Parameters for circular duct : (mm)
| ID |
50 |
60 |
65 |
75 |
90 |
100 |
105 |
115 |
125 |
130 |
| OD |
55 |
65 |
70 |
80 |
95 |
105 |
110 |
120 |
130 |
135 |
| Deviation tolerance |
±0.50 |
| Thickness of standard steel strip |
>0.3 |
| Thickness of reinforced steel strip |
>0.32 |
>0.4 |
>0.6 |
■Note：Ducts with special specification not shown in the table can be supplied as per actual requirement.
■Subject to modification.
Parameters for slab duct : (mm)
| Short Axis |
Length |
24 |
24 |
24 |
24 |
24 |
24 |
24 |
24 |
| Deviation tolerance |
＋3/0 |
＋3/0 |
| Long Axis |
Length |
55 |
65 |
75 |
95 |
55 |
65 |
75 |
95 |
| Deviation tolerance |
±1/0 |
±2/0 |
| Thickness of steel strip |
0.3 |
■The short side can be straight or curve, when the short side is curve, the radius is the half of that along short axis.
■Ducts with special specification not shown in the table can be supplied as per actual requirement.
■Subject to modification.
Min Center Distance
| Type |
Min center distances(mm) |
support distances up to(m) |
Type |
Min center distances(mm) |
support distances up to(m) |
| T13-04 |
90 |
1 |
T15-04 |
108 |
1 |
| T13-07 |
108 |
1 |
T15-07 |
117 |
1 |
| T13-12 |
117 |
1 |
T15-12 |
162 |
1 |
| T13-15 |
162 |
1 |
T15-15 |
180 |
1 |
| T13-19 |
162 |
1 |
T15-19 |
180 |
1 |
| T13-22 |
180 |
1 |
T15-22 |
189 |
1 |
| T13-25 |
189 |
1 |
T15-25 |
207 |
1 |
| T13-27 |
189 |
1 |
T15-27 |
207 |
1 |
| T13-31 |
189 |
1 |
T15-31 |
207 |
1 |
Min support distance conform to the standard of public construcation commission.
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