Peacock - F Grade Plywood
PEACOCK Film faced plywood has a factory applied phenolic fabric film on both sides. The phenolic fabric film is fonded under controlled conditions of temperature and pressure and is a protection against the chemical action of the concrete as well as the wet conditions. It is un affected by changes in humidity or temperature. Sheets are fully edge sealed to prevent penetration of moisture. Phenolic Fabric film faced plywood as developed specially to meet concrete formwork operations. It gives a more even finish to the concrete and has many.

MINIMUM NEED OF
REFINISHING 

Phenolic fabric film faced plywood sheets leave the concrete surface exceptionally clean. Interior concrete walls are left ready to paint and free from wood grain imprinting and splinters. This is an important saving, in that walls and ceilings can often be painted without the need for expensive plastering. 

REPETABLE AND PREDICTABLE FINISH 

The phenolic fabric film face greatly reduces the difference in absorbencies between used and new plywood
sheets, consequently providing a repeatable and predictable finish of the concrete. 


INCREASED LIFE OF SURFACE AGAINST WEAR 

Whilst no formwork surface will stand repeated misuse, the tough phenolic fabric film resists abrasion from the
wet concrete during pouring and compaction. 

REDUCTION OF SITE WORK 

Phenolic fabric film faced plywood reduces the time involved in striking, cleaning and re-applying release agents,
so the plywood can be re-used more quickly. 

REVERSIBLE PANELS 

As phenolic fabric film faced plywood has a fabric film on both sides it may be possible to obtain extra re-uses by
carefully reversing the fabric film faced sheets on the formwork frame. 
 
HOW TO GET THE BEST FROM PEACOCK 'F' GRADE FABRIC FILM FACED PLYWOOD 

Sealing of Edges

 
Phenolic fabric film faced plywood will withstand rough usage and is relatively undamaged by the chemical and abrasive action of concrete.  However, care and proper treatment of form, work panels are necessary if maximum cost savings are to be made.  Attention given to correct edge sealing, careful dismantling, cleaning and storage will ensure the maximum life and re-use of the panels.
Phenolic fabric film faced plywood has its edges completely sealed at the factory and it is most important that all edges remain sealed. To obtain full value from a phenolic fabric film faced sheet any recut edges should be sealed as soon as possible.  The reason for this is that water entering the edge of recut sheets can cause the veneers to swell and thus thicken the plywood sheet at these edges.

Sealing of Holes

 

      

There are a variety of edge sealers that are effective in preventing water from entering a formwork panel.  Amongst these are paints based on neoprene, chlorinated rubber, polyurethane and epoxy resin, and also cold-setting phenolic resin. Three coats of sealer should be applied to any edges.  
Any holes made in fabric film faced formwork panels should be sealed to prevent water entering.  If water does enter it may cause swelling around the holes.  The materials recommended as edges sealers are also effective for sealing holes.

Sealing of screw or Nail holes, Fixing Care

 

 

If it is found necessary to nails or screw through the face of the plywood (this practice being avoided wherever possible) it is recommended that screw holes are countersunk and filled with waterproof stopper of polyester resin or epoxy resin. Fixing care when plywoods have to be removed repeatedly, from the formwork, care in fixing will increase re-use. 
Nails for fixing should be as small and as few as practicable, although all corners must be nailed. Panel pins are generally recommended for this use as they pull through with minimum damage to the plywood when removed from the formwork. If nailing form the reverse side, double headed nails are best for easy removal.

Pouring of Concrete

 
Uneven loading of formwork should be avoided.  Best results are achieved if the concrete is poured as uniformly as possible in one continuous operation. The rate of pouring should exceed 2m per hour vertically. Wherever possible elements of a structure should be poured and compacted in single operations.

Cleaning and Repair

 
To obtain full life, Cleaning should be carried out immediately after each use. Phenolic fabric film faced plywood may be wiped with a rage dipped in a release agent or cleaned with water and stiff brush. It may be necessary to use a hardwood scraper but care should be taken not to damage the plywood face. Do not use a wire brush or sharp metal scraper to dislodge hardened concrete.  
Damage of the fabric film face my be repaired by applying three coats of polyurethane varnish or paint having ensured that the plywood is cleaning and dry before application .  Allow sufficient time for the varnish to dry before using the panel. If face damage is extensive, it may be worthwhile reversing the fabric film faced sheet on the formwork.

Storage

 
Re-use and maximum economy of a formwork panel is directly related to its careful handling. When formwork is stored it is worthwhile ensuring that storage follows good practice. Always clean and repair the formwork panels before storage.  The formwork should then be stacked off the ground on level supports and under cover. 
Framed formwork panels should be stacked alternately face to face and back to back to avoid face damages by bolts etc. If panels are wet, do not allow them to dry too rapidly.

 


ECONOMICAL SIZES AND THICKNESS
Tolerance as per ISI Specification)
Sizes: 8'x4', 7'x4', 6'x4'
Use
Thickness Nominal mm
No. of  
Plies
Weight/Unit area Kg/m2 Approx.
For light construction and curving
 
6
8
 
5
5
 
4.5
6.3
For regular construction
 
12
15
18
 
7
7
9
 
8.1
9.9
11.6
For heavy construction
21
24
11
13
13.4
15.2
Approx.-based on the maximum number of veneers per thickness at 11% moisture content.
DESIGN INFORMATION
The table below gives the allowable concrete pressures for multiple spanning panels at 19-27% moisture content, to give a maximum inter stud deflection of 1/300 span, with the face grain of the plywood perpendicular to the studs. The table is based on the use of standard size metric sheets of 1200 and 1500 mm widths. The plywood sheets should be of the standard constructions for plywood.
 

ALLOWABLE CONCRETE PRESSURES (kN/m2)

Plywood thickness (mm)
Stud spacing in mm
300
400
500
600
6
3
1
-
-
8
11
4
2
1
12
21
9
4
2
15
36
15
8
4
18
57
24
12
7
21
74
36
18
11
24
84
50
26
15
 
BENDING PLYWOOD FOR CURVED CONCRETE SURFACES
Phenolic fabric film faced plywood is particularly suitable for curved concrete formwork.  The plywood can be bent to the approximate minimum raddi shown in the table when the moisture content is below 16%. In some instances the load required to produce these curves is high and adequate are necessary.
Thickness  mm Parallel to grain Across the grain 45 Degree to Grain
6 650 350 400
8 1000 800 500
12 1500 1250 550
15 2400 1800 800
18 3500 3000 1200
 
OTHER USES 
Weather proof plywood suitable for Exteriors of homes, Building Constructions, Storage bins, Kiosk, Shuttering
& Furniture making, Truck Bodies, Trailers etc.