1. External links

Tridilosa is a very light and resistant, materials-efficient 3-D structure, made from steel and concrete and widely used in civil engineering. Tridilosa was invented by the Mexican engineer Heberto Castillo.

Among the most remarkable features of this structure is that it can save up to 66% on concrete usage and up to 40% on steel, because filling with concrete is not required in the tension zone, only in the superior compression zone. It is so light that it can float on water, but is three times stronger than traditional construction flagstone. It was used, for example, to construct the 54-floor World Trade Center of Mexico City.

External links

• [https://www.ensayistas.org/critica/generales/C-H/mexico/castillo.htm Heberto Castillo Martinez]

• Athletics at the 2004 Summer Paralympics – Men's javelin throw F57
• Athletics at the 2004 Summer Paralympics – Men's javelin throw F58
• Athletics at the 2004 Summer Paralympics – Men's long jump F12
• Athletics at the 2004 Summer Paralympics – Men's long jump F13
• Athletics at the 2004 Summer Paralympics – Men's long jump F36-38
• Athletics at the 2004 Summer Paralympics – Men's long jump F42
• Athletics at the 2004 Summer Paralympics – Men's long jump F44
• Athletics at the 2004 Summer Paralympics – Men's long jump F46
• Athletics at the 2004 Summer Paralympics – Men's marathon T13
• Athletics at the 2004 Summer Paralympics – Men's marathon T51
• Athletics at the 2004 Summer Paralympics – Men's marathon T51–54
• Athletics at the 2004 Summer Paralympics – Men's marathon T52
• Athletics at the 2004 Summer Paralympics – Men's marathon T54
• Athletics at the 2004 Summer Paralympics – Men's pentathlon P13
• Athletics at the 2004 Summer Paralympics – Men's pentathlon P44
• Athletics at the 2004 Summer Paralympics – Men's pentathlon P54-58
• Athletics at the 2004 Summer Paralympics – Men's shot put F11–13
• Athletics at the 2004 Summer Paralympics – Men's shot put F32
• Athletics at the 2004 Summer Paralympics – Men's shot put F32–38
• Athletics at the 2004 Summer Paralympics – Men's shot put F36
• Athletics at the 2004 Summer Paralympics – Men's shot put F40
• Athletics at the 2004 Summer Paralympics – Men's shot put F42–46
• Athletics at the 2004 Summer Paralympics – Men's shot put F52-58
• Athletics at the 2004 Summer Paralympics – Men's shot put F52–58
• Athletics at the 2004 Summer Paralympics – Men's shot put F58