Features and Benefits
Fielders RF55® is a traditional flat pan or ‘re-entrant’ profile that provides unmatched performance in suspended concrete slabs. RF55® is used in both concrete and steel frame construction and utilises patented technology to achieve superior spanning capabilities, less deflection and greater composite strength than similar re-entrant profiles. RF55® comes complete with a range of accessories allowing for easy suspension of ceilings and services.
| Feature | Benefit |
| Unique profile | Concrete savings of up to 60% when compared to alternative formwork products |
| Less concrete by volume | Lower overall dead load of flooring, and reduced frame and foundation loads |
| Large unpropped spans | Less propping congestion and easy access to the underside of the slab |
| ReLokTM Features | A strong mechanical interlock with the concrete slab resulting in stronger composite strength. |
| SlimFlor® construction | Floor system depths as low as 280mm |
RF55® Material Specifications
RF55® is manufactured from G550 (550 MPa Yield Stress) steel with a Base Metal Thickness (BMT) of 0.60mm, 0.75mm, and 1.00mm. The thicknesses of 0.90mm and 1.20mm BMT are also available on request. The galvanised coating thickness is a Z350 (350 g/m2) in accordance with AS 1397:2001. RF55® is available in two sheet widths. The traditional 600mm wide cover, 3-PAN, and the easy to handle, 400mm wide cover, 2-PAN. The RF55®-2P is equivalent in all aspects technically to the RF55®-3P. Similarly, the recommendations for RF55® in construction also apply to both RF55®-3P and RF55®-2P. Please check with your local branch as to which version applies in your state.
RF55® Formwork/Slab Span Tables Single Span
RF55® Formwork/Slab Span Tables Continuous Span
| Slab Depth (mm) | 0.6 BMT Number of props per span | 0.75 BMT Number of props per span | 0.9 BMT Number of props per span | 1.0 BMT Number of props per span |
||||||||||||
| 0 | 1 | 2 | 3 | 0 | 1 | 2 | 3 | 0 | 1 | 2 | 3 | 0 | 1 | 2 | 3 | |
| 90 | 2400 | (5400) | (8150) | (10850) | 3350 | (6800) | (10200) | (13600) | (3700) | (7500) | (11300) | (15050) | (3800) | (7800) | (11700) | (15600) |
| 100 | 2350 | (5250) | (7900) | (10550) | 3250 | (6600) | (9900) | (13200) | 3600 | (7300) | (11000) | (14650) | 3700 | (7600) | (11400) | (15200) |
| 110 | 2250 | (5150) | (7700) | (10300) | 3200 | (6400) | (9650) | (12850) | 3500 | (7150) | (10700) | (14300) | 3650 | (7400) | (11100) | (14800) |
| 120 | 2200 | (5000) | (7500) | (10000) | 3100 | (6250) | (9350) | (12500) | 3400 | (6950) | (104500 | (13950) | 3550 | (7200) | (10850) | (14450) |
| 130 | 2150 | (4900) | (7350) | (9800) | 3000 | (6100) | (9150) | (12200) | 3350 | (6800) | (10200) | (13600) | 3450 | (7050) | (10600) | (14150) |
| 140 | 2100 | 4750 | (7150) | (9550) | 2950 | (5950) | (8900) | (11900) | 3250 | (6650) | (10000) | (13350) | 3400 | (6900) | (10400) | (13850) |
| 150 | 2050 | 4650 | (7000) | (9350) | 2900 | 5800 | (8700) | (11650) | 3200 | (6500) | (9800) | (13050) | 3300 | (6800) | (10150) | (13550) |
