE
DURING WARRANTY
PERIOD
.1
From time of acceptance by Contract Administrator to end of warranty
period, perform following maintenance operations.
.1
Water to maintain soil moisture conditions for optimum growth
and health of plant material without causing erosion.
.2
Apply pesticides in accordance with National Standard for
Pesticide Education, Training and Certification in Canada, Federal,
Provincial and Municipal regulations as and when required to
control insects, fungus and disease. Obtain product approval from
Contract Administrator prior to application.
.3
Apply fertilizer in early spring at manufacturer's suggested rate.
.4
Remove dead, broken or hazardous branches from plant material.
.1
Fertilizer:
.1
To Canada Fertilizer Act and Fertilizers Regulations.
.2
Complete, commercial, slow release with 35 % of nitrogen
content in water-insoluble form.
.2
Anti-desiccant: commercial, wax-like emulsion.
.3
Snow fence: Standard plastic fencing or approved equivalent in good
condition, 1.2 m high.
.4
T-bars: 2.4 m long steel T-bars; T-bars shall be straight.
PART 2 - PRODUCTS
2.1 MATERIALS
Nortrax
190 David Manchester Road, Ottawa
16 May 2014
32 01 90.33
TREE AND SHRUB PRESERVATION
Page 3
PART 3 - EXECUTION
3.1 IDENTIFICATION
AND PROTECTION
.1
Identify plants and limits of root systems to be preserved as approved by
Contract Administrator.
.2
Protect plant and root systems from damage, compaction and
contamination resulting from construction as approved by Contract
Administrator.
.3
Soil compaction within the drip line of a tree shall be avoided at all times,
unless otherwise agreed to in advance by the Contract Administrator.
Placement of plywood, metal decks, sand, etc. will be considered prior to
authorizing heavy equipment within the unprotected drip-line of all trees
on this project.
.4
Equipment shall not be allowed to operate, park, be repaired or refueled;
not shall construction materials be stored or any earth materials be
stockpiled within the barricades or within 2 m of the outer edge of the
drip-line of a tree.
.5
Ensure no pruning is done inside drip line. If pruning inside drip line is
required consult an arborist or Canadian Certified Horticultural Technician
(CCHT) as approved by Contract Administrator.
.6
Barrier for tree protection:
.1
To protect trees and shrubs in lawn areas or planting beds that
are to remain the Contractor shall drive T-bars vertically 1.2m into
ground, spaced maximum 3.0 m apart. The snow fence shall be
wired at 3 places to each T-bar. The snow fence shall be
stretched between posts to prevent sag.
.2
The snow fence shall be erected to provide a continuous barricade
between designated trees and the work area prior to
construction.
.3
The snow fence shall be placed at the critical root zone of the
trees, unless inadequate to provide a 1.5 m buffer zone between
the fence and limit of construction. With the permission of the
Contract Administrator, the fence may be placed within the
drip-line of the tree to provide the required buffer zone of 1.5 m
but in no case less than 1 m from the outer circumference to the
trunk of the tree.
.4
When the trunk of trees are less than 4.5 m apart, the trees shall
be considered a woodlot and the barrier shall be placed so it
forms a continuous barricade around the woodlot as specified in
the Contract Documents.
.7
Trunk protection:
.1
Where indicated by Contract Administrator, trunk protection shall
be installed to a height of 2.4 metres or as prescribed by the
Contract Administrator, wood laths shall be used (2” x 4” or other
material as approved by Contract Administrator) and shall be
temporarily installed parallel to the tree and around the complete
Nortrax
190 David Manchester Road, Ottawa
16 May 2014
32 01 90.33
TREE AND SHRUB PRESERVATION
Page 4
circumference of the tree by latching and / or wire.
3.6 PRUNING
3.7 ANTI-DESICCANT
.8
Tree protection measures shall be maintained erect and in good repair at all
times during construction operations, and shall be removed upon
completion when agreed to by the Contract Administrator. Temporary
removal of barricades will be considered only after reviewing the
requirements with the Contract Administrator.
.1
Where required, prune in accordance with Section [32 93 45 - Tree
Pruning].
.2
Prune crown to compensate for root loss while maintaining general form
and character of plant.
.3
Branches 25 mm or greater in diameter that are broken due to construction
operations shall be cut back cleanly on the tree side of the break or to
within 10 mm of their base, if a substantial portion of the branch is
damaged.
.4
Roots 25 mm or larger in diameter that are exposed due to construction
operations shall be cut back cleanly to the soil surface.
.5
Bark that is damaged shall be neatly trimmed back to uninjured bark
without causing further injury to the tree.
.1
Apply anti-desiccant to foliage where applicable and as directed by Contract
Administrator.
END