1
Steel floor with a RC slab
Part
1 – Steel beam
TUTORIALS AND PROJECT
COMPLEX STEEL
STRUCTURES
PROJECT DESCRIPTION
System of floor beams (2) and plate girders (1) creates grid supported
on external walls (4) and column (4).
Typical use: industrial buildings – heavy loads.
2
FLOOR BEAM
(1)
(2)
(4)
(3)
floor beam
girder
column
3
FLOOR BEAM
Cement floor
RC slab
STEEL FLOOR BEAM
Initial height of a beam:
o
L
h
⋅
÷
=
)
20
1
25
1
(
L
L
o
⋅
= 025
,
1
Design span of the beam
:
L
L
o
05
,
1
=
– beams supported on both sides on walls
– for beams supported on one side on a wall
(e.g. cantilever beams, beam supported by girder and wall)
but
beam
o
h
L
L
⋅
+
≥
5
,
0
L – distance between walls or between wall and support (bearing)
4
FLOOR BEAM
1.0.
Floor beam
1.1.
Static scheme – single span, simply supported beam
1.2.
Loads
1.2.1.
Dead Lods „g”
Load taken from a width of RC slab supported by floor beam „a” [kN/m]
Lp.
Load type
Characteristic Load
g
k
1
Cement floor
0,02m · a · 21kN/m
3
2
RC slab
0,08m · a · 24kN/m
3
3
Floor beam
Σ =
g+p
5
FLOOR BEAM
Characteristic value of a live load:
2
kN/m
7,5
p
=
acc. to EN 1991-1-1, surface load E1 (storage area)
1.2.2.
Live (imposed) load „p”
a
p
p
k
⋅
=
1.2.3. Design load for
ULS (STR):
∑
∑
≥
≥
+
+
1
j
k,1
Q,1
j
k,
j
G,
j
1
j
k,1
0,1
Q,1
j
k,
j
G,
p
γ
g
γ
ξ
p
Ψ
γ
g
γ
q
max
6
FLOOR BEAM
