1กม2 construction steel strand
|
1กม3 construction steel strand |
1กม7 construction steel strand
|
Aunnotation:Dg- (Diameter of steel strand )mm;
dกฃ- (diameter of central steel wire ) mm;
d- (diameter of outer steel strand)mm;
a-(1กม3 construction measurement size of steel strand)mm
|
1กม2 construction sizes and
allowable of steel strand
|
| construcetion of steel strand |
nominal diameter(mm) |
diameter allowable tolerance (mm) |
nominal sectional area(mm2) |
theo retical weight of every 1000m steel strand(kg) |
| steel strand |
steel wire |
| 1กม2 |
10.00 |
5.00 |
+0.30
-0.15 |
39.5 |
310 |
| 12.00 |
6.00 |
56.9 |
447 |
|
|
1กม3 construction sizes and allowable
tolerance table of steel strand
|
| comstruction of steel strand |
nominal diameter |
measurement size of steel strand(MM) |
measurement size allowable tolerance of steel strand(mm) |
nominal sectional area of steel strand(mm2) |
theoretical weight of every 1000m steel strand(kg) |
| steel strand |
steel wire |
| 1กม3 |
10.80 |
5.00 |
9.33 |
+0.30
-0.15 |
59.3 |
465 |
| 12.90 |
6.00 |
11.20 |
85.4 |
671 |
|
|
1กม7 construction sizes and allowable
tolerance table of steel strand
|
| comstruction of steel strand |
nominal diameter(mm) |
diameter allowable tolerance(mm) |
nominal sectional area of steel strand(mm2) |
theoretical weight of every 1000m steel strand (kg) |
enlarged range of diameter of central steel wire not smaller than(%) |
| standard type |
9.50 |
+0.30
-0.15
|
54.8 |
432 |
2.0 |
| 11.10 |
74.2 |
580 |
| 12.70 |
+0.40
-0.20 |
98.7 |
774 |
| 15.20 |
139 |
1101 |
| mould drawn type |
12.70
|
112 |
890 |
| 15.20 |
165 |
1295 |
|
|
table of sizes and tensile
properties of steel strand
|
| construction of steel strand |
nominal diamenter of steel strand(mm) |
strength grade(mpa) |
maximum load of an entire strand |
yield load(kn) |
elongation rate(%) |
relaxaion rate at 1000h.not bigger than(%) |
| crade I reaxation |
grade II relaxation |
| preloading |
| not smaller than |
biggest load at 70% |
biggest load at 80% |
biggest load at 70% |
biggest load at 80% |
| 1กม2 |
10.00 |
1720 |
67.9 |
57.7 |
3.5 |
8.0 |
12 |
2.5 |
4.5 |
| 12.00 |
97.9 |
83.2 |
| 1กม3 |
10.80 |
102 |
86.7 |
| 12.90 |
147 |
125 |
| 1กม7 |
standard
type |
9.50 |
1860 |
102 |
86.6 |
| 11.10 |
1860 |
138 |
117 |
| 12.70 |
1860 |
184 |
156 |
| 15.20 |
1720 |
239 |
203 |
| 1860 |
259 |
220 |
| moulddrawtype |
12.70 |
1860 |
209 |
178 |
| 15.20 |
1860 |
300 |
255 |
|
|
Steel strand twisted by round steel wire used for prestressed concrete structure.rock or earth anchoraoe etc.
