Structures Detailing Manual | Jan 2009
8 - Foundation Layout |

# 8 - Foundation Layout

## 8.1 General

A. This drawing shows a plan view of all spread footings, piling or drilled shafts and provides all information necessary for locating their positions in the field.

B. More than one sheet may be required.

C. See SDMEx-8, SDMEx-9a and SDMEx-9b.

## 8.2 Scales and Dimensions

A. See Chapter 2 for recommended scales and accuracy. Do not indicate the scale on the drawing. Select scales to provide 100% drawing legibility when reproduced to 11-inch x 17-inch prints. See the CPCH for additional information.

B. Reduce scales for the distances and exaggerate pile or shaft sizes when necessary for clarity (Refer to Section 2.9).

## 8.3 Orientation of Details

If the "Foundation Layout" details are to occupy one drawing, proportion to the sheet. Use the same orientation as is shown on the "Plan and Elevation" sheets.

## 8.4 Layout Details

Include the following:

A. Station line at the scale required for clarity (show north arrow).

B. A plan of the substructure foundations.

C. All horizontal curve data (or reference if shown elsewhere) including bearings of tangents.

D. Show all substructures stations on the Station Line. The substructure station is the intersection of the stationing line and the substructure centerline or begin/end of bridge.

E. Show on the station line, the angle between intersecting reference lines.

1.) For bridges with straight (tangent) alignment, show the complementary skew angle.

2.) For bridges with a single horizontal curve, show the angle between the substructure centerline and the tangent to the station line.

3.) For bridges with multiple horizontal curves, horizontal curves and tangents, spiral curves or other complex alignments, use coordinates to locate working (control) points for the substructure along the centerline of intermediate supports (piers or bents) or Begin/End Bridge. Tie coordinates to the Florida State Plane Coordinate System.

F. Show the distance between the working (control) point and adjacent pile clusters, the center of footings, drilled shafts, or individual piles. In addition:

1.) Other foundation units may be dimensioned from above or adjacent foundations.

2.) Dimension pile spacing within a cluster or concrete boundaries for footings.

3.) Show the Direction of Stationing adjacent to the station line preferably at the extreme ahead or back station.

4.) Show all overhead and underground utilities and existing foundations in the vicinity and offset dimensions if applicable.

## 8.5 Numbering Foundation Units (01/09) 2009 Jan: Deleted paragraphs B,C and D. regarding numbering and the Bridge Inspectors Manual.

Number piles in each bent or pier sequentially, beginning with "1" from left to right when facing in the Direction of Stationing, then from extreme back station to extreme ahead station in the Direction of Stationing.

## 8.6 Piling, Drilled Shafts and Spread Footings

A. Show the following information:

1.) Sizes - The size of the foundation unit.

2.) Batter - The amount and direction of battered piling.

3.) Test - The size, number, length and location of test piles or other foundation type.

4.) Scour Notes.

5.) Pile or Drilled Shaft Installation Tables. See SDMEx-8, SDMEx-9a and SDMEx-9 .

a. Maximum Load - The design pile/shaft load or design footing pressure.

b. Summary of Pile Lengths - If pile lengths are authorized.

c. Pile cut-off elevations - Elevation of pile head.

d. Minimum Tip Elevations - Minimum elevation of pile tip.

e. Drilled Shafts - Head and tip elevations.

B. See SDG 3.5 for additional Pile instructions and Plan Notes.

C. See SDG 3.6 for additional Drill Shaft instructions and Plan Notes.

## 8.7 Title Block

The sheet title is "FOUNDATION LAYOUT".