AMACCAO brand Prestressed Hollow core slabs

Hollow core floor panels are a product that replaces solid floor panels and foam floor panels in factory and workshop construction. They have many outstanding advantages, especially the ability to save materials, save costs, and exceed large spans and apertures. Currently, Chau Au Nam is the most modern factory capable of producing this product.

1. Specifications

1.1. Slab Geometry and strand positions

Slab Geometry and strand positions H=150 6 holes

Slab Geometry and strand positions H=200 6 holes

Slab Geometry and strand positions H=250 6 holes

1.2. Load table – Maximum Span (m)

Strand Pattern Code Strand Pattern Descrip. Steel Area (mm2) Mrd (kNm/1,2m) Service Load (kN/m2)
2,0 3,0 4,0 5,0 6,0 7,0 8,0 9,0 10,0 11,0 13,0 15,0
Prestressed Hollow core slabs H=150 6 holes
S1 4 3/8” 208,0 38,14 6,73 5,98 5,43 5,01 4,68 4,40 4,17 3,97 3,80 3,65 3,39 3,18
S1 7 3/8” 364,0 62,51 8,61 7,65 6,95 6,42 5,99 5,64 5,34 5,08 4,86 4,56 3,97 3,52
S3 4 3/8” + 3 1/2” 487,0 80,06 9,04 8,45 7,87 7,26 6,78 6,38 5,98 5,44 5,00 4,62 4,02 3,56
S4 2 3/8” + 5 1/2” 569,0 91,17 9,27 8,65 8,16 7,75 7,23 6,71 6,03 5,49 5,04 4,66 4,05 3,59
S5 7 1/2” 651,0 101,72 – – – 7,91 7,56 6,76 6,08 5,53 5,07 4,69 4,08 3,62
Prestressed Hollow core slabs H=200 6 holes
S1 4 3/8” 208,0 57,28 7,82 7,02 6,43 5,96 5,59 5,27 5,01 4,78 4,58 4,40 4,10 3,85
S2 7 3/8” 364,0 98,29 10,25 9,20 8,42 7,81 7,32 6,91 6,56 6,26 5,99 5,76 5,09 4,53
S3 4 3/8” + 3 1/2” 487,0 126,44 11,63 10,44 9,55 8,86 8,30 7,83 7,44 6,97 6,41 5,94 5,18 4,60
S4 2 3/8” + 5 1/2” 569,0 144,39 12,06 11,15 10,21 9,47 8,87 8,37 7,72 7,04 6,48 6,00 5,23 4,65
S5 7 1/2” 651,0 161,75 12,36 11,58 10,80 10,02 9,39 8,64 7,80 7,11 6,54 6,06 5,28 4,69
Prestressed Hollow core slabs H=250 6 holes
Strand Pattern Code Strand Pattern Descrip. Steel Area (mm2) Mrd (kNm/1,2m) Service Load (kN/m2)
3,0 4,0 5,0 6,0 7,0 8,0 9,0 10,0 13,0 15,0 18,0 20,0
S1 7 3/8” 364,0 128,6 10,1 9,30 8,67 8,15 7,72 7,34 7,02 6,73 6,05 5,70 5,27 5,03
S2 9 3/8” 468,0 163,6 11,39 10,50 9,78 9,19 8,70 8,28 7,92 7,60 6,83 6,43 5,69 5,21
S3 12 3/8” 624,0 209,9 12,91 11,89 11,08 10,42 9,86 9,38 8,97 8,61 7,73 6,94 5,96 5,45
S4 17 3/8” + 2 3/8”(top) 988,0 267,3 13,25 12,61 12,09 11,64 11,13 10,59 10,12 9,71 8,60 7,64 6,56 6,00
S5 6 1/2” + 7 3/8” + 4 3/8”(top) 1130,0 325,0 13,57 12,91 12,39 11,91 11,50 11,13 10,80 10,51 8,96 7,96 6,83 6,24

The values of load and span in the above table may be increased in the following cases:

  • Cast in situ topping that creates a composite section;
  • Part or all of the hollow cores are filled with concrete according to needs;
  • Partially restrained or continuous floor;
  • The superimposed service load comprises a value of 1.00kN/m2 as Dead Load for Prestressed Hollow core slabs H=150 6 holes, H=200 6 holes;
  • The superimposed service load comprises a value of 1.00kN/m2 as Dead Load for Prestressed Hollow core slabs H=250 6 holes.

