| MEMORANDUM TO: | Project Engineers |
| Project Design Engineers | |
| FROM: | T. V. Rountree, P. E. |
| State Bridge Design Engineer | |
| DATE: | May 15,2000 |
| SUBJECT: | Beam Bolsters |
At the request of the Construction Unit and to better support the bottom mat of steel, detail 1¼" (32 mm) beam bolsters upper (BBU) in lieu of continuous high chairs for metal decks (CHCM) for all bridges using metal stay-in-place forms. The attached details show the orientation of the bar supports and are available for your use. The beam bolsters upper shall run longitudinally along the bridge and rest on the peaks of the stay-in-place forms. The beam bolsters upper shall have a maximum spacing of 4’-0" (1.2 m) as required by CRSI. Place the following note on the plans:
Provide 1¼" (32 mm) high Beam Bolsters Upper (BBU) at 4’-0" (1.2 m) centers atop the metal stay-in-place forms to support the bottom mat of ‘A’ bars.
This policy is effective as soon as is practicable, but no later than the September 2000 letting. The Design Manual will be updated at a later date.
TVR/JAD
Attachments
1. English "Superstructure - Slab Design".2. English "Superstructure - Slab Design".
1. Metric "Superstructure - Slab Design".
2. Metric "Superstructure - Slab Design".
