02 - BTI - We know your business

1006
Selection of profile rails
A simple beam with a single
load of F kN in the midspan
as well as a single beam
with three identical loads
have been taken as the
basis for the stipulated data.
Each bearing is comprised
of a fixed bearing and a
movable bearing. The values
do not apply to suspensions
using threaded rods. In case
of the indicated maximum
span L mm, material class
2 is considered with a yield
strength Re or Rp0,2 280
MPa, a total load factor of v.
1.50, an E-module 190,000
MPa as well as a maximum
bending of f perm. = L/200.
In single cases, a visual
check should be made to
ensure that the indicated
bending is acceptable!
The double-profile rails are
bonded into single rails by
adhesive bond using pressure
resistance welding.
The permissible load of a
welding point is 10.7 kN at a
load factor of 150 %.
The welding point sequence
– starting at 20 mm – is
105 mm.
If several uneven single
loads are applied to a simple
beam (traverse) at different
distances, then these can be
added together and roughly
considered as the mean
single load.
If more than three
approximately identical
single loads are applied to
a simple beam in roughly
the same distances, then a
weight distribution for three
identical single loads 1/3 F
at 4 identical distances1/4 L
from the total load F can be
assumed.
�����
Overview of profile rails
35/20/0,8 35/35/1,0 45/26/1,5 45/40/2,0
Material DIN EN 10025/10147/10142
Hot-tip galvanized (fsv) -- -- -- -continuous
sheet galvanising/toothed (fbv)/(gz) S250GD-Z150-N-A S250GD-Z275-N-A S250GD-Z275-N-A/gz
Material thickness t mm 0.8 1 1.5 2.0
Delivery length L 2.0 2 6.0 6.0
Weight fbv/fsv G kg/m 0.65 0,9 1.2 2.0
Perforations Slit width mm 22 22 22 22
Dia. Oblong hole/extension x length mm 8.5 /_x 15 10.5 /_x 38.5 13 / 18 x 45 13 / 18 x 45
Dia. Pritchel hole mm 8.5 + 10.5 8.5 + 10.5 18 18
Raster dimension mm 25 25 105 105
Cross-sectional values y-axis:
centroidal distance ey1 cm 0.97 1.68 1.46 2.08
ey2 cm 1.03 1.82 1.14 1.92
cross section of profile A cm2 0.76 1.06 1.50 2.55
Moment of inertia ly cm4 0.40 1.87 1.37 5.24
Stress moment Wy1 cm3 0.41 1.10 1.08 2.73
Wy2 cm3 0.39 1.03 1.03 2.52
Radius of gyration iy cm 0.72 1.33 0.95 1.43
Cross-sectional values z-axis:
centroidal distance ez cm 1.75 1.75 2.25 2.25
Moment of inertia lz cm4 1.57 2.27 5.09 9.25
Stress moment Wz cm3 0.91 1.28 2.26 4.11
Radius of gyration iz cm 1.43 1.47 1.84 1.90
Deformation Span max. load max. load max. load max. load
fmax = fper. L F F F F
mm mm kN kN kN kN
1.3 250 9.853 26.283 25.805 65.229
2.5 500 2.328 6.571 6.451 16.307
3.8 750 0.685 2.920 2.357 7.248
5.0 1000 0.285 1.355 0.988 3.803
6.3 1250 0.143 0.690 0.500 1.937
7.5 1500 0.080 0.395 0.284 1.113
8.8 1750 0.048 0.246 0.175 0.693
10.0 2000 0.030 0.162 0.113 0.458
11.3 2250 0.019 0.111 0.076 0.316
12.5 2500 0.012 0.078 0.052 0.225
13.8 2750 0.008 0.057 0.036 0.164
15.0 3000 0.004 0.042 0.025 0.122
16.3 3250 0.002 0.031 0.017 0.091
17.5 3500 0.023 0.011 0.069
18.8 3750 0.017 0.007 0.052
20.0 4000 0.012 0.004 0.040
21.3 4250 0.009 0.001 0.030
22.5 4500 0.006 0.022
23.8 4750 0.004 0.016
25.0 5000 0.002 0.011
26.3 5250 0.006
27.5 5500 0.003
28.8 5750
30.0 6000
Deformation Span max. load max. load max. load max. load
fmax = fper. L F F F F
mm mm kN kN kN kN
1.3 250 1.230 3.290 3.230 8.150
2.5 500 0.620 1.640 1.610 4.080
3.8 750 0.320 1.100 1.080 2.720
5.0 1000 0.180 0.749 0.610 2.041
6.3 1250 0.550 0.400 1.530
7.5 1500 0.380 0.280 1.060
8.8 1750 0.280 0.780
10.0 2000 0.600
11.3 2250 0.470
12.5 2500 0.380
13.8 2750 0.320
15.0 3000 0.270
16.3 3250
17.5 3500
18.8 3750
20.0 4000
21.3 4250
22.5 4500
23.8 4750
25.0 5000
26.3 5250
27.5 5500
28.8 5750
30.0 6000
www.BTI-GROUP.COM
07
C
493