zone perimeter overlaps; fall height and critical height value.
3.1.3
Obstructions Below Ground
When obstructions below ground affect the work, shop drawings showing
proposed adjustments shall be provided.
3.1.4
Percolation Test
A test for percolation shall be done to determine positive drainage, to
include the lowest elevation of the subgrade in the areas containing the
following: sand; gravel; wood by-products; or synthetic surfacing
installed over a pervious base. A positive percolation shall consist of a
minimum 25 mm 1 inch per 3 hour period. When a negative percolation test
occurs, a shop drawing shall be provided to indicate the corrective
measures.
3.1.5
Substitution
Under no circumstances are substitutions to be allowed or protective
surfacing to be selected without written approval from the technical
representative. Evaluate manufacturer substitutions for the critical
height value with meeting the site conditions and paragraph FALL HEIGHT.
3.1.6
Subgrade
Subgrade irregularities shall be corrected to ensure the required depth of
protective surfacing is provided. The subgrade elevation shall be as
required by the manufacturer.
3.1.7
Subsurface
The subsurface shall be installed in a true, even plane, and sloped to
provide positive drainage as indicated.
3.1.8
Subbase
Tolerance of the concrete or bituminous subbase shall be within a maximum 6
mm in 3 m 1/4 inch in 10 feet . Tolerance of aggregate subbase shall be
within a maximum similar to 6 mm in 3 m 1/4 inch in 10 feet.. Aggregate
subbase shall be compacted to a maximum 95 percent, ASTM D 1557. The
compaction shall be completed in accordance with Section 02300 EARTHWORK.
Sand, gravel, and wood products shall not be installed over a concrete,
aggregate, or bituminous subbase, per paragraph CHILD SAFETY.
3.1.9
Concrete or Bituminous Curing
Bituminous or concrete subbase shall be cured [a minimum of 7 days] [in
accordance with the manufacturer's requirements]. Curing compounds and
other deleterious substances that adversely affect adhesion shall be
removed. Surface shall be clean and dry.
3.1.10
Fall Height
**************************************************************************
NOTE: To determine the required depth of protective
surfacing, the fall height; maximum equipment height
dimensions; and spot elevations for each play event
shall be shown on the drawings.
SECTION 02791
Page 20
Previous Page
