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DN: CK: DW: CK:FILE:
JOB
COUNTY
SECT
DIST
REVISIONS
TxDOT TxDOT TxDOT TxDOT
HIGHWAY
SHEET NO.
C TxDOT
of this standard to other for
mats or for incorrect results or da
mages resulting fro
m its use.
kind is
made by
Tx
DO
T for any purpose
whatsoever.
Tx
DO
T assu
mes no responsibility for the conversion
The use of this standard is governed by the "
Texas
Engineering
Practice
Act".
No
warranty of any
DI
SC
LAI
ME
R:
CONTMarch 2015
FI
LE:
DA
TE:
StandardDivision
OperationsTraffic
MS(1)-15 ms-15.dgn
57A
SHEET 1 OF 7
Point
Tangent
Point
Tangent
1'-6"
d
0.46d
0.54d
C
Point
Tangent
1'-3"
Min
‰
G
•"
2 •
"
Min
1'-3"
3" x ‚"
Ring
Backing
shop splice. (Typ)
Detail" for allowable
See "Backing Ring
splice location.
Optional shop
= 90° +0°/-1°
2
GENERAL NOTES:
1
B-U2a
= 11' Typ
3
(Typ)
14'
(Typ)
14'
3Span Length = 40' Min
130' Max
102' Max 0.968" Max50'
Max 0.968"
Max
2013
For span lengths and post heights falling between those shown in
90
Design height is up to 75 ft.
sign bridge.
Form elbows for tubular frame by hot bending methods
For each seam-welded pipe, locate a longitudinal seam weld
Construct foundations in accordance with Item 416, "Drilled Shaft
Foundations". Use Class C concrete. Use Grade 60 reinforcing steel.
Shop assemble posts and arms in accordance with Item 441. During
shop assembly, first bring all field splices to a snug tight
4 4
Design
Height
= 75'
Max
3'-0" Typ
1'-3" Min
L Arm
2' 5' Max
(Typ)
Elbow
Designed according to AASHTO Standard Specifications for
Structural Supports for Highway Signs, Luminaires, and Traffic
Signals.
Design wind speeds are 130
condition with the required bolts in all holes through each ply
in the connection. Then verify camber and span length prior to
mph and mph (3-second gust wind speed).
Sign Placement
Extreme Limit of
Bend Radius
Degree of Bend
partial bolted connection)
Field Splice ~ Typ (Showing only
Sign Placement
Extreme Limit of
Range of Sign Position
Total Arm Length = 12' Min, Pipe Size = 24" O.D., Thickness = 0.375" Min
5' spacing max
S4x7.7 Bracket at
(Typ)
on SHEET 2 of 7.
at Arm" detail
See "Handhole
Handhole.
6" x 4 •"
Post
Ht
= 15'
Min,
Pipe
Size
= 24"
O.
D.,
Thickness
= 0.375"
Min
(Typ)
on Sheet 4 of 7.
at Post" detail
See "Handhole
Handhole.
6" x 4 •"
and light fixture details as applicable.
See SB(SWL-1), SWW(1), SL(MV) for walkway
Splice
2
Equal
Pieces, if applicable
the Design Tables on Sheets 5 & 6 of 7, use the design information
for the longer span and/or taller post height.
Each structure is designed to support signs of equivalent area
to a 10 ft deep sign panel over 75 percent of the span length.
per ft for walkway, all placed as specified for the design sign
panel. Dynamic message sign (DMS) is NOT considered in the
design. Engineer approval is required to use DMS as part of the
sign panel.
the range of sign postion as necessery to produce maximum stress.
The analyses are based on locating an equivalent area within
Ensure base plate elevations are equal on each side of the overhead
5 ft from field splice. Design includes 3 lbs per square ft for
sign panel, 20 lbs per ft for lane control signal (LCS) and 50 lbs
Place sign panel such that the overlap onto elbow does not exceed
which do not crimp or buckle the interior radius of pipe bend,
and do not change the physical characteristics of the material.
accommodate 1 1/2 inch threaded couplings and CGB connectors for
Obtain Engineer's approval for the locations of drilled holes that
Fabricate and weld in accordance with Item 441,"Steel Structures",
AWS D1.1 Structural Welding Code, and the details shown on the plans.
disassembly. Demonstrate to the Engineer that the preassembled
1 inch (+/-) of the field measured span length of foundations.
on Sheets 5 and 6 of 7 indicate those designs are not available.
