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The StrandecTM
Wall Form system is a unique fast track, energy
efficient construction system that is strong, versatile
and cost effective while minimizing energy consumption
with a broad appeal for the environment.
StrandecTM Wall Form Systems comprise of StrandecTM
lightweight panels easily assembled on site using
connectors. Once the panels are erected and braced,
concrete is poured into the cavity between them.
After the concrete has hardened, the panels stay
in place and become the insulating element for the
walls. The unique StrandecTM Wall Form
system combines the insulating effectiveness of
StrandecTM panels with the structural
integrity of concrete.
The partitions can have the natural wood strand
finish or screed finish – both can be further
finished by plastering, or additional veneering
with other cladding materials on the outside and
decorative materials on the interiors.
Wall system choice will be as per performance requirements
of fire, thermal insulation, acoustic levels, and
other physical properties such as heights, thickness,
weight, stiffness and expected structural
loads, wind loads, axial loads, seismic zone, and
temperature zones.
The partitions can have the natural wood strand
finish or screed finish – both can be further
finished by plastering, or additional veneering
with other cladding materials on the outside and
decorative
materials on the interiors.
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| Design Parameters |
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| System |
| The choice of system will be based on the partition
performance requirements – i.e. height , thickness, nature of duty,
fire resistance thermal shield, acoustics and other loading factors. See
the table |
| Components |
• StrandecTM Panels
• SWF
wall formers – tampered edge (other edges available on request)
• SWF (N) – Strandec Natural
• SWF(B) – StrandecTM
Burl – single side screed finished (white)
• SWF(C ) –
StrandecTM Compo – thermal panel
• Thickness
30, 40 ad 50mm
• Width 600mm; Length 1200mm
• Panel
connectors - Starters and couplers
• Damp proof course at footer
as per design specifications
• Rebars as per design requirements
• Glassfibre tape where seamless finish is required
• Jointing
compound where seamless finish is required
• Glassfibre Mat as
a substrate for finishing plaster where required
• Finishing plaster
if required |
| System Choices |
StrandecTM Panel made from Inorganic
Bonded Composites completed mineralized using Portland cement makes it as
strong as wood which does not shatter or crack and is fire resistant. The
matrix structure gives it strength with lightweight and also with unique
acoustical and thermal insulating.
The definitive properties of StrandecTM combined with the established
strengths of concrete a wide range of high performance walls can be assembled
in a fast track construction with StrandecTM Wall Form systems
perform to varying fire ratings, acoustics, stiffness and heights as per
the table. |
Code |
Construction |
Thickness(mm) |
Thermal Resistance
M2.k/w |
Weight Kg/M2 |
Fire Resistance
mins |
Sound Insulation
STC(dB) |
Stanard Walls |
R-value |
| 150CI/W210 |
30mm SWF formers connected by
T30/150 |
210 |
1.0035 |
60 |
240 |
55 |
| 150CI/W230 |
40 SWF formers connected by
T40/150 ties and with reinforced concrete core |
230 |
1.2635 |
66 |
240 |
56 |
| 200CI/W260 |
30mm SWF formers connected
by T30/200 ties and with reinforced concrete core |
260 |
1.038 |
72 |
240 |
57 |
| 200CI/W280 |
40mm SWF formers connected
by T40/200 ties and with reinforced concrete core |
280 |
1.298 |
78 |
240 |
57 |
| High Thermal Walls |
| 150CI/TW250 |
50mm SWF( C) and SWF (N)
formers connected by T50/150 ties and with reinforced
concrete core |
250 |
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| 200CI/TW300 |
50mm SWF( C) and SWF (N)
formers connected by T50/200 ties and with reinforced concrete core
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300 |
1.928 |
66 |
240 |
59 |
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| Applications |
| StrandecTM High Performance Walls
can be an ideal choice for various end users such as offices, schools, hotels,
hospitals, industries, theatres etc. |
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| Construction Procedures |
| Footings |
Should be constructed as would be done for conventional
wall construction following normal practices ensuring that they are in one
level with a key way on the top as per the wall layout and steel reinforcing
dowels protruding out to facilitate tie up of vertical rebars.
Mark the footing with a chalk line to show the inside and outside edges
of the wall to be formed.
with the outside vertical wire rods in the connectors embedded in the panels.
This assembly is placed on the lines marked ensuring that the panels are
in line and plumb Placement of Subsequent Courses – Coupler connectors
are placed pressing down the lower end of the wire rods on the top end of
the panels of the first course at 300mm centers one on either end being
placed at 150mm from |
| Dump proof course |
Any acrylic membrane type sealant can be used
as a damp proof course. 100mm of the starter rebars
and starter connectors are also to be painted with the sealant to assure
a good seal. |
| Former Assembly |
| Placement of First Course – Place the
starter connectors at 300mm centers with at least one on either end 150mm
from the edge the edge. The second course of panels is then pressed down
on the vertical wire rods of the connectors. Ensure both horizontal line
and levels are maintained. |
| Rebar Placement |
Horizontal rebar members are placed in the slots
provided on either ends of the connector. The horizontal bars are to be
staggered for above grade construction and on the external end for below
grade construction. The bars can be clipped at every 6 feet to the connector.
Vertical rebar is to be tied to the dowels on the footing in required spacing
as per design. |
| Braces |
| To ensure proper alignment of the wall formers
they should be braced at the ends and at the center. The bracing should
be in place on the inside face of the wall prior to concrete pour and after
the wall former is assembled to a height of 1200mm. |
| Concrete Pour |
Concrete with water/cement ratio of less than
0.60 and maximum aggregate sizes of 16mm with a slump of 120mm is poured
with a line or boom pump. For additional courses the previous course should
be left
rough and unfinished to provide better bond for the subsequent courses.
Control Joints are to be provided for partition runs over 6 meters at every
6 metres. |
| Jointing |
| Glass fibre tapes are placed on the center between
two abutting panels at the center of the StrandecTMSDB tapered
edge panels after filling up one coat of joint compound to hold the tape
in position. The second coat is applied after the first coat is dried to
cover the tape as well as the complete tapered portion of the panels on
either side of the joint. The joint compound is spread to a level on both
sides by a trowel. |
| Plastering |
| The final coat a skim coat is then spread on
the joint and the entire surface. Fibreglass mesh is placed on the StrandecTM
prior to the surface plastering. |
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