071 622 99 33

PERFECT SLABS

www.perfectslabs.co.za

perfectslabs@gmail.com

Bernie de Klerk

WHAT ARE PRE-STRESSED HOLLOW CORE SLABS?Hollow core slabs are pre-stressed panels constructed with

hollow cores running from end-to-end and reinforced

with pre-stressed high-tensile steel wires.

This combination of hollowcores, high-strength concrete and

pre-stressing, results in a relatively light-weight durable and

strong panel.

APPLICATIONSFLOORS:

- flooring of multi-storey structures

- balconies

- suspended floors in areas of unstable ground

VERTICAL APPLICATION

- walls for buildings

- retaining walls

OTHER

- strongroom walls and roofs

- permanent shuttering

- sport stadium, walkways

SERVICES OFFERED BY PERFECT SLABS

- Assistance with planning of a layout

- The design of the floor panels only, should the client not enjoy the services of an

Engineer

- the transportation of units to site

- the installation of units, and final levelling thereof

- grouting of joints

ADVANTAGES OF USING PERFECT SLABS - No shuttering or supports are required (propping)

- No storage space is required

- No labour cost involved in the construction of the floors

- No time delay involved in the reaction and dismantling of shuttering and props

- No time delay while floors are cast and cure

- No risk of poor workmanship, the incorrect placing of reinforcements, of varying concrete

mixed or of poorly compacted concrete

- No ceilings are required

- Saving on the weight of the floor

Perfect Slabs is a supplier of Elematic SA en Shukuma Flooring Systems.

We satisfy the demand for high quality, reliable products that are available within short

lead times in an industy there the demand for building products is almost insatiable and

completion times are short. Our suppliers supply the latest available technology in

precast concrete products and set a new benchmark for the industry.

ELEMATIC SA was established in South Africa in 2005. Their production facility received

ISO 9001 certification in 2009 and their product is SABS approved.

SHUKUMA design their Concrete Hollowcore Units according to SANS 0100 and according

to the requirements of each structure for which they will be utilised.

PERFECT SLABS is therefore backed by extensive knowledge and experience.

COMPANY

120mm 150mm 200mm 250mm

Available standard width: 1 200mm 1 200mm 1 200mm 1 200mm

Non-standard widths:

Min. concrete strength at dimensioning: 35MPa 35MPa 35MPa 40MPa

Min. concrete strength a 28 days: 50MPa 50MPa 50MPa 50MPa

Suggested max. span / depth ration: L/50 L/50 L/50 L/50

Pre-stressing strand type:

Suggested bearings:

120mm 150mm 200mm 250mm

Slab only 240 275 329 386

Slab and joint 255 292 351 411

Slab, joint and 30mm levelling screed 330 367 426 486

Standard wiring patterns:

A 8 x 5mm wires

B 12 x 5mm wires

C 9 x 5mm wires + 3 x 9.53mm stand

D 7 x 5mm wires + 5 x 9.53mm strand

Load Capacity Table

Live Load kN/m² A Span (m) B Span (m) C Span (m) D Span (m)

0.75 4.50 5.50 6.00 6.30

1.50 4.20 5.10 5.50 5.80

2.50 3.80 4.60 5.00 5.30

4.00 3.40 4.10 4.50 4.70

5.00 3.20 3.90 4.20 4.40

7.50 2.80 3.40 3.70 3.90

10.00 2.50 3.00 3.40 3.50

SHUKUMA: STRUCTURAL DETAILS

in 100mm increments up to 1 200mm

5mm diameter triple indented low relaxation

wire

9.53mm diameter stabilised strand

Pre-stressings wire type:

Fire rating:

SHUKUMA: WEIGHTS AND FINISHES

WEIGHT (kg/m²)

SHUKUMA: 120mm DEEP SLABS

12.5mm diameter stabilised strand

on brickwork - 100mm

on steel - 75mm

on concrete - 75mm

1 hour standard. Higher ratings are possible

Standard wiring patterns:

A 8 x 5mm wires

B 12 x 5mm wires

C 9 x 5mm wires + 3 x 9.53mm stand

D 7 x 5mm wires + 5 x 9.53mm strand

E 4 x 5mm wires + 8 x 9.53mm strand

F 12 x 9.53mm stand (over 7m span = 2 x 5mm top wire)

Load Capacity Table

Live Load kN/m² A Span (m) B Span (m) C Span (m) D Span (m) E Span (m) F Span (m)

0.75 5.10 6.30 7.00 7.30 7.80 8.30

1.50 4.70 5.80 6.40 6.70 7.10 7.60

2.50 4.30 5.30 5.90 6.20 6.60 7.00

4.00 3.90 4.70 5.30 5.60 5.90 6.30

5.00 3.60 4.40 5.00 5.30 5.60 5.90

7.50 3.20 3.90 4.40 4.60 4.90 5.20

10.00 2.90 3.50 4.00 4.20 4.50 4.70

Standard wiring patterns:

