Other P11 R03
doneother_p11_r03
Detail6 objects · 10 measurements · 5 notes · 6 labels
This crop is a construction detail showing the recess formed at a precast beam end where a diaphragm bar terminates, including the 2" diameter through-hole, 1" cover dimension, 3" recess width, and a 5" diameter recess for the washer/nut assembly. Accompanying notes specify the diaphragm bar material and dimensions (1" diameter plain steel bar, ASTM A 709 Grade 36, threaded 5" each end), tightening reference, post-installation coating and epoxy grout fill requirements, and that galvanizing is not required. It documents the diaphragm bar end connection detail for precast beam diaphragms, not the overall beam or diaphragm layout.
Objects · 6
| Mark | Object | No. | Shape | Material | Note |
|---|---|---|---|---|---|
| Diaphragm bar | 1 | circular (round bar, threaded ends) | steel (ASTM A 709 Grade 36) | 1" diameter plain bar, threaded 5" on each end; shown in recess at beam face | |
| Recess hole | 1 | circular | 2" diameter hole through beam for diaphragm bar | ||
| Washer | 1 | circular (annular) | steel | 1/4" x 3-1/2" diameter washer at bar end | |
| Hex nut | 1 | hexagonal | steel | hex nut on threaded end of diaphragm bar | |
| 3S1 | Reinforcement bar group (4-3S1) | 4 | bar (rebar) | reinforced concrete reinforcement (steel) | 4 bars marked 3S1 spaced at 4" each way near recess |
| Beam face / recess pocket | 1 | rectangular recess in beam end | precast concrete | recess formed at beam face to accommodate diaphragm bar end, washer, nut; later filled with epoxy grout |
Measurements · 10
| Measurement | Value | Unit | Applies to |
|---|---|---|---|
| Clear cover to hole | 1 | in | 2" diameter hole |
| Recess width | 3 | in | recess pocket at beam face |
| Hole diameter | 2 | in | hole for diaphragm bar |
| Bar spacing group | 4-3S1 AT 4" | in | 3S1 reinforcement bars |
| Washer/nut recess diameter | 5 | in | recess diameter (DIA.) around washer/nut |
| Diaphragm bar diameter | 1 | in | diaphragm bar |
| Thread length each end | 5 | in | diaphragm bar ends |
| Washer thickness | 1/4 | in | washer |
| Washer diameter | 3 1/2 | in | washer |
| Cut-off distance from beam face | 1 | in | excess diaphragm bar cut-off |
Labels
RECESS DETAIL FOR DIAPHRAGM BAR ENDS2" DIAMETER HOLE4-3S1 AT 4" EACH WAY1" CL.3"5" DIA.
Notes
- DIAPHRAGM BAR SHALL BE A 1" DIAMETER PLAIN BAR, THREADED 5" ON EACH END, WITH 1/4" X 3 1/2" DIAMETER WASHERS AND HEX NUTS (ASTM A 709 GRADE 36).
- TIGHTEN DIAPHRAGM BAR AS PER SUB-SECTION 507.3.05.C OF THE GEORGIA DOT SPECIFICATIONS.
- AFTER EXCESS DIAPHRAGM BAR HAS BEEN CUT OFF, PAINT DIAPHRAGM BAR, WASHER, AND NUT EXPOSED IN RECESS WITH SPECIAL PROTECTIVE COATING NO. 2 P AS PER SECTION 535 OF THE GEORGIA DOT SPECIFICATIONS. AFTER PAINTING, FILL THE RECESS WITH AN APPROVED EPOXY GROUT.
- GALVANIZING OF THE DIAPHRAGM BAR AS PER SUB-SECTION 865.2.01.B.12 OF THE GEORGIA DOT SPECIFICATIONS IS NOT REQUIRED.
- CUT OFF EXCESS DIAPHRAGM BAR 1" FROM BEAM FACE.
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