Missing specified span length and post height from the Tables
(Socket or Ground Sleeve)between post and base plate.
thickness in accordance with specified connection type
members from Sheets 5 and 6 of 7. Select applicable pipe
Determine minimum design pipe thickness for both post and arm
An arm consisting of up to four sections is permissible.
cord and cable fitting on the arm.
under backing ring.
galvanizing process, drain acid to prevent acid entrapment
"Galvanizing" after fabrication unless noted elsewhere. During
Galvanize all steel parts in accordance with Item 445,
length of the frame in the no load condition is within
plates.
frame to avoid distortions or changes in span length between base
If the tubular frame is erected as one unit,adequately suspend the
Min
2'-3"
2'-3"
at the neutral axis during the bending process. Bend elbow in
accordance with TPA-IBS-98 "Recommended Standards for Induction
Bending of Pipe and Tube."
1
2
3
Adjust arm length to accomodate the span length shown
on the structural layout sheet.
position all signs so that the bottom edges are 0.46 of
4
COMPONENT
MATERIAL DATA
ASTM
DESIGNATION
MIN.
YIELD
(ksi)
Connection Bolts
Anchor Bolts
U Rods
Anchor Bolt Templates
A572 Gr.50, A36
or A588
A325
F1554 Gr 55,
A307
A36
F436
35
36
92
55
36
Arm & Post PipeA53 Gr.B,Type E or
S or A106 Grade B
A563, or
A194 Gr 2H
A193-B7
Hardened Washers
the depth of the deepest sign below the centerline of mast arm.
thicknesses, and weld sizes for various span lengths.
design details such as post height, pipe wall
See Monotube Design Tables on Sheets 5 & 6 of 7 for specific
applicable designs.
post heights and thicknesses. See Sheets 5 & 6 of 7 for
portion of post. This splice is only applicable on certain
Extra optional shop splice at mid height of straight
Ground Sleeve, and Backing Ring
Base Plate, Handhole FrameWhen signs of different depths are used, aligning the bottom
edges of all signs is permissible. Where this is done,
Heavy Hex (H.H.) Nuts
terrain
elevation of surrounding
Natural ground or average
ELEVATIONBase Plate
Bottom of
(SPAN)
SIGN STRUCTURE
MONOTUBE
DN: CK: DW: CK:FILE:
JOB
COUNTY
SECT
DIST
REVISIONS
TxDOT TxDOT TxDOT
HIGHWAY
SHEET NO.
C TxDOT
of this standard to other for
mats or for incorrect results or da
mages resulting fro
m its use.
kind is
made by
Tx
DO
T for any purpose
whatsoever.
Tx
DO
T assu
mes no responsibility for the conversion
The use of this standard is governed by the "
Texas
Engineering
Practice
Act".
No
warranty of any
DI
SC
LAI
ME
R:
CONT
ms-15.dgn
March 2015
FI
LE:
DA
TE:
TxDOT
StandardDivision
OperationsTraffic
MS(2)-15
SHEET 2 OF 7
MONOTUBE
SIGN STRUCTURE
57B
C
C
C
ƒ" x ƒ" barƒ" x ƒ" bar ƒ" x ƒ" bar
2 •
"2 •
"
6" 6"
C
6"6" 6"6"
C
5"
6"
1'-6"
Typ
†"
2"
‚
L
‚
L of ArmC
Face of Sign
Coupling
Threaded
1 •" Dia
+/- 1°
30°
Handhole
1'-6"
‚
Arm ~ 2 •"
Arm ~ 2 •"
Post ~ 3 •"
Post
Arm
LFlange P
Arm
Flange P
Post
L
L
Radius
2 ‚"
1"
…
"
CJP
SECTION
1 ‚"
2"
LFlange P
Post
(at Post Flange Plate)
1 •"+/-
LFlange P
Arm
1"
WELD DETAIL"
See "ARM
(at Post Flange Plate)
See "POST WELD DETAIL"
102' Max 0.968" Max
d
b
(Socket Type Connection)
(ƒ x …)
ƒ"
5
6
3
3
Typa
(1 x b)
3
Arm
c
(1 ‚ x d)
Typ 3
L Field Splice
(Typ)
at Arm" Detail
See "Handhole
Handhole.