| 160 | 2050 | 4550 | (6850) | (9150) | 2850 | 5700 | (8550) | (11400) | 3150 | 6400 | (9650) | (12850) | 3250 | (6650) | (10000) | (13300) |
| 170 | 2000 | 4500 | (6750) | (9000) | 2750 | 5600 | (8400) | (11200) | 3100 | 6300 | (9450) | (12600) | 3200 | 6550 | (9800) | (13100) |
| 180 | 1950 | 4400 | (6600) | (8800) | 2700 | 5500 | (8250) | (11000) | 3050 | 6200 | (9300) | (12400) | 3150 | 6450 | (9650) | (12900) |
| 190 | 1900 | 4300 | (6600) | (8800) | 2650 | 5350 | (8050) | (10750) | 3000 | 6100 | (9150) | (12200) | 3100 | 6350 | (9500) | (12700) |
| 200 | 1900 | 4250 | 6350 | (8500) | 2600 | 5250 | 7900 | (10550) | 2950 | 6000 | (9000) | (12000) | 3050 | 6250 | (9350) | (12500) |
| 210 | 1850 | 4150 | 6250 | (8350) | 2550 | 5150 | 7750 | (10350) | 2900 | 5900 | (8850) | (11800) | 3000 | 6150 | (9200) | (12300) |
| 220 | 1800 | 4100 | 6150 | (8200) | 2500 | 5100 | 7650 | (10200) | 2850 | 5800 | 8750 | (11650) | 2950 | 6050 | (9050) | (12100) |
| 230 | 1800 | 4000 | 6050 | (8050) | 2500 | 5000 | 7500 | (10000) | 2800 | 5750 | 8600 | (11500) | 2900 | 5950 | 8950 | (11950) |
| 240 | 1750 | 3950 | 5950 | 7950 | 2450 | 4900 | 7400 | (9850) | 2750 | 5650 | 8500 | (11350) | 2900 | 5900 | 8850 | (11800) |
| 250 | 1750 | 3900 | 5850 | 7800 | 2400 | 4850 | 7250 | 9700 | 2750 | 5600 | 8400 | (11200) | 2850 | 5800 | 8700 | (11650) |
| 260 | 1700 | 3850 | 5800 | 7700 | 2350 | 4750 | 7150 | 9550 | 2700 | 5550 | 8300 | (11100) | 2800 | 5750 | 8600 | (11500) |
| 280 | 1650 | 3750 | 5600 | 7500 | 2300 | 4600 | 6950 | 9250 | 2650 | 5400 | 8100 | 10800 | 2750 | 5600 | 8450 | (11250) |
| 300 | 1650 | 3650 | 5500 | 7350 | 2250 | 4500 | 6750 | 9000 | 2550 | 5200 | 7850 | 10450 | 2650 | 5500 | 8250 | 11000 |
| 320 | 1600 | 3600 | 5400 | 7200 | 2150 | 4350 | 6550 | 8750 | 2500 | 5050 | 7600 | 10150 | 2600 | 5350 | 8000 | 10700 |
| 340 | 1550 | 3500 | 5250 | 7000 | 2100 | 4250 | 6400 | 8500 | 2450 | 4950 | 7400 | 9900 | 2550 | 5200 | 7800 | 10450 |
| 360 | 1500 | 3400 | 5150 | 6850 | 2050 | 4150 | 6200 | 8300 | 2400 | 4800 | 7250 | 9650 | 2500 | 5100 | 7650 | 10200 |
| 380 | 1550 | 3350 | 5000 | 6700 | 2000 | 4050 | 6050 | 8100 | 2350 | 4700 | 7050 | 9450 | 2400 | 4950 | 7450 | 9950 |
| 400 | 1450 | 3250 | 4900 | 6500 | 1950 | 3950 | 5950 | 7900 | 2300 | 4600 | 6900 | 9250 | 2350 | 4850 | 7300 | 9750 |
1. Concrete density: 24kN/m3.
2. RF55® strength and serviceability capacities are based on full scale test results.
3. An additional concrete weight due to ponding of (0.7x deflection limit) 24.0kN/m3
has been considered for Strength and serviceability limit states.
4. The spans in the above table include a minimum bearing width of 50mm on each end support.
5. Supports shall be effectively rigid and strong to support construction loads.
6. The information contained in this publication is intended for guidance only.
This information should only be use by a qualified structural engineer.
