Hourdi Roofing
![](https://dev.earth-auroville.com/wp-content/uploads/2023/02/1-hourdis-test.jpg)
This technique is extensively used in Auroville since 1993. U-shaped CSEB are reinforced with reinforced cement concrete. Reinforcements vary with the span, but the rod diameter cannot exceed ø 12 mm for the Auram blocks 290 & 295 and ø 16 mm for the Auram blocks 240 & 245.
The U blocks are used as lost shuttering, but they also help the compressive strength of the beam. Hence it becomes a composite technique as the reinforced concrete work in tension and the U block works in compression. The concrete cast in the U shape is normally 1 cement: 2 sand: 4 gravel ½’. The vertical mortar in between the U blocks is cement sand mortar CSM 1: 3 of 1 cm thickness. Three types of beams have been developed, elaborated below.
Hourdi blocks on concrete T beams
![](https://dev.earth-auroville.com/wp-content/uploads/2023/02/2-hourdis-beam.jpg)
![](https://dev.earth-auroville.com/wp-content/uploads/2023/02/3-hourdis-beam.jpg)
![](https://dev.earth-auroville.com/wp-content/uploads/2023/02/4-hourdis-beam.jpg)
![](https://dev.earth-auroville.com/wp-content/uploads/2023/02/5-hourdis-t-beam.jpg)
Hourdi blocks on ferrocement channels
![](https://dev.earth-auroville.com/wp-content/uploads/2023/02/6-hourdis-channel.jpg)
![](https://dev.earth-auroville.com/wp-content/uploads/2023/02/7-hourdis-channel.jpg)
![](https://dev.earth-auroville.com/wp-content/uploads/2023/02/8-hourdis-channel.jpg)
Contact US
- Address:Auroville Earth Institute, Auroshilpam, Auroville 605 101 - T.N. India
- Phone:+91 (0) 413 - 262 3330 / 262 3064
- Email:info@earth-auroville.comOpens in your application