SECTION 03100

CONCRETE FORMWORK

PART 1 GENERAL

SECTION INCLUDES

Formwork for cast-in place concrete, with shoring, bracing and anchorage.

Openings for other work.

Form accessories.

Form stripping.

PRODUCTS INSTALLED BUT NOT FURNISHED UNDER THIS SECTION

Section 03300 - Cast-In-Place Concrete: Supply of concrete accessories for placement by this Section.

Section [_____-__________]: Supply of masonry accessories for placement by this Section.

Section 05500 - Metal Fabrications: Supply of metal fabrications for placement by this Section.

Section [_____-__________]: Supply of flashing reglets for placement by this Section.

Section [_____-__________]: Supply of mechanical items for placement by this Section.

Section [_____-__________]: Supply of electrical items for placement by this Section.

RELATED SECTIONS

Section [______-____________]:	Shoring and underpinning.

Section 03200 - Concrete Reinforcement.

Section 03300 - Cast-in-Place Concrete.

Section [______-____________]: Specially surfaced concrete.

Section 03366 - Post Tensioned Structural Concrete.

REFERENCES

ACI 347 - Recommended Practice For Concrete Formwork.

ANSI/ASME A17.1 - Safety Code for Elevators, Dumbwaiters, Escalators, and Moving Walks.

PS-1 - Construction and Industrial Plywood.

DESIGN REQUIREMENTS

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.

SUBMITTALS

Submit under provisions of Section [01300] [________].

Shop Drawings: Indicate pertinent dimensions, materials, bracing, and arrangement of joints and ties.

Product Data: Provide data on void form materials [and installation requirements].

QUALITY ASSURANCE

Perform Work in accordance with ACI [347] [301] [318].

Maintain [one] [____] copy of [each] document on site.

QUALIFICATIONS

Design formwork under direct supervision of a Professional Structural Engineer experienced in design of this work and licensed [at the place where the Project is located] [in the State of [____________]].

REGULATORY REQUIREMENTS

Conform to [applicable] [___________] code for design, fabrication, erection and removal of formwork.

FIELD SAMPLES

Provide under provisions of Section [01400] [________]. Coordinate with requirements stated in Section 03300.

DELIVERY, STORAGE, AND HANDLING

Deliver, store, protect and handle products to site under provisions of Section [01600] [________].

Deliver void forms and installation instructions in manufacturer's packaging.

Store off ground in ventilated and protected manner to prevent deterioration from moisture.

COORDINATION

Coordinate work under provisions of Section [01039] [________].

Coordinate this Section with other Sections of work which require attachment of components to formwork.

If formwork is placed after reinforcement resulting in insufficient concrete cover over reinforcement, request instructions from Architect/Engineer before proceeding.

PART 2 PRODUCTS

WOOD FORM MATERIALS

Form Materials: At the discretion of the Contractor.

****** [OR] ******

Softwood Plywood: PS 1, [C] [C Plugged] [D] Grade, Group [2] [3] [4].

****** [OR] ******

Plywood:	[Douglas Fir] [Spruce] [________] species; [solid one side] [select sheathing, tight face] [select sheathing] [sheathing] [medium density overlaid one side] grade; sound undamaged sheets with clean, true edges.

Lumber: [________] species; [________] grade; with grade stamp clearly visible.

MANUFACTURERS - PREFABRICATED FORMS

[__________________________________] Product [_________].

[__________________________________] Product [_________].

[__________________________________] Product [_________].

Substitutions: Under provisions of Section [01600] [________].

PREFABRICATED FORMS

Preformed Steel Forms: Minimum [16] [____] gage ([1.5] [____] mm) matched, tight fitting, stiffened to support weight of concrete without deflection detrimental to tolerances and appearance of finished surfaces.

Glass Fiber Fabric Reinforced Plastic Forms:	Matched, tight fitting, stiffened to support weight of concrete without deflection detrimental to tolerances and appearance of finished concrete surfaces.

Pan Type: [Steel] [Glass fiber] [________] of size and profile required.

Tubular Column Type:	Round, [spirally wound laminated fiber] [wood] [glass fiber] material, surface treated with release agent, non-reusable, of sizes required; [________] manufactured by [________________].

Void Forms: Moisture resistant treated paper faces, biodegradable, structurally sufficient to support weight of wet concrete mix until initial set; [2] [4] [____] inches ([50] [100] [____] mm) thick; [________] manufactured by [________________].

FORMWORK ACCESSORIES

Form Ties: [Removable] [Snap-off] type, [galvanized] [________] metal, [fixed] [adjustable] length, [cone type,] [with waterproofing washer,] [[____] inch ([____] mm) back break dimension,] free of defects that could leave holes larger than [one] [1-1/4] [____] inch ([25] [32] [____] mm) in concrete surface; [________] manufactured by [________________].

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]; [________] manufactured by [________________].

