LATTICE GIRDERS - AVI · LATTICE GIRDERS LATTICE GIRDERS FOR HALF SLABS SPECIAL GIRDERS LATTICE...

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LATTICE GIRDERS CONNECTING ELEMENTS BETWEEN PRECAST CONCRETE COMPONENTS AND IN-SITU CONCRETE WWW.AVI.AT

Transcript of LATTICE GIRDERS - AVI · LATTICE GIRDERS LATTICE GIRDERS FOR HALF SLABS SPECIAL GIRDERS LATTICE...

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 [email protected]

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