2.1.6
Plates, Angles, Anchors and Embedments
Material shall be as specified in PCI MNL-117. Steel items, other than
stainless, shall be coated with a rust-inhibiting paint or shall be hot-dip
galvanized. Steel items, including items embedded in concrete, shall be
either stainless steel or hot dip galvanized steel.
2.1.7
Form Release Agent
Release agent shall be manufacturer's standard nonstaining type.
2.1.8
Admixtures
Admixtures shall conform to ASTM C 494/C 494M.
Plasticizing admixture, if
used, shall conform to ASTM C 1017/C 1017M.
2.2
PRECAST CONCRETE UNITS
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NOTE: If prestressing is required or permitted, PCI
MNL-116 will be referenced in addition to PCI
MNl-117.
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Precast concrete units shall be manufactured and cured in accordance with
the applicable provisions of PCI MNL-116 and PCI MNL-117. Units shall be
manufactured within the allowable tolerances given in [PCI MNL-116,] [PCI
MNL-117 and PCI MNL-122].
2.2.1
Formwork
Forms shall be steel of adequate thickness, braced, stiffened, anchored and
aligned to produce precast architectural concrete units within required
dimensional tolerances. Forms shall be sufficiently rigid to provide
dimensional stability during handling and concrete placement and
consolidation. Fiberglass-reinforced plastic, plastic coated wood,
elastomeric or other nonabsorptive material shall be used for making tight
joints and rustication pieces.
2.2.2
Reinforcement
Fabrication and placement of reinforcement shall conform to the details
shown on the approved detail drawings and [PCI MNL-116] [and] [PCI MNL-117].
2.2.3
Embedded Accessories
Anchors, inserts, lifting devices, and other accessories which are to be
embedded in the precast units shall be furnished and installed in
accordance with the approved detail drawings. Embedded items shall be
accurately positioned in their designed location, and shall have sufficient
anchorage and embedment to satisfy design requirements.
2.2.4
Stripping
Precast concrete units shall not be removed from forms until units develop
sufficient strength to safely strip the formwork and to remove the precast
concrete units from the forms to prevent damage to the units from
overstress or chipping.
SECTION 03413A
Page 9
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