6" x 4 •"
L Optional Field Splice L Optional Field Splice
L Arm
L Field Splice
Handhole 6 x 4 •" Opening
Arm Wall
Screw, 4 Total
‚" Dia Cap
Matches Handhole
„" Thick Cover Plate
Thick
1" x 2" Frame
Wall
Arm
Opening
24 „"
Post Wall
Only on Sign Side
ƒ" x ƒ" Bar
Axis of Sign
Post Flange P 3 •"
Arm Flange P 2 •"
2'-5"
Bolt
Circle
2'-0 „
"
Opening
2'-10"
Width
1" Dia bolts
28 equally spaced
1 „" Dia Holes for
Total Arm Length = 12' Min, Pipe Size = 24" O.D., Thickness = 0.375" Min
Opening
24 „"
~
~
~
~
~~
~
See "COUPLING DETAILS"
1 •" Dia Threaded Coupling
3a
3c
4 •"
C
PLAN VIEW
3
(Socket Type Connection)
5
6
(4 Required)
for ‚" Dia x 1" Cap Screw
Drill and Tap at L Rim
lengths.
wall thicknesses, and weld sizes for various span
specific design details such as post height, pipe
See Monotube Design Tables on Sheets 5 & 6 of 7 for
either position as indicated is acceptable.
two (2) splices are allowed. Splice located at
A welded handhole frame is permissible. Maximum of
85% Minimum penetration
3
(SPAN)
(ARM DETAILS)
DN: CK: DW: CK:FILE:
JOB
COUNTY
SECT
DIST
REVISIONS
TxDOT TxDOT TxDOT
HIGHWAY
SHEET NO.
C TxDOT
of this standard to other for
mats or for incorrect results or da
mages resulting fro
m its use.
kind is
made by
Tx
DO
T for any purpose
whatsoever.
Tx
DO
T assu
mes no responsibility for the conversion
The use of this standard is governed by the "
Texas
Engineering
Practice
Act".
No
warranty of any
DI
SC
LAI
ME
R:
CONT
FI
LE:
DA
TE:
TxDOT
StandardDivision
OperationsTraffic
MS(3)-15
March 2015
57C
SHEET 3 OF 7
(SIGN SUPPORT DETAILS)
mc-15.dgn
ƒ"
2'-8"
1 ‚
"1 ‚
"
•" Clr
See DETAIL B
3 ƒ" 3 ƒ"
2 •" 2 •"
ƒ" ƒ"
S4X7.7
ƒ"
S4X7.7
‚
S4X7.7
ƒ"ƒ"
C
Clr
•"
C
C
C
C
C
1 ‚"
7 •"
and washer ~ Typ
†" Dia prevailing torque lock nut
~
S4X7.7
others located on arm.
Raise sign bracket on elbow to match
1'-2 ƒ
"1'-2 ƒ
"
WT9X32.5
7 †"
3 Ž" 3 Ž"
same plane
Face located on See DETAIL C
60°
1 ‚"
6 †"
…"
11 „
"
1 ‚
"
R = 12"
1'-3 •"
2'-8"
1 ‚
"
3 •
"
1 ‚
"
3 •
"
60
See DETAIL A
‚
1'-0
Š"
1'-0
Š"
1'-2 ƒ
"1'-2 ƒ
"
C
C
Typ
•" Clr Min
0.54
D
+/-
= 7'-5"
Max
0.46
D
+/-
= 6'-11"
Max
~
arm
C.G. of
walkway is selected.
only if light fixture or
Bracket extension required
PL ƒ"
S4X7.7
Plate detail.