1.3. Inertial properties of cross section and material specifications

No. CHARACTERISTIC SPECIFICATIONS UNIT
1 Strength of concrete at 28 days 45 Mpa
2 Strength of concrete at transfer 30 Mpa
3 Concrete density 2.400 kg/m3
4 Ultimate strength of steel 1.860 Mpa
5 Jacking stress of steel 1.302 Mpa

1.4. Resistance to fire – Bending Moment Mrdf (kNm/1.2m)

Strand position (mm) Exposure duration S1 S2 S3 S4 S5
Prestressed Hollow core slabs H=150 6 holes
30 60 22,96 39,73 52,65 61,12 69,48
35 90 17,12 29,70 39,44 45,84 52,17
Prestressed Hollow core slabs H=200 6 holes
30 60 37,53 65,10 86,46 100,49 114,38
35 90 29,88 51,92 69,05 80,32 –
Prestressed Hollow core slabs H=250 6 holes
30 60 84,7 108,3 143,4 219,0 271,2
35 90 67,9 87,0 115,3 180,2 223,4
40 (S1,S2,S3) / 35 (S4,S5,S6) 120 60,1 77,0 102,1 139,1 171,4

1.5. Load Capacity

 Bearing Capacity Diagram (H=150 6 holes)

 Bearing Capacity Diagram (H=200 6 holes)

 Bearing Capacity Diagram (H=250 6 holes)

2. Advantages

  • Broad range of application in commercial, industrial and residential buildings;
  • Large spans can be covered with slender elements able to withstand high overloads.
  • Low water/cement ratio in the concrete used grants the elements a high rigidity, also with high slenderness (up to 1/42), and thus reduces deformations to the minimum even with the simply supported structural scheme;
  • Possibility to use the elements with different supporting structures such as concrete block walls, steel beams, in-situ cast beams, precast beams, etc.;
  • It is possible to have a continuous reinforcement link between elements against negative moments, allowing therefore optimal static conditions even in seismic areas;
  • Self-supporting capacity at construction phase: this allows to avoid the use of props during erection. It is possible to load the floors immediately upon laying even without structural cast in situ topping;
  • Reduced amount of concrete for shear keys between slabs;
  • In case of thin elements, it is possible to use them as walls thanks to the male/female notch, these elements also can have an exposed aggregate surface finishing of different colors;
  • It is possible to produce slabs with increased thickness of the bottom which allows higher resistance to fire;
  • Simple and fast erection (3-4 workers can install up to 500/600 m2 of floor per day);
  • Maximum durability against carbonation obtained by means of the production technology which grants a homogeneous compacting of the concrete and therefore maximum impermeability and high mechanical strength;
  • Large daily quantities produced with constant and controlled quality;
  • High quality finishing of the elements and particularly the soffit which, most of the time, only requires coating or painting.

3. Application

  • The intended use of the Prestressed Hollow core slabs H=150, 6 holes is residential;
  • The intended use of the Prestressed Hollow core slabs H=200, 6 holes and Prestressed Hollow core slabs H=250, 6 holes is the office.

4. Additional parameters for high fire rates study

  • Aggregate type: limestone; Cement type 52.5R;
  • Concrete with accelerated curing and protected against dehydration;
  • Consequence Class: CC2 (medium risk) and Exposure class: XC1;
  • The shear resistance under fire event is not considered because it’s strongly affected by the number of cores that are opened at the two heads and filled at site by concrete and normal reinforcement.

5. Why you should choose AMACCAO?

– The first reason: AMACCAO always aims to provide leading modern technology solutions to create products:

  • Bearing high quality, reaching international standards;
  • Ensure the structure, safety for the work;
  • Ensuring the landscape, architecture;
  • Helps to shorten construction time;
  • Bring high economic efficiency.

– The second reason: With outstanding production capacity, AMACCAO is ready to supply a variety of components with a large number of components for investors, general contractors for construction of civil, industrial, irrigation and seaport works. domestic and international.

– The third reason: AMACCAO currently holds the No. 1 position in Vietnam in terms of both product quality, professionalism, and fast shipping, and construction services.

– The fourth reason: AMACCAO continuously won awards for brand reputation, becoming a familiar partner of leading contractors and real estate investors in Vietnam and foreign companies such as Coteccons, Vingroup, etc. Sungroup, CDC Hanoi, Samsung Engineering, Hyundai E&C, Ghella, Tokyu, Shimizu Corporation…

Hình ảnh thực tế tấm sàn rỗng Hollow core thương hiệu AMACCAO

Contact and request a quote

To receive the most suitable and professional advice for your project, contact CHAU AU NAM Company immediately by calling the Hotline: (+84) 96 807 3208 | (+84) 968 4444 61.

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