7. The practical limit for span to slab depth ratio is considered to be 35 for single spans, 40 for continuous spans. Values above these limits are listed in [ ] brackets.
8. The spans in the tables are based on the condition that RF55® sheets are fully restrained
in the direction perpendicular to the sheet span.
9. Tables are based on the following maximum construction loads: − Workmen and equipment: 1kN/m2
− Mounting of concrete: 2kN/m2 over an area of 1.6m x 1.6m and zero on the rest of the area
− Stacking of material on RF55® before placement of concrete: 1kN/m2
− The table does not consider axial loads on the product
− Allowance for weight of reinforcement as well as the effect of ponding is included
RF55® Formwork/Slab Span Tables Continuous Span
Single Slab Span (L) on Steel support Formwork deflection limits L/130
| Slab Depth (mm) | 0.6 BMT Number of props per span | 0.75 BMT Number of props per span | 0.9 BMT Number of props per span | 1.0 BMT Number of props per span |
||||||||||||
| 0 | 1 | 2 | 3 | 0 | 1 | 2 | 3 | 0 | 1 | 2 | 3 | 0 | 1 | 2 | 3 | |
| 90 | 2400 | (5400) | (8150) | (10850) | 2700 | (6700) | (10200) | (13600) | 2850 | (7900) | (11100) | (15100) | 2950 | (8150) | (11550) | (15650) |
| 100 | 2350 | (5250) | (7900) | (10550) | 2600 | (6500) | (9900) | (13200) | 2800 | (7650) | (10800) | (14700) | 2850 | (8000) | (11200) | (15250) |
| 110 | 2250 | (5150) | (7700) | (10300) | 2550 | (6350) | (9600) | (12850) | 2700 | (7450) | (10550) | (14350) | 2800 | (7850) | (10900) | (14850) |
| 120 | 2200 | (5000) | (7500) | (10000) | 2500 | (6200) | (9350) | (12500) | 2650 | (7250) | (10300) | (14000) | 2750 | (7650) | (10700) | (14550) |
| 130 | 2150 | (4900) | (7350) | (9800) | 2450 | (6000) | (9150) | (12200) | 2550 | (7050) | (10050) | (13700) | 2650 | (7450) | (10450) | (14200) |
| 140 | 2100 | 4750 | (7150) | (9550) | 2400 | (5900) | (8900) | (11900) | 2500 | (6900) | (9850) | (13400) | 2600 | (7250) | (10200) | (13900) |
| 150 | 2050 | 4650 | (7000) | (9350) | 2350 | (5750) | (8700) | (11650) | 2450 | (6700) | (9650) | (13100) | 2550 | (7100) | (10000) | (13650) |
| 160 | 2050 | 4550 | (6850) | (9150) | 2300 | (5650) | (8500) | (11400) | 2400 | (6600) | (9450) | (12900) | 2500 | (6950) | (9800) | (13400) |
| 170 | 2000 | 4500 | (6750) | (9000) | 2250 | 5550 | (8400) | (11200) | 2400 | (6450) | (9300) | (12650) | 2450 | (6800) | (9650) | (13150) |
| 180 | 1950 | 4400 | (6600) | (8800) | 2200 | 5400 | (8200) | (11000) | 2350 | (6350) | (9150) | (12450) | 2400 | (6650) | (9500) | (12950) |
| 190 | 1900 | 4300 | 6500 | (8650) | 2150 | 5300 | (8050) | (10750) | 2300 | 6200 | (9000) | (12250) | 2400 | 6650 | (9350) | (12750) |