Total of 4 ~ per assembly. See Stiffener
PL …"
7
12
8 8 9
8 8
10
8
9
10
11
12
7
Cont ƒ"x ƒ" Bar
Fit Pipe Curvature
WT9X32.5 - Cut to
L Pipe Elbow
†" Dia U Rod
L Arm
Fit Pipe Curvature
PL …" ~ Cut to
L Arm
Vertical
Bracket
L Mounting
L Arm
Horizontal
Bar
Cont ƒ"
Bolts
L •" Dia
Rod
L †" Dia
1 ƒ" Thread
S4X7.7 to be Flush
Top of Sign and
Clip ‚"
Arm
C.G. of
Sign Face
Typ
Post Clamp
Sign Panels
Extruded Aluminum
Bolts
L •" Dia
D
=
Sign
Depth
†" Dia U Rodof Post and Arm)
(Along Horizontal Portion
of Elbow)
(Along Curvature
(At Curvature of Elbow)
1 beveled washer and 1 lock washer
•" Dia bolt with 1 hardened washer,
See U Rod detail.
ƒ"
‚
C
Typ
~
~
R = 12"
1'-5"
PL …"
PL ƒ"
11
L Arm
Horizontal
Cont ƒ"x ƒ" Bar
to Clear Weld
Cope Š" Max
†" Dia Rod
Pipe Wall
(if applicable)
Walkway
(On Horizontal Portion of Post and Arm)
LCS (if applicable)
(SPAN)
SIGN STRUCTURE
MONOTUBE
DN: CK: DW: CK:FILE:
JOB
COUNTY
SECT
DIST
REVISIONS
TxDOT TxDOT TxDOT TxDOT
HIGHWAY
SHEET NO.
C TxDOT CONT
ms-15.dgn
March 2015
FI
LE:
DA
TE:
MS(4)-15
of this standard to other for
mats or for incorrect results or da
mages resulting fro
m its use.
kind is
made by
Tx
DO
T for any purpose
whatsoever.
Tx
DO
T assu
mes no responsibility for the conversion
The use of this standard is governed by the "
Texas
Engineering
Practice
Act".
No
warranty of any
DI
SC
LAI
ME
R:
StandardDivision
OperationsTraffic
SHEET 4 OF 7
(POST DETAILS)
SIGN STRUCTURE
MONOTUBE
57D
Point
Tangent
Point
Tangent
5"
6"
4 •"
6"
‚
†"
4"
‚
Base Plate
Bottom of
C
Plate
Base
C
PVC Conduit
1~1" Dia
1~2" Dia and
3'-0" Typ
1'-3" Min
Radius
1 •"
2 ‚"
C
…
"
CJP
PLAN VIEW
SECTION
3 •
"3 •
"
~
Base Plate 3 •"
30°
C
3
= 11' Typ
3
Shaft
Drilled
See Sheet 7 of 7 for foundation details.
= 90° +0°/-1°
(ƒ x …)
ƒ"
14
15
5
6
14
15
13
13
5
6
See Sheet 2 of 7
Plate 3 •"
Post Flange
on Sheet 2 of 7
(at Post Flange Plate)
See "POST WELD DETAIL"
L of Handhole
1 •" x 4" Frame
Screw, 4 Total
‚" Dia Cap
Thick
(4 Required)
for ‚" Dia x 1" Cap Screw
Drill and Tap at L Rim
Matches Handhole
„" Thick Cover Plate
2'-7"
Bolt
Circle
3'-2 "
Width
Opening
Axis of Handhole
Traffic Direction
Threaded Nipples
L 1" Dia Internal
2 ‚" Dia Anchor Bolts
16 Equally Spaced
2 Œ" Dia Holes for
Opening
Handhole 6" x 4 •"
WallPost
Sign Side
Only on
ƒ" x ƒ" Bar
Degree of Bend
Bend Radius
L Arm
thicknesses, and weld sizes for various span lengths.
design details such as post height, pipe wall
See Monotube Design Tables on Sheets 5 & 6 of 7 for specific
plate.
See Sheets 5 & 6 of 7 for the opening dimension in base
connection details.
