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PFEIFER Thread System

• Well proven for thin precast concrete elements and wall panels

26

PFEIFER Round Thread

• Exceptionally robust thread even no chance for hammer blows• Not sensitive against dirt enables safe usage of dragged sockets• Metric round thread allows easy combination with any metric ISO thread

screw• High load capacities up to 20 tons

© 2004 Copyright PFEIFER, 87700 Memmingen / Technical changes and errors excepted. Status 11/2007 23

Thread System

Lifting Anchors

PFEIFER Bar Anchor Item-No. 05.019

Material:Sockets high grade precisionsteel tube, zinc-plated or stainless steel BST 500 S

Special length on request

The Pfeifer Bar Anchor is a completereinforced lifting anchor. It is speciallyrecommended for using at the upperend side of thin precast concretepanels as well as for large volumeconcrete panels. Anchorage in theconcrete is guaranteed by the bondbetween the ribbed reinforcement barand the concrete.

Ref. No. Ref. No. MWL adm. FZ adm FQ Dimensions mm Packing Unit Weight approx.zinc-plated stainless steel Load t kN kN Rd D ds e h Pieces kg/Packing Unit

05.019.123.195 05.019.124.195 0,5 5 2,5 Rd 12 x 1,75 15,2 8 22 195 200 15,0005.019.143.235 05.019.144.235 0,8 8 4,5 Rd 14 x 2,00 18,2 10 25 235 100 14,0005.019.163.280 05.019.164.280 1,2 12 6,5 Rd 16 x 2,00 21,2 12 27 280 100 24,80

05.019.183.305 05.019.184.305 1,6 16 8,5 Rd 18 x 2,50 24,2 14 34 305 50 19,5005.019.203.350 05.019.204.350 2,0 20 10,5 Rd 20 x 2,50 27,2 16 35 350 50 26,5005.019.243.400 05.019.244.400 2,5 25 12,5 Rd 24 x 3,00 31,2 16 43 400 25 18,30

05.019.303.510 05.019.304.510 4,0 40 20,5 Rd 30 x 3,50 40,2 20 56 510 1 1,4505.019.363.690 05.019.364.690 6,3 63 31,5 Rd 36 x 4,00 47,2 25 69 690 1 2,8005.019.423.840 05.019.424.840 8,0 80 40,5 Rd 42 x 4,50 54,2 28 80 840 1 3,90

05.019.523.915 05.019.524.915 12,5 125 62,5 Rd 52 x 5,00 67,2 32 97 915 1 7,65

(Note: 10kN = 10 Kilonewton = mass of 1ton or 1.000kg)

adm. FZ: admissible straight forceadm. FQ: admissible transversal shear force

(see instructions overleaf).MWL: Maximum working load

Sample order: 1000 Bar Anchors, zinc-plated, MWL 0,8 t1000 Bar Anchors, ref. no. 05.019.143.235

© 2004 Copyright PFEIFER, 87700 Memmingen / Technical changes and errors excepted. Status 11/200724

3. Parallel shear pull reinforcement

Table 3 – Parallel reinforcement with parallel pull at an angle of applicati-on β ≥ 12,5°

Größe zul FZ dS L dBr

kN mm mm mm

Rd 12 5 6 150 24Rd 14 8 6 200 24Rd 16 12 8 200 32

Rd 18 16 8 250 32Rd 20 20 8 300 32Rd 24 25 10 300 40

Rd 30 40 12 400 48Rd 36 63 14 550 56Rd 42 80 16 600 64

Rd 52 125 20 750 140

Should Bar Anchors be loaded by pa -rallel shear pull – as shown in Fig. 3 –the ensuing horizontal forces (Fig. 2)must be taken by the concrete. Thismeans that as from a parallel shearpull angle β of more than 12,5° a pa -rallel shear pull reinforcement (accor -ding to Table 3) which runs in theopposite direction of the forces, atright angles to the Bar Anchor, mustbe used (Fig. 4). This reinforcement isthen fixed to the Bolt Anchor with theData Clip. Close contact is important!

Installation Instructions forPFEIFER Bar Anchor

1. Reinforcement

PFEIFER Bar Anchors can be installed in concrete with a compressive strengthof 15 N/mm2 with a minimum necessary surface reinforcement according toTable 1, without special additional reinforcement. (Exception: parallel shearforce and transversal stress, see section 3, 4 and 5.) The swaged on rebarsthemselves transfer the forces into the concrete. Care is to be taken if thereis the possibility of cracks in the total tension zone. In this case a WavedAnchor would be more suitable. The user is responsible for the transmissionof forces within the precast concrete panel itself.

Table 1 – Surface reinforcement

Size Surface* Size Surface*reinforcement [mm2/m] reinforcement [mm2/m]

Rd 12 131 Rd 24 188Rd 14 131 Rd 30 188Rd 16 131 Rd 36 188Rd 18 188 Rd 42 188Rd 20 188 Rd 52 188

* The required amount of reinforcement has to be installed in both directions.