| 200 | 1900 | 4250 | 6350 | (8500) | 2100 | 5200 | (7900) | (10600) | 2250 | 6100 | (8850) | (12050) | 2350 | 6450 | (9200) | (12550) |
| 210 | 1850 | 4150 | 6250 | (8350) | 2100 | 5100 | (7750) | (10350) | 2200 | 5950 | (8700) | (11850) | 2300 | 6300 | (9050) | (12350) |
| 220 | 1800 | 4100 | 6150 | (8200) | 2050 | 5050 | 7600 | (10200) | 2200 | 5850 | (8600) | (11700) | 2250 | 6200 | (8950) | (12200) |
| 230 | 1800 | 4000 | 6050 | (8050) | 2050 | 4950 | 7500 | (10000) | 2150 | 5750 | (8500) | (11550) | 2250 | 6100 | (8800) | (12000) |
| 240 | 1750 | 3950 | 5950 | 7950 | 2000 | 4850 | 7400 | (9850) | 2150 | 5700 | 8350 | (11400) | 2200 | 6000 | (8700) | (11850) |
| 250 | 1750 | 3900 | 5850 | 7800 | 2000 | 4800 | 7250 | (9700) | 2100 | 5600 | 8250 | (11250) | 2150 | 5900 | 8600 | (11700) |
| 260 | 1700 | 3850 | 5800 | 7700 | 1950 | 4750 | 7150 | (9550) | 2050 | 5550 | 8150 | (11150) | 2150 | 5800 | 8500 | (11550) |
| 280 | 1650 | 3750 | 5600 | 7500 | 1900 | 4600 | 6950 | 9250 | 2050 | 5350 | 8000 | (10800) | 2100 | 5650 | 8300 | (11300) |
| 300 | 1650 | 3650 | 5500 | 7350 | 1800 | 4500 | 6750 | 9000 | 2000 | 5200 | 7750 | 10450 | 2050 | 5500 | 8050 | (11050) |
| 320 | 1600 | 3600 | 5400 | 7200 | 1750 | 4350 | 6550 | 8750 | 1950 | 5050 | 7550 | 10150 | 2000 | 5350 | 7850 | 10750 |
| 340 | 1550 | 3500 | 5250 | 7000 | 1700 | 4250 | 6400 | 8500 | 1900 | 4950 | 7350 | 9900 | 2000 | 5250 | 7650 | 10500 |
| 360 | 1550 | 3400 | 5150 | 6850 | 1700 | 4150 | 6200 | 8300 | 1850 | 4800 | 7200 | 9650 | 1950 | 5100 | 7500 | 10200 |
| 380 | 1500 | 3350 | 5000 | 6700 | 1650 | 4050 | 6050 | 8100 | 1800 | 4700 | 7050 | 9450 | 1850 | 5000 | 7300 | 10000 |
| 400 | 1450 | 3250 | 4900 | 6500 | 1600 | 3950 | 5950 | 7900 | 1750 | 4600 | 6900 | 9250 | 1850 | 4850 | 7150 | 9750 |
1. Concrete density: 24kN/m3.
2. RF55® strength and serviceability capacities are based on full scale test results.
3. An additional concrete weight due to ponding of (0.7x deflection limit) 24.0kN/m3
has been considered for Strength and serviceability limit states.
4. The spans in the above table include a minimum bearing width of 50mm on each end support.
5. Supports shall be effectively rigid and strong to support construction loads.
6. The information contained in this publication is intended for guidance only.
This information should only be use by a qualified structural engineer.
7. The practical limit for span to slab depth ratio is considered to be 35 for single spans, 40 for continuous spans. Values above these limits are listed in [ ] brackets.
8. The spans in the tables are based on the condition that RF55® sheets are fully restrained
in the direction perpendicular to the sheet span.