See Sheets 5 & 6 of 7 for post to base plate
Nipple Details"
See "Internal Threaded
at each post
(30° apart)
Threaded Nipples
2~1" Dia Internal
1'-6"
applicable)
(When
Ground Sleeve
PostTraffic Direction
either position as indicated is acceptable.
two (2) splices are allowed. Splice located at
A welded handhole frame is permissible. Maximum of
85% Minimum penetration
Post
Ht
= 15'
Min,
Pipe
Size
= 24"
O.
D.,
Thickness
= 0.375"
Min
50'
Max 0.968"
Max
2'-3"
INTERNAL THREADED NIPPLE DETAILS
‰
‰
Threaded Nipple
1" Dia Internal
•"
(Typ)
(SPAN)
DN: CK: DW: CK:
JOB
COUNTY
SECT
DIST
TxDOT TxDOT TxDOT TxDOT
HIGHWAY
CONT
FI
LE:
DA
TE:
of this standard to other for
mats or for incorrect results or da
mages resulting fro
m its use.
kind is
made by
Tx
DO
T for any purpose
whatsoever.
Tx
DO
T assu
mes no responsibility for the conversion
The use of this standard is governed by the "
Texas
Engineering
Practice
Act".
No
warranty of any
DI
SC
LAI
ME
R:
FILE:
C TxDOT
ms-15.dgn
March 2015
StandardDivision
OperationsTraffic
SHEET NO.
57E
MS(5)-15
SHEET 5 OF 7
MONOTUBE
SIGN STRUCTURE
(SOCKET/SOCKET CONNECTION
DESIGN DETAILS)
REVISIONS
X Y X
‚ •
Total Arm Length
at Post
Field Splice
in table are minimum required.
Note: X and Y values shown
17
18
16
20
19
Sheet 4 of 7 for all other base plate details.
Showing Base Plate opening dimension only. See
Connections) on Sheet 6 of 7 for design details.
See Monotube Design Tables 2A and 2B (Socket/Ground Sleeve
See Dead Load Camber Diagram.
for weld sizes of the various spans and post heights.
See Monotube Design Tables 1A and 1B (Socket Connections Only)
An extra optional splice in the straight portion
of the post is permissible. Splice the post at mid height
creating two equal pieces spliced together.
Height
Post
15'
40'
20'
30'
40'
50'
Sizes
Arm Weld
Plate)
Sizes(Base
Post Weld
Flange Plate)
Sizes (Post
Post Weld
a b c d e f X Y
0.375" 0.375"
0.375" 0.375"
0.375"
0.375"
0.375"
‰ ‚
‰ ‚
‰ ‚
‰ ‚
‰ ‚
Š"
Š"
Š"
Š"
Š"
Š"
Š"
•"
15'
50'
20'
30'
40'
50'
0.375" 0.375"
0.375" 0.375"
0.375"
0.375"
Š …Š"
Š"
Š"
Š"
Š"
Š"
•"
15'
60'
20'
30'
40'
50'
0.375" 0.375"
0.375" 0.500"
0.375" 0.687"
0.375" 0.968"
‹Š"
Š"
Š"
Š"
Š"
‹"
•"
•"
15'
70'
20'
30'
40'
50'
0.375" 0.375"
0.375" 0.500"
0.375" 0.968"
† Ž
† Ž
Œ
Š"
Š"
Š"
Š"
‹"
•"
15'
80'
20'
30'
40'
50'
0.375" 0.500"
0.375" 0.687"
0.375" 0.968"
ŽŠ"
Š"
Š"
‹"
•"
•"
15'
90'
20'
30'
40'
50'
0.375" 0.500"
0.375" 0.687"
Š"
Š"
‹"
•"
15'
100'
20'
30'
40'
50'
0.500" 0.562"
0.500" 0.968"
