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LATTICE GIRDERSCONNECTING ELEMENTS BETWEEN PRECAST CONCRETE COMPONENTS AND IN-SITU CONCRETE
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AVI LATTICE GIRDERS
LATTICE GIRDERS
LATTICE GIRDERS FOR HALF SLABS
SPECIAL GIRDERS LATTICE GIRDERS WITH THE COMPLETE REINFORCEMENT REQUIRED FOR RESIDENTIAL
BUILDINGS
GIRDERS WITH GERMAN APPROVAL
ADVANTAGES OF THE PRODUCT• Secures the bonding between precast slabs
and in-situ concrete in the final state• Load-bearing capacity and serviceability of precast slab
when installed• Spacer strip for upper reinforcing element• Lower chords as flexural tensile reinforcement
• No diagonal projection on the upper chord side• Ample scope of design• Welded at all joints• Good transfer of shear forces• Perfect straightness
DESCRIPTIONLattice girders are three-dimensional, industrially prefabricated reinforcing elements. They consist of an upper chord and two lower chords and continuous truss wires. These are connected to the chords by means of electric resistance welding. All types of girder are available at short notice if ordered in the appropriate minimum quantities (approx. 10 t).
a ba
Diagonalbars
a
d3
HLowerchord
Upper chord
d2
d1
Rib slabs(Concrete and precast rib slab with clay bricks)
Large panel slabs(half slabs)
Double walls(precast cavity walls)
Weight and dimensional tolerances as per ÖNORM B 4707
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AVI LATTICE GIRDERS
VRds = (ASW/s)·z·fywd·(cot + cot )·sin ... Design value of resistance [kN] of diagonal reinforcement against shear force ... Angle of inclination of diagonal wires ... Angle of compression struts
z ... Lever arm of internal forces [m]
DIMENSIONS
Girder Height
H
Upper Chord
d3
Diagonal Wires
d2
Lower Chord
d1
Angle of
Inclina-tion
Factory Length
Weight per m
Shear Resistance
VRds/z
Internal Forces at Assembly
Permissible BucklingMomentof Upper
Chord
Permissible Shear
Force ofDiagonal
Wires
mm mm mm mm ° m kg/m kN/m kNm/Girder kN/Girder90 7.2 4.6 5.0 42.0 14.0 0.98 48.4·(1.110 + cot ) 0.49 4.30
110 7.2 4.6 5.0 47.7 14.0 1.02 53.5·(0.910 + cot ) 0.60 4.05
120 7.2 4.6 5.0 50.2 14.0 1.04 55.5·(0.833 + cot ) 0.66 3.81
130 7.2 4.6 5.0 52.4 14.0 1.06 57.3·(0.770 + cot ) 0.72 3.57
140 7.2 4.6 5.0 54.5 14.0 1.08 58.8·(0.714 + cot ) 0.78 3.33
150 7.2 4.6 5.0 56.3 14.0 1.10 60.1·(0.667 + cot ) 0.84 3.10
170 8.0 5.0 5.0 59.5 14.0 1.31 73.6·(0.589 + cot ) 1.44 3.75
180 8.0 5.0 5.0 60.9 14.0 1.34 74.6·(0.556 + cot ) 1.53 3.49
190 8.0 5.0 5.0 62.2 14.0 1.37 75.5·(0.527 + cot ) 1.62 3.24
200 8.0 5.0 5.0 63.4 12.0 1.39 76.4·(0.501 + cot ) 1.71 3.02
230 8.0 5.0 5.0 66.5 14.0 1.48 78.3·(0.435 + cot ) 1.97 2.46
240 8,0 5,0 5,0 67,4 14,0 1,50 78,8·(0,416 + cot ) 2,06 2,31
250 8,0 5,0 5,0 68,2 12,0 1,53 79,3·(0,400 + cot ) 2,15 2,16
LATTICE GIRDERS FOR HALF SLABS
DESCRIPTIONThis type of girder is a stocked product and therefore available at short notice.
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AVI LATTICE GIRDERS
DIMENSIONS, CROSS SECTIONS
Girder Heights
H
Upper Chordd3
Lower Chordd1
Diagonal Wires
d2
Spacing ofDiagonal
Barsa
BottomGirder Width
ba
Supply Lengths
mm mm mm mm mm mm
70–400 6–14 5–14 4–8 200 ca. 80 Factory lengths 12–14 m or
fixed lengths in increments
of 100 mm
SPECIAL GIRDERS
DESCRIPTIONSpecial girders are manufactured on individual customer demands.