A 8 x 5mm wires

B 12 x 5mm wires

C 9 x 5mm wires + 3 x 9.53mm stand

D 7 x 5mm wires + 5 x 9.53mm strand

E 4 x 5mm wires + 8 x 9.53mm strand (over 8m span - 2 x 5mm top wire)

F 12 x 9.53mm stand (over 6m span - 2 x 5mm top wire)

Load Capacity Table

Live Load kN/m² A Span (m) B Span (m) C Span (m) D Span (m) E Span (m) F Span (m)

0.75 5.80 7.20 8.20 8.70 9.20 9.80

1.50 5.40 6.60 7.70 8.00 8.50 9.10

2.50 5.00 6.10 7.00 7.40 7.90 8.40

4.00 4.50 5.50 6.30 6.80 7.20 7.60

5.00 4.20 5.20 6.00 6.40 6.80 7.20

7.50 3.70 4.60 5.30 5.70 6.00 6.40

10.00 3.40 4.10 4.80 5.20 5.50 5.80

SHUKUMA: 150mm DEEP SLABS

SHUKUMA: 200mm DEEP SLABS

Standard wiring patterns:

G 10 X 9.53mm strand (over8m span = 2 x 5mm top wire)

H+2 9 x 9.53mm strand + 3 x 12.55mm strand + 2 x 5mm wires - top

(over 9m span - 2 x additional x 5mm top wire)

J+4 4 x 9.53mm strand + 8 x 12.5mm strand + 4 x 5mm wires - top

Load Capacity Table

Live Load kN/m² G Span (m) H+2 Span (m) J+4 Span (m)

0.75 11.40 12.60 13.30

1.50 10.50 11.80 12.50

2.50 9.80 10.90 11.60

4.00 8.90 9.90 10.60

5.00 8.40 9.40 10.10

7.50 7.50 8.30 8.90

10.00 6.90 7.70 8.20

SHUKUMA: 250mm DEEP SLABS

150mm 200mm 250mm

Standard widths 1200mm 1200mm 1200mm

Density 2500Kg/m³ 2500Kg/m³ 2500Kg/m³

Areas of cross section 0.0997m² 0.1226m² 0.1499m²

Theoretical weight of slab 2.3KN/m² 2.7KN/m² 3.3KN/m²

Min concrete strength when dimensioning 30Mpa 30Mpa 30Mpa

50Mpa+ 50Mpa+ 50Mpa+

Prestressing strand types used

Accepted bearing tolerance

Suggested max Span / Depth

ELEMATIC: 150mm DEEP SLABS

Fire rating:

On steel = 75mm

On concrete = 75mm

Ratio: L/501 hour standard, higher ratings can

be achieved

Concrete Strength at 28 days

9.3mm and 12.5mm stabilized strand

On brickwork = 100mm

ELEMATIC: STRUCTURAL DETAILS

ELEMATIC: 200mm DEEP SLABS

ELEMATIC: 250mm DEEP SLABS

- A detailed floor layout drawing - A detailed layout drawing

- Design and engineer's certification - Design and engineer's certification

- A site visit to confirm access, readiness - Delivery to site of materials supplied

and conformity to drawings according to the dimensions given on the

- "As built" site measurements architectural drawing

- Manufactured panels to suit "as built" TOTAL COSTdimensions

- Delivery to site RIB & BLOCK EXCLUDES FOLLOWING - Installation by means of a mobile crane - Carrying and installing heavy

- Alignment and levelling of the panels materials

- Placing of minimal props where requires - Hiring and placing many props

- Grouting between the longitudinal - Placing the reinforcing and

joints of the panels mesh in accordance to the

TOTAL COST engineer's design

- "Wait" for the engineer to

check the accuracy and stability

- Grouting materials of installation

- Screeding or concrete topping - Calculating m³ of concrete &

- Mesh in screed (if specified) arranging delivery of readymix

- Finishing of soffit joint and painting or, mixing the concrete on site

with a texture paint (All according to the concrete

TOTAL COST strength specified)

- Hiring a concrete pump

- Pumping of placing the

concrete manually

- Hiring a power-floating

machine

- Power-floating the concrete

- Return of the power-floating

machine

- Leaving propped for 21 days

- Return of props

- Screeding the slab (if not

power-floated)

- Plastering the ceiling

- Painting the celling

TOTAL COST

PERFECT SLABS Price EXCLUDES

RIB & BLOCK PRICE INCLUDES

PERFECT SLABS vs. RIB & BLOCK

PERFECT SLABS PRICE INCLUDES

SOFFIT