Corners:	[Filleted] [Chamfered], [rigid plastic] [wood strip] [________] type; [____ x ____] inch ([____ x ____] mm) size; maximum possible lengths; [________] manufactured by [________________].

Dovetail Anchor Slot: Galvanized steel, [22] [____] gage ([0.8] [____] mm) thick, [foam filled] [non-filled], release tape sealed slots, anchors for securing to concrete formwork; [________] manufactured by [________________].

Flashing Reglets: [Galvanized steel] [Rigid PVC], [22] [____] gage ([0.8] [____] mm) thick, longest possible lengths, with alignment splines for joints, [foam filled] [non-filled], release tape sealed slots, anchors for securing to concrete formwork; [________] manufactured by [________________].

Nails, Spikes, Lag Bolts, Through Bolts, Anchorages:Sized as required, of sufficient strength and character to maintain formwork in place while placing concrete.

Waterstops: [Rubber] [Polyvinyl chloride], minimum [1,750] [____] psi ([12] [____] MPa) tensile strength, minimum 50 degrees F (46 degrees C) to plus 175 degrees F (79 degrees C) working temperature range, [____] inch ([____] mm) wide, maximum possible lengths, ribbed profile, preformed corner sections, heat welded jointing; [________] manufactured by [________________].

****** [OR] ******

Waterstops: Minimum [____] oz ([____] mm thick) copper, [____] temper; maximum possible lengths.

PART 3 EXECUTION

EXAMINATION

Verify lines, levels and centers before proceeding with formwork. Ensure that dimensions agree with Drawings.

EARTH FORMS

Earth forms are not permitted.

****** [OR] ******

Hand trim sides and bottom of earth forms. Remove loose soil prior to placing concrete.

ERECTION - FORMWORK

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 overstressing by construction loads.

Arrange and assemble formwork to permit dismantling and stripping. Do not damage concrete during stripping. Permit removal of remaining principal shores.

Align joints and make watertight. Keep form joints to a minimum.

Obtain approval before framing openings in structural members which are not indicated on Drawings.

Provide [fillet] [and] [chamfer] strips on external corners of [beams] [joists] [columns] [and] [________________].

Install void forms in accordance with manufacturer's recommendations. Protect forms from moisture or crushing.

APPLICATION - FORM RELEASE AGENT

Apply form release agent on formwork in accordance with manufacturer's recommendations.

Apply prior to placement of reinforcing steel, anchoring devices, and embedded items.

Do not apply form release agent where concrete surfaces will receive [special finishes] [or] [applied coverings] which are effected by agent. Soak inside surfaces of untreated forms with clean water. Keep surfaces coated prior to placement of concrete.

INSERTS, EMBEDDED PARTS, AND OPENINGS

Provide formed openings where required for items to be embedded in or passing through concrete work.

Locate and set in place items which will be cast directly into concrete.

Coordinate work of other Sections in forming and placing openings, slots, reglets, recesses, chases, sleeves, bolts, anchors, and other inserts.

[Position recessed reglets for brick veneer masonry anchors to spacing and intervals specified in Section 04300.]

Install accessories in accordance with manufacturer's instructions, straight, level, and plumb. Ensure items are not disturbed during concrete placement.

Install waterstops continuous without displacing reinforcement. [Heat seal joints watertight].

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.

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.

FORM CLEANING

Clean and remove foreign matter within forms as erection proceeds.

Clean formed cavities of debris prior to placing concrete.

Flush with water or use compressed air to remove remaining foreign matter. Ensure that water and debris drain to exterior through clean-out ports.

During cold weather, remove ice and snow from within forms. Do not use de-icing salts or water to clean out forms, unless formwork and concrete construction proceed within heat enclosure. Use compressed air or other means to remove foreign matter.

FORMWORK TOLERANCES

Construct formwork to maintain tolerances required by ACI 301.

[Construct and align formwork for elevator hoistway in accordance with ANSI/ASME A17.1].

Camber slabs and beams [[1/4] [____] inch per 10 feet ([2] [____] mm/m)] [in accordance with ACI 301].

FIELD QUALITY CONTROL

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 [____] times for [concrete surfaces to be exposed to view] [______________.] Do not patch formwork.

FORM REMOVAL

Do not remove forms or bracing until concrete has gained sufficient strength to carry its own weight and imposed loads.

Loosen forms carefully. Do not wedge pry bars, hammers, or tools against finish concrete surfaces scheduled for

exposure to view.

Store removed forms in manner that surfaces to be in contact with fresh concrete will not be damaged. Discard damaged forms.

SCHEDULES

Basement Walls Not Exposed To View: Site fabricated plywood coated with form oil.

Basement Walls Exposed To View: Site fabricated rough sawn lumber.

Supported Floor Slabs: Prefabricated glass fiber pan forms, treated for exposed to view finish.

END OF SECTION