9. Tables are based on the following maximum construction loads: − Workmen and equipment: 1kN/m2
− Mounting of concrete: 2kN/m2 over an area of 1.6m x 1.6m and zero on the rest of the area
− Stacking of material on RF55® before placement of concrete: 1kN/m2
− The table does not consider axial loads on the product
− Allowance for weight of reinforcement as well as the effect of ponding is included
RF55® Formwork/Slab Span Tables Continuous Span
Single Slab Span (L) on Steel support Formwork deflection limits L/130
| Slab Depth (mm) | 0.6 BMT Number of props per span | 0.75 BMT Number of props per span | 0.9 BMT Number of props per span | 1.0 BMT Number of props per span |
||||||||||||
| 0 | 1 | 2 | 3 | 0 | 1 | 2 | 3 | 0 | 1 | 2 | 3 | 0 | 1 | 2 | 3 | |
| 90 | 2400 | (5400) | (8150) | (10850) | 2700 | (6700) | (10200) | (13600) | 2850 | (7900) | (11100) | (15100) | 2950 | (8150) | (11550) | (15650) |
| 100 | 2350 | (5250) | (7900) | (10550) | 2600 | (6500) | (9900) | (13200) | 2800 | (7650) | (10800) | (14700) | 2850 | (8000) | (11200) | (15250) |
| 110 | 2250 | (5150) | (7700) | (10300) | 2550 | (6350) | (9600) | (12850) | 2700 | (7450) | (10550) | (14350) | 2800 | (7850) | (10900) | (14850) |
| 120 | 2200 | (5000) | (7500) | (10000) | 2500 | (6200) | (9350) | (12500) | 2650 | (7250) | (10300) | (14000) | 2750 | (7650) | (10700) | (14550) |
| 130 | 2150 | (4900) | (7350) | (9800) | 2450 | (6000) | (9150) | (12200) | 2550 | (7050) | (10050) | (13700) | 2650 | (7450) | (10450) | (14200) |
| 140 | 2100 | 4750 | (7150) | (9550) | 2400 | (5900) | (8900) | (11900) | 2500 | (6900) | (9850) | (13400) | 2600 | (7250) | (10200) | (13900) |
| 150 | 2050 | 4650 | (7000) | (9350) | 2350 | (5750) | (8700) | (11650) | 2450 | (6700) | (9650) | (13100) | 2550 | (7100) | (10000) | (13650) |
| 160 | 2050 | 4550 | (6850) | (9150) | 2300 | (5650) | (8500) | (11400) | 2400 | (6600) | (9450) | (12900) | 2500 | (6950) | (9800) | (13400) |
| 170 | 2000 | 4500 | (6750) | (9000) | 2250 | 5550 | (8400) | (11200) | 2400 | (6450) | (9300) | (12650) | 2450 | (6800) | (9650) | (13150) |
| 180 | 1950 | 4400 | (6600) | (8800) | 2200 | 5400 | (8200) | (11000) | 2350 | (6350) | (9150) | (12450) | 2400 | (6650) | (9500) | (12950) |
| 190 | 1900 | 4300 | 6500 | (8650) | 2150 | 5300 | (8050) | (10750) | 2300 | 6200 | (9000) | (12250) | 2400 | 6650 | (9350) | (12750) |
| 200 | 1900 | 4250 | 6350 | (8500) | 2100 | 5200 | (7900) | (10600) | 2250 | 6100 | (8850) | (12050) | 2350 | 6450 | (9200) | (12550) |
| 210 | 1850 | 4150 | 6250 | (8350) | 2100 | 5100 | (7750) | (10350) | 2200 | 5950 | (8700) | (11850) | 2300 | 6300 | (9050) | (12350) |
| 220 | 1800 | 4100 | 6150 | (8200) | 2050 | 5050 | 7600 | (10200) | 2200 | 5850 | (8600) | (11700) | 2250 | 6200 | (8950) | (12200) |
| 230 | 1800 | 4000 | 6050 | (8050) | 2050 | 4950 | 7500 | (10000) | 2150 | 5750 | (8500) | (11550) | 2250 | 6100 | (8800) | (12000) |
| 240 | 1750 | 3950 | 5950 | 7950 | 2000 | 4850 | 7400 | (9850) | 2150 | 5700 | 8350 | (11400) | 2200 | 6000 | (8700) | (11850) |
