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Prestressed girder for concrete bridges with an incorporated concrete overhang and vertical stay-in-place form and method for using same |
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Jorge D. Hinojosa, Freddie C. Birck, Randall Frerich |
2011-12-20 |
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Combination retaining wall and method of construction |
Johann Hofmann, Freddie C. Birck |
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Combination column and panel barrier system and method of construction |
Freddie C. Birck, Johann Hofmann |
1996-04-23 |
| 5471811 |
Combination traffic barrier and retaining wall and method of construction |
Johann Hofmann, Freddie C. Birck |
1995-12-05 |
| 5400563 |
Combination column and panel barrier system and method of construction |
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1995-03-28 |
| 5131786 |
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| 4964750 |
Traffic barrier and method of construction |
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| 4961293 |
Precast, prestressed concrete secondary containment vault |
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