237 322
237
MASONS SUPPLY COMPANY
Oregon (800) 537-3407 ♦ Washington (800) 537-6216
Clackamas | Eugene | West Eugene | Hillsboro | Medford | Portland | Salem | Wilsonville | Ridgefield | Seattle | Tacoma | Woodinville
M A S C O . N E T
3.3 CAST IN PLACE INSTALLATION PROCEDURES
A.
Temperature affects the setting time and rate of strength of
concrete, standard ACI procedures for storing, mixing, and placing
concrete in hot or cold weather are recommended. See ACI 305
“Standards on Hot Weather Concreting," or ACI 306 “Standard on
Cold Weather Concreting.”
B.
Provide expansion and control joint width indicated in drawings.
All joint materials used follow manufacturer’s directions and
instructions.
1.
Expansion joints must be carried through all layers of installation
materials including warning panels, concrete substrate and steel
reinforcing. Joints should be spaced typically 8’ to 12’ in both
directions. All perimeter edges of ramps or blended transitions
should have expansion joints. (Refer to ACI 360R guidelines for
details on placement, size and specifications of material)
C.
Position forms for proper grade, slopes anduniformslab thickness.
Consult contract documents for details on reinforcement and joint
placement to prevent random cracking.
D.
The concrete specified shall conform to contract documents
with a maximum slump of 4”. Concrete shall be poured and
finished to the proper grade and slope prior to warning panel
placement. Concrete thickness shall be increased 1” in depth
beneath area receiving warning panels.
E.
Consult contract documents for more information on locations
to receive detectable warning panels.
1.
Monolithic poured curb and sidewalk - place panels 6” to 8”
from curb line.
2.
Existing curbs - place panels 8” from curb line to allow 2” of new
concrete in front of panels.
3.
Install across the full width of ramp or blended transition a
minimum 24” in depth.
F.
Recess panels below finish grade with
INSTALaTACT®
installation
template tool before initial concrete set and level base with wood
float to leave an open surface.
G.
Pre-dampen back of
CASTinTACT®
panels with potable water.
Apply 1/8” thickness of
CASTinTACT® Wet Set PreMix
(3:1 ratio of
powder to potable water) or (1:1:
½
ratio of Portland cement, clean
masons sand and potable water). Work into textured surface
on back of panel with rubber float for 100% surface coverage.
Alternatively a scrub coat of fresh concrete removed from the
INSTALaTACT®
tool can be used as a parge coat.
H.
Install Tactile Panels immediately in fresh concrete and lightly
tap panels to grade using a rubber mallet to insure bond and 100%
surface contact.
Wedge or flared edge of panel facing the
curb and square edges of panel joints butted together
. Base of
truncated dome should be flush with adjacent surfaces to permit
proper drainage and eliminate tripping hazard between surfaces.
Tolerance between tactile panels and surrounding surfaces is
1/16” maximum. Immediately after placement re-check slope
and elevation for proper grade.
ALTERNATE (EXTREME CLIMATES) Leave a 3/16” gap between
square cut panels joints and seal with a compatible elastomeric
sealant conforming to ASTM C920. Follow sealant manufacturer’s
recommendations for jointpreparationand installationprocedures.
Protect from traffic until sealant cured.
I.
Finish surrounding concrete flush with tactile panels. Edge
around panels with 1/8” radius edger, install control joints and
finish in accordance with project specifications.
J.
Finish joints per specifications. Follow all manufacturer’s
recommendations for joint preparation and installation
procedures.
K.
Clean fresh dried concrete residue off panels with a stainless
steel wire brush and rinse with clean water and hydra sponge to
ensure a clean appearance.
L.
Fresh concrete surrounding tactile panels should be cured in
accordance with ACI 308. Use a curing compound meeting ASTM
C 309. PROTECT PANELS WITH
PROTECTaTACT
OR SIMILAR WHILE
SPRAYING CURING COMPOUND.
3.4 CLEANING
A.
Remove all unused material, tools, and equipment. Dispose
of properly.
B.
If the detectable / tactile surface requires, clean the panels in
accordance with
CASTinTACT® Cleaning and Maintenance Guide
.
3.5 PROTECTION
Protect the
CASTinTACT®
Warning Panel surface from traffic until
desired strength is achieved. If necessary, protect panels with
plywood and a underlayment layer of non-staining, non-woven
curing blanket until acceptance of work. Secure plywood if needed.
3.6 STORAGE
Store products under cover in manufacturer’s unopened
packaging until ready for installation. Store pallets on supported
flat surface. DO NOT DOUBLE STACK PALLETS.
Early Entry - Fresh Set
Concrete Tactile Warning Panels
CASTinTACT
®
Download the full specifications online at
www.CASTinTACT.com