STEEL CHARACTERISTICS FOR TRUSS GIRDERS ACCORDING TO ÖNORM B 4707
Girder Component Yield Strength Ratio of Tensile Strength/Yield Strength*
N/mm2 N/mm2
Lower Chord: reinforcing steel B550A ribbed
550 1.05
Upper Chord: B500A smooth or B550A ribbed
500 / 550 1.05
Diagonal Wires: B500A smooth or B550A ribbed
500 / 550 1.05
* for d = 5.0 to 5.5 mm, ratio of tensile strength/yield strength of 1.03 applies. No proof required for d < 5 mm
500 1.05
Upper Chord: B500A smooth or B500A ribbed
500 1.05
Diagonal Wires: B500A smooth or B500A ribbed
500 1.05
GIRDERS WITH GERMAN APPROVAL
DESCRIPTIONThe truss girders with German technical approval by DIBt include ALD truss girders for precast slabs with structural in-situ concrete layer and ALW truss girders for slab walls.
Girder Component Yield Strength Ratio of Tensile Strength/Yield Strength
N/mm2 N/mm2
Lower Chord: reinforcingsteel B500A ribbed
AVI LATTICE GIRDERS
INTERNAL FORCES AT ASSEMBLY
Girder Height Permissible Buckling Moment
of Upper Chord
Permissible Shear Force of Diagonal
Wires
(kNm/Girder) (kN/Girder)
150 1.27 4.33
190 1.62 3.24
SHEAR RESISTANCE OF GIRDER DIAGONALS
Girder Height Shear Resistance VRds/z
150 mm 71.0·(0.667 + cot )
190 mm 75.5·(0.527 + cot )
PRODUCT RANGE WITH HEIGHT OF 190 MM
Girder Length DiameterLower Chord
Cross-sectionLower Chord
GirderWeight
m mm cm2 kg/m
5.60 14 + 14 3.08 3.47
5.80 14 + 14 3.08 3.47
6.00 14 + 14 3.08 3.47
6.20 14 + 14 3.08 3.47
6.40 14 + 14 3.08 3.47
6.60 14 + 14 3.08 3.47
6.80 14 + 14 3.08 3.47
7.00 14 + 14 3.08 3.47
7.20 14 + 14 3.08 3.47
7.40 14 + 14 3.08 3.47
7.60 14 + 14 3.08 3.47
7.80 14 + 14 3.08 3.47
8.00 14 + 14 3.08 3.47
200
200 approx. 70
150(190) 56.3°
(62.2°)
Dimensions in mm
UG B550A
OG B500A
B500AØ 5
Ø 8
LATTICE GIRDERS WITH THE COMPLETE REINFORCEMENTREQUIRED FOR RESIDENTIAL BUILDINGS
DESCRIPTIONLattice girders with the complete reinforcement required for residential buildings are a special form of truss girder. The lower chord already contains the complete reinforcement for floor loads commonly found in residential buildings. Additional reinforcing elements are required for wider spans and heavier loads. Delivery in sets of 50 is in lengths of 1.20 m to 6.80 m, with a girder height of 150 mm, and 5.60 m to 8.00 m, with a girder height of 190 mm. Length increments are 20 cm.
PRODUCT RANGE WITH HEIGHT OF 150 MM
Girder Length DiameterLower Chord
Cross-sectionLower Chord
GirderWeight
m mm cm2 kg/m
1.20–2.20 5 + 5 0.39 1.26
2.40 5 + 6 0.48 1.33
2.60 6 + 6 0.57 1.39
2.80 6 + 7 0.67 1.47
3.00 7 + 7 0.77 1.55
3.20 7 + 8 0.89 1.65
3.40 8 + 8 1.01 1.74
3.60 8 + 9 1.14 1.84
3.80 9 + 9 1.27 1.95
4.00 9 + 10 1.42 2.07
4.20 10 + 10 1.57 2.18
4.40 10 + 11 1.74 2.31
4.60 11 + 11 1.90 2.44
4.80 11 + 12 2.08 2.58
5.00 12 + 12 2.26 2.73
5.20 12 + 14 2.67 3.05
5.40 12 + 14 2.67 3.05
5.60 14 + 14 3.08 3.37
5.80 14 + 14 3.08 3.37
6.00 14 + 14 3.08 3.37
6.20 14 + 14 3.08 3.37
6.40 14 + 14 3.08 3.37
6.60 14 + 14 3.08 3.37
6.80 14 + 14 3.08 3.37
ALPENLÄNDISCHE VEREDELUNGS-INDUSTRIE GESELLSCHAFT M.B.H.Gustinus-Ambrosi-Straße 1–38074 Raaba-Grambach/AustriaT +43 316 4005-0F +43 316 4005-507avi-verkauf@avi.atwww.avi.at
Latt
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Gird
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01/1
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For any information about availability and price of our products, please contact our sales department.
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