03100-qrs.doc
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- Attached to
- CONSTRUCT HEAVY TIMBER LOG RECREATION SHELTER AT AMOLE CANYON Federal contract opportunity
- Solicitation number
- AG-83A7-10-S-0013
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SECTION 03100PRIVATE
CONCRETE FORMWORK
PART 1.
GENERAL
1.01
SECTION INCLUDES
A.
Formwork for cast-in place concrete, with shoring, bracing, and anchorage.
B.
Openings for other work.
C.
Form accessories.
D.
Form stripping.
1.02
PRODUCTS INSTALLED BUT NOT FURNISHED UNDER THIS SECTION
A.
Section 03300 - Cast-In-Place Concrete: Supply of concrete accessories for placement by this section.
1.03
RELATED SECTIONS
A.
Section 03200 - Concrete Reinforcement.
B.
Section 03300 - Cast-in-Place Concrete.
C.
Section 03350 – Concrete Finishing 1.04
REFERENCES
A.
ACI 301 – Structural Concrete for Buildings.
B.
ACI 318 - Building Code Requirements for Reinforced Concrete.
C.
ACI 347 - Recommended Practice for Concrete Formwork.
D.
PS 1 - Construction and Industrial Plywood.
1.05
DESIGN REQUIREMENTS
A.
Design, engineer and construct formwork, shoring, and bracing to conform to design and code requirements; resultant concrete to conform to required shape, line, and dimension.
1.06
QUALITY ASSURANCE
A.
Perform Work in accordance with ACI 347.
1.07
QUALIFICATIONS
Design formwork under direct supervision of a Professional Structural Engineer experienced in design of this work and licensed in the State of New Mexico.
1.08
REGULATORY REQUIREMENTS
Conform to applicable code for design, fabrication, erection, and removal of formwork.
1.09
DELIVERY, STORAGE, AND HANDLING
A Deliver void forms and installation instructions in manufacturer's packaging.
B.
Store off ground in ventilated and protected manner to prevent deterioration from moisture.
1.10
COORDINATION
A.
Coordinate this Section with other Sections of work which require attachment of components to formwork.
B.
If formwork is placed after reinforcement resulting in insufficient concrete cover over reinforcement before proceeding, request instructions from COR.
PART 2. PRODUCTS
2.01
WOOD FORM MATERIALS
A.
Softwood Plywood: PS 1, C Plugged Grade, Group 2.
B.
Lumber: Pine species; construction grade or better; with grade stamp clearly visible.
2.02
PREFABRICATED FORMS
A.
Preformed Steel Forms: Minimum 16 gage matched, tight fitting, stiffened to support weight of concrete without deflection detrimental to tolerances and appearance of finished surfaces.
2.03
FORMWORK ACCESSORIES
Form Ties: Snap-off type, galvanized metal, adjustable length, cone type, with waterproofing washer, free of defects that could leave holes larger than 1 inch in concrete surface.
Form Release Agent: Colorless mineral oil which will not stain concrete, or absorb moisture, or impair natural bonding or color characteristics of coating intended for use on concrete.
C.
Dovetail Anchor Slot: Galvanized steel, 22 gage thick, foam filled, release tape sealed slots, anchors for securing to concrete formwork.
D.
Nails, Spikes, Lag Bolts, Through Bolts, Anchorages: Sized as required, of sufficient strength and character to maintain formwork in place while placing
E.
Waterstops: Rubber, minimum 1,750 psi tensile strength, minimum 50 Deg. F to plus 175 Deg. F working temperature range, maximum possible lengths, ribbed profile, preformed corner sections, heat welded jointing.
PART 3. EXECUTION
3.01
EXAMINATION
Verify lines, levels, and centers before proceeding with formwork. Ensure that dimensions agree with drawings.
3.02
EARTH FORMS
Hand trim sides and bottom of earth forms. Remove loose soil prior to placing
3.03
ERECTION - FORMWORK
A. Erect formwork, shoring, and bracing to achieve design requirements, in accordance with requirements of ACI 301.
Provide bracing to ensure stability of formwork. Shore or strengthen formwork subject to over stressing by construction loads.
Arrange and assemble formwork to permit dismantling and stripping. Do not damage concrete during stripping. Permit removal of remaining principal shores.
D. Align joints and make watertight. Keep form joints to a minimum.
E.
Obtain approval before framing openings in structural members which are not indicated on Drawings.
F.
Install void forms in accordance with manufacturer's recommendations. Protect forms from moisture or crushing.
3.04
APPLICATION - FORM RELEASE AGENT
A.
Apply form release agent on formwork in accordance with manufacturer’s recommendations.
B.
Apply prior to placement of reinforcing steel, anchoring devices, and embedded items.
C.
Do not apply form release agent where concrete surfaces will receive special finishes forms with clean water. Keep surfaces coated prior to placement of concrete or applied coverings which are effected by agent. Soak inside surfaces of untreated forms with clear water. Keep surfaces coated prior to placement of concrete.
3.05
INSERTS, EMBEDDED PARTS, AND OPENINGS
Provide formed openings where required for items to be embedded in passing through concrete work.
Locate and set in place items which will be cast directly into concrete.
Coordinate with work of other sections in forming and placing openings, slots, reglets, recesses, sleeves, bolts, anchors, other inserts, and components of other work.
D.
Install accessories in accordance with manufacturer's instructions, straight, level, and plumb. Ensure items are not disturbed during concrete placement.
E.
Install waterstops continuous without displacing reinforcement. Heat seal joints watertight.
F.
Provide temporary ports or openings in formwork where required to facilitate cleaning and inspection. Locate openings at bottom of forms to allow flushing water to drain.
G.
Close temporary openings with tight fitting panels, flush with inside face of forms, and neatly fitted so joints will not be apparent in exposed concrete surfaces.
3.06
FORM CLEANING
A.
Clean forms as erection proceeds, to remove foreign matter within forms.
B.
Clean formed cavities of debris prior to placing concrete.
C.
Flush with water or use compressed air to remove remaining foreign matter. Ensure that water and debris drain to exterior through clean-out-ports.
D.
During cold weather, remove ice and snow from within forms. Do not use de-icing salts. Do not use water to clean out forms, unless formwork and concrete construction proceed within heated enclosure. Use compressed air or other means to remove foreign matter.
3.07
FORMWORK TOLERANCES
A.
Construct formwork to maintain tolerances required by ACI 301.
3.08
FIELD QUALITY CONTROL
A. Inspect erected formwork, shoring, and bracing to ensure that work is in accordance with formwork design, and that supports, fastenings, wedges, ties, and items are secure.
Do not reuse wood formwork more than 3 times for concrete surfaces to be exposed to view. Do not patch formwork.
3.09
FORM REMOVAL
A. Do not remove forms or bracing until concrete has gained sufficient strength to carry its own weight and imposed loads.
B.
Loosen forms carefully. Do not wedge pry bars, hammers, or tools against finish concrete surfaces scheduled for exposure to view.
C.
Store removed forms in manner that surfaces to be in contact with fresh concrete will not be damaged. Discard damaged forms.
PART 4 - MEASUREMENT AND PAYMENT
4.01
MEASUREMENT
A.
The work specified herein will not be measured for payment.
4.02
PAYMENT
This work is incidental to other items in this contract and direct separate item payments will not be made.
END OF SECTION
03100-1
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