Seliem  compared old Egptian code (ECP 201-2003) with the new ECP 201-2012 (based on traffic load on bridges of EN 1991-2) by taking concrete I shaped, box shaped and composite girder stated that box girder
yield almost same in both the codes despite the increase in vehicular live loads of ECP 201-2012.
It requires a specific skill set and special equipment to build box girders
in-house, he adds, noting that beyond the fabrication line, Innovated Industrial has invested in a new automated welding process and uses AWS D14.
The deck is a hybrid, with a concrete deck and below, steel box girders
," Dragan said.
Experimental tests on 30 m long post-tensioned concrete box girder
In 2006 at BTU and in 2007 at CUT the experimental investigations of a steel knee joint and box girder
respectively strengthened with use of adhesives were carried out.
The case of box girders
is relatively simple, with plate geometries and non-complex propagation paths, a greater level of complexity occurs in steel-reinforced concrete bridge structures.
Because the sides of the box girders
are sloped, the girder top width would increase as the girder became deeper and the overhang would grow progressively narrower.
The single plane of stay cables is permitted by incorporation of precast delta frames that allow the otherwise independent box girders
to be supported in one central location.
In viaduct cross-section, there are two box girders
joined together by a monolithic reinforced concrete slab and transverse beams (diaphragms) at the supports and in the middle of the span.
AE sensors adopted were VS30-V flat response type (23-80 kHz bandwidth, 140 pF capacitance), a total of ten sensors were used and positioned on the lateral side of different segments of box girders
as shown in Fig.
The work will include replacing worn-out surfaces, viaduct deck repairs, strengthening steel box girders
and renewal of safety fencing.
Using concrete segmental box girders
allows for slender pier shapes and the smallest groundline footprint.