FAQ
1)BS 1139 scaffolding tube
Technical parameters
|
MECHANICAL TESTS |
CHEMICAL COMPOSITION （％） |
||||||
|
Yield Strength |
Tensile Strength |
ELONGATION |
C |
Si |
P |
S |
N |
|
Mpa |
Mpa |
A |
|
|
|
|
|
|
≥235 |
≥340; ＜480 |
≥24% |
≤0.2 |
≤0.3 |
≤0.5 |
≤0.5 |
≤0.09 |
|
Tubes |
Type 4.0 |
Tolerance |
|
OD |
48.3 |
±0.5mm |
|
W.T. |
4.0 |
±10% |
|
Mass ,single tube |
4.37g/m |
＋12%,-8％ |
2)EN 74-1 standard
Couplers for tubes-Requirements and test procedures
|
|
size |
material |
type |
weight |
tolerance |
|
Double coupler |
48.3 |
Q235 |
forged |
0.97kg |
|
|
Swivel coupler |
48.3 |
Q235 |
forged |
1.13kg |
|
|
Sleeve coupler |
48.3 |
Q235 |
forged |
0.97kg |
|
|
|
Slipping force |
Failure force |
Pull-apartment |
|
Double coupler |
Δ |
Δ |
Δ |
|
Swivel coupler |
Δ |
Δ |
|
|
Sleeve coupler |
Δ |
|
Δ |
3)BS1139 couplers
British Standard,specification for steel and aluminium couplers,fittings and accessories for use in tubular scaffolding
|
|
size |
material |
type |
weight |
tolerance |
|
Putlog coupler |
48.3 |
Q235 |
forged |
0.62kg |
|
|
Girder coupler |
48.3 |
Q235 |
forged |
1.45kg |
|
|
Solid plate fanstener |
48.3 |
Q235 |
forged |
0.62kg |
|
|
|
Slipping force |
Failure force |
Pull-apartment |
|
Putlog coupler |
Δ |
|
|
|
Girder coupler |
Δ |
|
|
|
Solid plate fanstener |
Δ |
|
|
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