| 250 | 1750 | 3900 | 5850 | 7800 | 2000 | 4800 | 7250 | (9700) | 2100 | 5600 | 8250 | (11250) | 2150 | 5900 | 8600 | (11700) |
| 260 | 1700 | 3850 | 5800 | 7700 | 1950 | 4750 | 7150 | (9550) | 2050 | 5550 | 8150 | (11150) | 2150 | 5800 | 8500 | (11550) |
| 280 | 1650 | 3750 | 5600 | 7500 | 1900 | 4600 | 6950 | 9250 | 2050 | 5350 | 8000 | (10800) | 2100 | 5650 | 8300 | (11300) |
| 300 | 1650 | 3650 | 5500 | 7350 | 1800 | 4500 | 6750 | 9000 | 2000 | 5200 | 7750 | 10450 | 2050 | 5500 | 8050 | (11050) |
| 320 | 1600 | 3600 | 5400 | 7200 | 1750 | 4350 | 6550 | 8750 | 1950 | 5050 | 7550 | 10150 | 2000 | 5350 | 7850 | 10750 |
| 340 | 1550 | 3500 | 5250 | 7000 | 1700 | 4250 | 6400 | 8500 | 1900 | 4950 | 7350 | 9900 | 2000 | 5250 | 7650 | 10500 |
| 360 | 1550 | 3400 | 5150 | 6850 | 1700 | 4150 | 6200 | 8300 | 1850 | 4800 | 7200 | 9650 | 1950 | 5100 | 7500 | 10200 |
| 380 | 1500 | 3350 | 5000 | 6700 | 1650 | 4050 | 6050 | 8100 | 1800 | 4700 | 7050 | 9450 | 1850 | 5000 | 7300 | 10000 |
| 400 | 1450 | 3250 | 4900 | 6500 | 1600 | 3950 | 5950 | 7900 | 1750 | 4600 | 6900 | 9250 | 1850 | 4850 | 7150 | 9750 |
1. Concrete density: 24kN/m3.
2. RF55® strength and serviceability capacities are based on full scale test results.
3. An additional concrete weight due to ponding of (0.7x deflection limit) 24.0kN/m3
has been considered for Strength and serviceability limit states.
4. The spans in the above table include a minimum bearing width of 50mm on each end support.
5. Supports shall be effectively rigid and strong to support construction loads.
6. The information contained in this publication is intended for guidance only.
This information should only be use by a qualified structural engineer.
7. The practical limit for span to slab depth ratio is considered to be 35 for single spans, 40 for continuous spans. Values above these limits are listed in [ ] brackets.
8. The spans in the tables are based on the condition that RF55® sheets are fully restrained
in the direction perpendicular to the sheet span.
9. Tables are based on the following maximum construction loads: − Workmen and equipment: 1kN/m2
− Mounting of concrete: 2kN/m2 over an area of 1.6m x 1.6m and zero on the rest of the area
− Stacking of material on RF55® before placement of concrete: 1kN/m2
− The table does not consider axial loads on the product
− Allowance for weight of reinforcement as well as the effect of ponding is included
RF55® Formwork/Slab Span Tables Continuous Span
Continuous : 3 Spans (L) on steel support - Formwork deflection limits L/240
| Slab Depth (mm) | 0.6 BMT Number of props per span | 0.75 BMT Number of props per span | 0.9 BMT Number of props per span | 1.0 BMT Number of props per span |
||||||||||||
| 0 | 1 | 2 | 3 | 0 | 1 | 2 | 3 | 0 | 1 | 2 | 3 | 0 | 1 | 2 | 3 | |
| 90 | 2650 | (5450) | (8200) | (10900) | 2900 | (5950) | [8950] | [11900] | 3100 | [6350] | [9550] | [12750] | 3250 | [6600] | [9900] | [13200] |
| 100 | 2600 | (5250) | (7900) | (10550) | 2800 | (5750) | [8650] | [11550] | 3000 | [6150] | [9250] | [12350] | 3150 | [6400] | [9600] | [12800] |
