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- Diaphragm hole sizes and locations
Standard sized diaphragm holes (see fig 1 & 2) for each beam type are located at regular spacings as shown. Adoption of these standard hole sizes and locations will allow a reduction in production cost of the beams.
- Skewed Beam Ends
Skewed ends to beams are expensive and should be avoided where possible. Specification of beam ends with the precise angle of skew to suit the bridge alignment generally increases the beam cost. Where skewed ends are necessary, the use of the 'rationalised skew angles' shown in the table below will help reduce beam costs with no disadvantage to the designer. The use of the rationalised skew angles below ensures that the maximum displacement 's' of the corners of the beams (see figure below) does not exceed 50 mm for M beams.
- Reinforcement in Skewed Beams
Only reinforcement in the end zone of the beam should be skewed. All other reinforcement in the body of the beam should be detailed square to the section.
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| 1 |
2 |
3 |
| Rationalised Skew angle at beam end |
Maximum 'S' (mm) for intermediate skew angles for M-beams* |
Skew angle at S max |
| 0� |
44 |
5.0� |
| 10� |
45 |
15.1� |
| 20� |
49 |
25.3� |
| 30� |
40 |
34.0� |
| 37.5� |
44 |
41.5� |
| 45� |
50 |
49.0� |
| 52.5� |
50 |
56.0� |
| 59� |
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| Example: Actual angle = 27.5�: Use of Column 3 indicate that a skew angle of 25.3� corresponds to a displacement S of about 50mm. To limit displacement S to below 50mm, use a rationalised skew of 30�.
* For Inverted tee beams, the value of 'S' is half that in column 2. |
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It is our policy to continuously review and improve products and their design.
Information in this leaflet is subject to change without notice. |
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It is our policy to continuously review and improve products and their design.
Information in this page is therefore subject to change without notice.
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HUME CONCRETE MARKETING SDN BHD (8411-T)
Level 2, Bangunan Pan Global,
No. 1A, Jalan Tandang,
P.O.Box 21, 46700
Petaling Jaya, Selangor.
Hot-line: (603) 7785 5282
Tel: (603) 7783 3068
Fax: (603) 7785 1823
E-mail: Adam Hussein (HIMB-PJ)
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| Hume Concrete Factories: |
Beranang
Lot 6-9, Beranang Industrial Estate,
43700 Beranang, Kajang,
Selangor Darul Ehsan.
Tel: 03-8766 7831/2/3/4
Fax: 03-8766 7830 |
Kuantan
No. 46, Semambu Industrial Estate,
25350 Kuantan,
Pahang Darul Makmur.
Tel: 09-566 1427/1482
Fax: 09-566 3668 |
Pasir Gudang
Plot 244, Jalan Emas,
81700 Pasir Gudang,
Johor Darul Takzim.
Tel: 07-251 2695/3000
Fax: 07-251 2477 |
Prai
Lot 236-239, Lorong Perusahaan 8,
Prai Industrial Estate,
13600 Prai, Penang.
Tel: 04-390 6216/6488
Fax: 04-399 3421 |
Sabah
5th Mile, Tuaran Road,
P.O.Box 10339,
88300 Kota Kinabalu, Sabah.
Tel: 088-428 925/26
Fax: 088-422 473 |
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| Prestressed Concrete Beam | Page 1 | Page 2 | Page 3 | Page 4 | Page 5 |
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HUME CONCRETE MARKETING SDN BHD (8411-T)
Level 2, Bangunan Pan Global,
No. 1A, Jalan Tandang,
P.O.Box 21, 46700
Petaling Jaya, Selangor.
Hot-line: (603) 7785 5282
Tel: (603) 7783 3068
Fax: (603) 7785 1823
E-mail: Adam Hussein (HIMB-PJ) |
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