‹"
‹"
•"
•"
15'
110'
20'
30'
40'
50'
0.562" 0.687"
0.562" 0.968"
•"
•" •"
•"
15'
120' 20'
30'
0.687" 0.968" 3•" •" •"
15'130'
20'
0.968" 0.968" •" •" ƒ"
Pipe to Plate Connections
Socket
0.687" 0.968" •" •" •"
Š
Š
Š
‹
‹
‹
1 ˆ
Ž 1 ˆ
Ž 1 ˆ
(in)
Camber
Min Required
1 ˆ
1 ˆ
1 …
1 Š
1 •
1 Ž
1 •
1 •
2 ‹
2 …
2 ˆ
2 „ 3 „
2 • 3 •
Š"
Š"
Š"
Š"
Š"
Š"
Š"
Š"
Š"
Š"
Š"
Š"
Š"
Š"
Š"
•"
Š"
Š"
•"
Š"
‹"
•"
•"
Š"
Š"
•"
Š"
Š"
•"
Š"
‹"
•"
•"
Š"
Š"
•"
Š"
Š"
•"
Š"
‹"
•"
•"
Š"
Š"
Š"
Š"
‹"
•"
Š"
‹"
•"
Š"
‹"
•"
Š"
Š"
Š"
‹"
•"
•"
‹"
•"
•"
‹"
•"
•"
Š"
Š"
‹"
•"
‹"
•"
‹"
•"
‹"
‹"
•"
•"
•"
•"
•"
•"
•"
•"
•"
•"
•"
•"
•"
•"
•"
•"
•"
•"
•"
•"
•"
ƒ"
•"
19
19
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
16
Height
Post
15'
20'
30'
40'
50'
ArmElbow
Post &Sizes
Arm Weld
Plate)
Sizes(Base
Post Weld
Flange Plate)
Sizes (Post
Post Weld
a b c d e f X Y
0.375" 0.375"
0.375" 0.375"
0.375"
0.375"
0.375"
‰ ‚
‰ ‚
‰ ‚
‰ ‚
‰ ‚
Š"
Š"
Š"
Š"
Š"
Š"
Š"
•"
15'
20'
30'
40'
50'
0.375" 0.375"
0.375"
0.375"
0.375"
Š …Š"
Š"
Š"
Š"
Š"
Š"
•"
15'
20'
30'
40'
0.375" 0.375"
0.375" 0.500"
0.375" 0.687"
0.375" 0.968"
‹Š"
Š"
Š"
Š"
Š"
‹"
•"
•"
15'
20'
30'
40'
0.375"
0.375" 0.968"
Ž
Ž
Š"
Š"
Š"
•"
15'
20'
30'
0.375"
0.375"
0.375" 0.968"
ŽŠ"
Š"
Š" •"
•"
15'
20'
0.375"
0.375"
Š"
Š" •"
15' •"
Pipe to Plate Connections
Socket
Š
Š
Š
‹
‹
‹
Ž
(in)
Camber
Min Required
1 ˆ
1 ˆ
1 …
Š"
Š"
Š"
Š"
Š"
Š"
Š"
Š"
Š"
Š"
Š"
Š"
Š"
Š"
Š"
•"
Š"
Š"
•"
Š"
‹"
•"
•"
Š"
Š"
Š"
Š"
Š"
‹"
•"
Š"
Š"
Š"
Š"
Š"
‹"
•"
Š"
Š"
Š"
•"
Š"
Š"
Š" •"
•"
•" •"
Š"
Š" •"
•"
19
19
20
16
130 MPH WIND SPEED
MONOTUBE DESIGN TABLE 1A (SOCKET CONNECTIONS ONLY) MONOTUBE DESIGN TABLE 1B (SOCKET CONNECTIONS ONLY)
90 MPH WIND SPEED
1 •
1 ‹
Length
Span
…
…
Œ
Œ
Œ
Œ
Ž
ƒ" ƒ"
•" •" •" •"
•" •" •" •"
ƒ" ƒ"
•" •" •" •"
ƒ" ƒ"
•" •" •" •"
ƒ" ƒ"
•" •" ƒ" ƒ"0.968" 0.968"
0.562"
0.687"
0.687"
0.968"
0.968"
0.968"
…
…
Œ
Œ
Œ
Œ
Œ Ž
1 „
1 „
‡ 1 ‰
1 •
1 •
2
Elbow
Post &Arm
0.500"
0.687"
0.968"
0.375"
0.562"
0.968"
0.562"
‹" ‹"‹"‹"
•" •" •" •"
•" •" …
Œ
Œ
•" •" •" •"
0.500"
0.687"
0.968"
0.562"
0.968"
‹" ‹" ‹" ‹"
•" •" •" •"
•" •" •" •"
…
Wall Thickness
24" Dia Pipe
ƒ"ƒ"
Wall Thickness
24" Dia Pipe
20
40'
50'
60'
70'
80'
90'
100'
Length
Span
20
(SPAN)
Plate
Base
(at Base Plate)
WELD DETAIL"
See "POST
~
e
Plate
Base
Shaft
Drilled
Post
(Socket Type Connection)
(1 ‚ x f)
17
18
2'-0 „
"
Opening
Wall
Post
1 ‚
"
2"
L
(at Base Plate)
f
(Socket Type Connection)
Base P
17
Post Wall
Opening
24 „"
~ ~
e 17
DN: CK: DW: CK:
JOB
COUNTY
SECT
DIST
REVISIONS
HIGHWAY
SHEET NO.