| 110 | 2500 | (5100) | (7650) | (10250) | 2750 | (5600) | [8400] | [11200] | 2950 | [5950] | [8950] | [11950] | 3050 | [6200] | [9350] | [12450] |
| 120 | 2450 | (4950) | (7450) | (9950) | 2650 | (5450) | [8200] | [10900] | 2850 | [5800] | [8750] | [11650] | 2950 | [6050] | [9050] | [12100] |
| 130 | 2350 | 4850 | (7250) | (9700) | 2600 | (5300) | [8000] | [10650] | 2800 | [5650] | [8500] | [11350] | 2900 | [5900] | [8850] | [11800] |
| 140 | 2250 | 4650 | (7000) | (9350) | 2550 | 5200 | [7800] | [10400] | 2700 | 5550 | [8350] | [11100] | 2800 | [5750] | [8650] | [11550] |
| 150 | 2200 | 4500 | (6800) | (9050) | 2500 | 5050 | [7600] | [10150] | 2650 | 5450 | [8150] | [10900] | 2750 | 5650 | [8500] | [11300] |
| 160 | 2150 | 4400 | (6600) | (8800) | 2400 | 4950 | [7450] | [9950] | 2600 | 5300 | [8000] | [10650] | 2700 | 5500 | [8300] | [11050] |
| 170 | 2050 | 4250 | 6400 | (8550) | 2350 | 4850 | [7300] | [9750] | 2550 | 5200 | [7800] | [10400] | 2600 | 5400 | [8100] | [10800] |
| 180 | 2000 | 4150 | 6200 | (8300) | 2300 | 4750 | 7100 | [9500] | 2450 | 5050 | [7600] | [10150] | 2550 | 5250 | [7900] | [10550] |
| 190 | 1950 | 4050 | 6050 | (8100) | 2250 | 4650 | 6950 | [9250] | 2400 | 4950 | 7450 | [9900] | 2500 | 5150 | [7750] | [10300] |
| 200 | 1900 | 3950 | 5900 | 7900 | 2200 | 4500 | 6800 | [9050] | 2350 | 4850 | 7300 | [9700] | 2450 | 5050 | 7550 | [10100] |
| 210 | 1850 | 3850 | 5750 | 7700 | 2150 | 4450 | 6650 | [8850] | 2300 | 4750 | 7150 | [9500] | 2400 | 4950 | 7400 | [9900] |
| 220 | 1850 | 3750 | 5650 | 7550 | 2100 | 4350 | 6500 | 8700 | 2250 | 4650 | 7000 | [9350] | 2350 | 4850 | 7300 | [9750] |
| 230 | 1800 | 3700 | 5500 | 7400 | 2050 | 4250 | 6400 | 8500 | 2250 | 4600 | 6850 | 9150 | 2300 | 4750 | 7150 | [9550] |
| 240 | 1750 | 3600 | 5450 | 7250 | 2000 | 4150 | 6250 | 8350 | 2200 | 4500 | 6750 | 9000 | 2300 | 4700 | 7050 | 9400 |
| 250 | 1700 | 3550 | 5350 | 7100 | 2000 | 4100 | 6150 | 8200 | 2150 | 4400 | 6650 | 8850 | 2250 | 4600 | 6900 | 9250 |
| 260 | 1700 | 3500 | 5250 | 7100 | 1950 | 4000 | 6050 | 8050 | 2100 | 4350 | 6550 | 8700 | 2200 | 4550 | 6800 | 9100 |
| 280 | 1600 | 3350 | 5050 | 6750 | 1900 | 3900 | 5850 | 7800 | 2050 | 4200 | 6350 | 8450 | 2150 | 4400 | 6600 | 8850 |
| 300 | 1550 | 3250 | 4850 | 6500 | 1850 | 3750 | 5650 | 7550 | 2000 | 4100 | 6150 | 8200 | 2100 | 4300 | 6450 | 8600 |
| 320 | 1500 | 3150 | 4700 | 6300 | 1800 | 3650 | 5500 | 7350 | 1950 | 4000 | 6000 | 8000 | 2050 | 4150 | 6250 | 8350 |
| 340 | 1450 | 3050 | 4550 | 6100 | 1750 | 3600 | 5350 | 7200 | 1900 | 3900 | 5850 | 7800 | 2000 | 4050 | 6100 | 8150 |
| 360 | 1450 | 2950 | 4450 | 5950 | 1700 | 3500 | 5250 | 7000 | 1850 | 3800 | 5700 | 7600 | 1950 | 3950 | 5950 | 7950 |
| 380 | 1400 | 2900 | 4350 | 5800 | 1650 | 3400 | 5100 | 6800 | 1800 | 3700 | 5550 | 7450 | 1900 | 3900 | 5850 | 7800 |
| 400 | 1350 | 2850 | 4300 | 5750 | 1600 | 3300 | 5000 | 6650 | 1750 | 3650 | 5450 | 7300 | 1850 | 3800 | 5700 | 7650 |
Concrete density: 24kN/m3.