2. Edge distance, Minimum distance, Minimum panel thicknessIn order to guarantee the local force transmittance into the concrete, certaindistances of the individual anchors from each other and to the open paneledge have to be observed. Also, the panel thickness may not be less than acertain minimum owing to reasons of safety. The minimum value for the indi-vidual anchors are to be found in Table 2.The reduced panel thicknesses dred. stated in Table 2 are relevant for con - cre te with a concrete compressive strength βw = 15 N/mm2 and straight pull.Parallel shear pull up to β = 30° from the vertical is possible when using theparallel shear pull reinforcement according to point 3. Transversal pull is not possible!

Length (L) according to DIN 1045-1section 12.6.2 C12/15,good bond conditions.

Figure 2Straight

force

Data Clip

Horizontalforce

Paral

lel sh

ear p

ull

The following instructions pertain just to the abovearticle and are important, but the additional Gene-ral Installation Instructions for the PFEIFER ThreadSystem and the General Technical Introductionconcerning the PFEIFER Lifting Anchor Systemsmust also be observed.

The PFEIFER Bar Anchor belongs to the PFEIFERThread System which has been tested and is inaccordance with the “Safety Regulations for LiftingAnchors and Systems for Precast Concrete Parts”.

Figure 1

Figure 4BSt 500 Sor stainless steelreinforcement

Figure 3

Table 2 – Minimum dimensions

Size adm. FZ adm. FQ Edge Minimum Minimum Panel Reduced PanelDistance a Distance b Thickness d Thickness dred

kN kN mm mm mm mm

Rd 12 5 2,5 150 300 60 55Rd 14 8 4 200 400 70 60Rd 16 12 6 200 400 80 65

Rd 18 16 8 250 500 95 80Rd 20 20 10 275 550 110 90Rd 24 25 12,5 300 600 125 100

Rd 30 40 20 350 650 140 120Rd 36 63 31,5 400 800 200 160Rd 42 80 40 500 1000 240 180

Rd 52 125 62,5 600 1200 280 200

© 2004 Copyright PFEIFER, 87700 Memmingen / Technical changes and errors excepted. Status 11/2007 25

4. Transversal pull reinforcementThe PFEIFER Bar Anchors are made so that they can be installed in the headend side of thin concrete panels. They can be used to lift the horizontal pre-cast unit from a horizontal position into a vertical position (tilting) and thereaf-ter for transporting in an upright position. When tilting there is only half theload which occurs at vertical transport.

During tilting transversal pull occurs below an angle of inclination γ = 90°.The transversal pull component with transversal pull reinforcement, a specialreinforcement with cross bar, must be added into the concrete unit (Fig. 5).The transversal reinforcement should be fixed with the data clip. In Fig. 6 andTable 4 the transversal reinforcement with cross bar – is shown.

Table 4 – Transversal reinforcement

Size dS1 L h H dBr α B dS2

mm mm mm mm mm angle mm mm

Rd 12 6 270 23 35 24 15 280 8Rd 14 6 350 30 42 24 15 350 12Rd 16 8 420 33 49 32 15 400 12

Rd 18 8 460 39 55 32 15 450 12Rd 20 10 490 44 64 40 15 490 14Rd 24 12 520 51 75 48 15 550 14

Rd 30 12 570 68 92 48 15 580 16Rd 36 14 690 90 118 56 15 700 16Rd 42 16 830 111 143 64 15 850 20

Rd 52 20 930 134 174 140 15 1000 20

The apex of the transversal pull reinforcement which is held by the Data Clipmust have close contact with the Socket. This is most important!

5. Admissible anchor force with transversal pull, parallel shear pull and combined stressWith simultaneous parallel and transversal pulls, for instance when tiltingpanels (Fig. 8), only the transversal reinforcement must be installed whichalso controls the parallel shear pull.

Up to an angle of inclination γ =15° the transversal reinforcement is notnecessary. This happens, for instance, when lifting from a tilting table which isnot completely vertical (Fig. 7). Should additional parallel shear pull (two-leg-ged sling set) occur then the usual parallel shear reinforcement must beinstalled.With only parallel shear pull in the surface plane of the precast concrete unitthe same force adm. Fz is admissible for all directions of inclination β(β ≤ 45°) the maximum working load is the same in all directions of shear pull(Fig. 8). With transversal forces the lifting anchors have half the safe workingload compared to straight pull:

adm. FQ = 0,5 · adm. FZ

Because only half the weight of precast units have to be lifted, this is not areduction of anchor capacity. If the lifting anchors are dimensioned to lift theprecast unit vertically, then it is possible to erect the panel. This is possiblewith and without parallel shear pull (Fig. 8).It must be observed that parallel shear pull with an increasing angle of in cli -nation β – the active forces on the anchor increase in spite of the precastcon crete weight remaining the same. See point 4.2 of the “General InstallationInstructions for the PFEIFER Thread System.”

Figure 5

BSt 500 Sor stainless steel reinforcement

Precast unitplane

plane perpendicular to the precast unit planeadm. FQ=1/2 adm. FZ

adm

. FZ

adm

. FQ

Figure 8

Tiltingtable

Figure 7

Figure 6