The Stringer is stronger and deeper than the normal Beam. It is 190 mm (7.5 in.) deep and permits larger spans between intermediate supports. It provides structural strength comparable to a 152mm x 304mm (6 in. x 12 in.) spruce member but has only one third the weight.
Applications:
Use as a stringer (primary member) for slab formwork
May also be used as a beam or a joist (secondary member)
Stringer 190 mm (7.5 in.) Table of Load Ratings at Given Spans
Span | Deflection1 L/360 | Load1 L/360 | Deflection2 L/270 | Load2 L/270 |
1.2 m 4 ft | 1.8 mm .07 inches | 51.6 (kN/m) 3537 (lb/ft) | 1.8 mm .07 inches | 51.6 (kN/m) 3537 (lb/ft) |
1.53 m 5 ft | 3.3 mm .13 inches | 41.3 (kN/m) 2830 (lb/ft) | 3.3 mm .13 inches | 41.3 (kN/m) 2830 (lb/ft) |
1.83 m 6 ft | 5.1 mm .20 inches | 30.6 (kN/m) 2100 (lb/ft) | 6.8 mm .27 inches | 36.5 (kN/m) 2500 (lb/ft) |
2.13 m 7 ft | 5.9 mm .23 inches | 19.2 (kN/m) 1319 (lb/ft) | 7.9 mm .31 inches | 25.7 (kN/m) 1760 (lb/ft) |
2.44 m 8 ft | 6.8 mm .27 inches | 13.0 (kN/m) 891 (lb/ft) | 9.0 mm .36 inches | 17.3 (kN/m) 1188 (lb/ft) |
2.74 m 9 ft | 7.7 mm .30 inches | 9.1 (kN/m) 621 (lb/ft) | 10.1 mm .40 inches | 12.1 (kN/m) 828 (lb/ft) |
3.05 m 10 ft | 8.5 mm .33 inches | 6.4 (kN/m) 441 (lb/ft) | 11.3 mm .44 inches | 8.6 (kN/m) 588 (lb/ft) |
3.35 m 11 ft | 9.3 mm .37 inches | 5.6 (kN/m) 386 (lb/ft) | 12.4 mm .49 inches | 7.52 (kN/m) 515 (lb/ft) |
3.66 m 12 ft | 10.2 mm .40 inches | 4.4 (kN/m) 298 (lb/ft) | 13.5 mm .53 inches | 5.80 (kN/m) 397 (lb/ft) |
3.96 m 13 ft | 11.0 mm .43 inches | 3.4 (kN/m) 234 (lb/ft) | 14.7 mm .58 inches | 4.56 (kN/m) 312 (lb/ft) |
4.27 m 14 ft | 11.9 mm .47 inches | 2.7 (kN/m) 188 (lb/ft) | 15.8 mm .62 inches | 3.66 (kN/m) 251 (lb/ft) |
4.57 m 15 ft | 12.7 mm .50 inches | 2.2 (kN/m) 152 (lb/ft) | 16.9 mm .67 inches | 2.96 (kN/m) 203 (lb/ft) |
4.88 m 16 ft | 13.5 mm .53 inches | 1.8 (kN/m) 126 (lb/ft) | 18.1 mm .71 inches | 2.45 (kN/m) 168 (lb/ft) |
5.18 m 17 ft | 14.4 mm .57 inches | 1.5 (kN/m) 105 (lb/ft) | 19.2 mm .76 inches | 2.04 (kN/m) 140 (lb/ft) |
5.49 m 18 ft | 15.2 mm .60 inches | 1.3 (kN/m) 88 (lb/ft) | 20.3 mm .80 inches | 1.71 (kN/m) 117 (lb/ft) |
5.79 m 19 ft | 16.1 mm .63 inches | 1.1 (kN/m) 75 (lb/ft) | 21.4 mm .84 inches | 1.46 (kN/m) 100 (lb/ft) |
6.10 m 20 ft. | 16.9 mm .67 inches | 0.93 (kN/m) 64 (lb/ft) | 22.6 mm .89 inches | 1.24 (kN/m) 85 (lb/ft) |
1Deflections based on simple spans.
2Design Load: Dead Load and Live Load
Factor of Safety: 2.2 to 1. Stringer to be laterally supported.
Technical Data
Metric | Imperial | |
Weight* | 7.8 kg/m | 5.2 lb / ft |
1xx | 14.17 x 106 mm4 | 34.04 in4 |
Sx max. | 160 x 103 mm3 | 9.76 in3 |
Sx min. | 139 x 103 mm3 | 8.48 in3 |
Area | 2497 mm2 | 3.87 in2 |
Standard Lengths and Weights
Metric | Imperial |
3.66 m/28.5 kg | 12 ft / 62 lb |
4.27 m /33.3 kg | 14 ft / 73 lb |
4.88 m /38.1 kg | 16 ft / 84 lb |
6.10 / 47.2 kg | 20 ft / 104 lb |