2. RF55® strength and serviceability capacities are based on full scale test results.
3. An additional concrete weight due to ponding of (0.7x deflection limit) 24.0kN/m3
has been considered for Strength and serviceability limit states.
4. The spans in the above table include a minimum bearing width of 50mm on each end support.
5. Supports shall be effectively rigid and strong to support construction loads.
6. The information contained in this publication is intended for guidance only.
This information should only be use by a qualified structural engineer.
7. The practical limit for span to slab depth ratio is considered to be 35 for single spans, 40 for continuous spans. Values above these limits are listed in [ ] brackets.
8. The spans in the tables are based on the condition that RF55® sheets are fully restrained
in the direction perpendicular to the sheet span.
9. Tables are based on the following maximum construction loads: − Workmen and equipment: 1kN/m2
− Mounting of concrete: 2kN/m2 over an area of 1.6m x 1.6m and zero on the rest of the area
− Stacking of material on RF55® before placement of concrete: 1kN/m2
− The table does not consider axial loads on the product
− Allowance for weight of reinforcement as well as the effect of ponding is included
Installing Fielders RF55®
Temporary Propping
If temporary propping is required (refer to the temporary propping tables), props should be placed at the correct centres prior to laying the RF55® sheets. Generally, timber or steel bearers with a minimum dimension of 75mm x 75mm are used on vertical props. The props should be installed so as to prevent settlement during loading by wet concrete and other construction loads. 300mm wide ply strips, may be positioned above the header bearers to assist in dispersing the load and minimise any local deformation of the decking due to the headers. Temporary props should only be removed after the slab has reached sufficient strength (at least 75% of the specified 28-day strength). The full design load may only be applied once the slab has achieved 28-day strength.
Fasteners and Locations
The decking must be positively fixed to the supporting structure in order to avoid movement and excessive deflection during the pouring of concrete. When fixing to a steel support structure, shot fired pins or self- drilling/tapping fasteners should be used. Provide one fastener in each pan at every support. In the case of other support systems, such as brickwork, block work and concrete, the RF55® sheets must be temporarily held in place against wind and other effects until the concrete is poured.
Edge-form
Galvanised steel edge-forms can be used for the retention of wet concrete to the correct level at the decked floor perimeters. Edge-form is usually shot-fired to the steel support structure or to the RF55® deck and the top of the trim is connected back to the decking with restraint straps at approximately 600mm centres using either pop-rivets or self-drilling screws.
Reinforcement
Place all reinforcement in strict accordance with the structural engineer’s drawings and specification.
Concrete placement
The specified grade of concrete and any chemical admixtures must be in strict accordance with AS 3600:2018 and the structural engineer’s drawings and specification. The deck must be clear of any excess dirt, grease or debris as this inhibits bonding between the deck and concrete. Ensure that concrete is applied evenly over the decking surface, as mounding of the wet concrete will cause excessive local loading.
Laying RF55®
1. Place the RF55® sheet over the supports ensuring a minimum end bearing of 50mm. If supporting on a brick or masonry wall, provide a separating strip such as malthoid.
2. Tap the female rib with a hammer at a 45° angle to lock it into place.