CONT
ms-15.dgn
March 2015
FI
LE:
DA
TE:
StandardDivision
OperationsTraffic
TxDOT TxDOTTxDOT TxDOT FILE:
C TxDOT
of this standard to other for
mats or for incorrect results or da
mages resulting fro
m its use.
kind is
made by
Tx
DO
T for any purpose
whatsoever.
Tx
DO
T assu
mes no responsibility for the conversion
The use of this standard is governed by the "
Texas
Engineering
Practice
Act".
No
warranty of any
DI
SC
LAI
ME
R:
MS(6)-15
MONOTUBE
CONNECTION DESIGN DETAILS)
(SOCKET/GROUND SLEEVE
SIGN STRUCTURE
57F
SHEET 6 OF 7
Plate
Base
X Y X
‚ •
Total Arm Length
~
1'-0"
Plate
Base
Shaft
Drilled
1'-0"
Post
(Ground Sleeve Connection)
Post
A
A
Plate
Base
DETAIL D
DETAIL E
(Ground Sleeve Connection)
Wall
Post
‡
"
Wall
Post
Ring
Backing
Sleeve
Ground
Ring
Backing
tapered reinforcement.
Grind
Chip &
…"
g
…"
g
g
‚
24
(g x …)
(‡ x Š)
(g x …)
g
5" x ‚"
Ring
Backing
21
24
24Optional 1" Dia
Drain Holes for
Galvanizing
(Max 4)
22
22
16
23
19
21
details. See Sheet 4 of 7 for all other base plate details.
Showing Base Plate opening dimension and drain hole
Height
Post
15'
40'
20'
30'
40'
50'
ArmElbow
Post &
Sizes
Arm Weld
Flange Plate)
Sizes (Post
Post Weld
a b c d g X Y
0.375"
0.375"
‰ ‚
‰ ‚
Š"
Š"
15'
50'
20'
30'
40' 0.375" Š"
15'
20'
30'
40'
15'
70'20'
30'
40'
15'
80' 20'
30'
15'90'
20'
15'100'
Š"0.375"
Pipe to Plate Connections
Socket
(in)
Camber
Min Required
Š"
Š"
Š"
Š"
Sleeve
Ground
23
23
23
23
23
23
23
23
23
16
MONOTUBE DESIGN TABLE 2A (SOCKET/GROUND SLEEVE CONN.)
130 MPH WIND SPEED
60'
Length
Span
50'
23
23
23
23
23
23
Sleeve
Ground
at Post
Field Splice
0.687" •" •"
0.687" •" •" Š ‹
0.968" •" •" †
Opening
Wall
Post
in table are minimum required.
Note: X and Y values shown
Ground Sleeve
Base Plate
STEP 1
(b)Prepare post and ground sleeve.
(c)Weld post to base plate,
STEP 2
STANDARD WELD
Plate)
Size (Base
Post Weld
OPTIONAL WELD
~
Only) on Sheet 5 of 7 for design details.
See Monotube Design Tables 1A and 1B (Socket Connections
See Monotube Design Tables 2A and 2B for value of "g".
‚
(d)Position ground sleeve.
(e)Weld to base plate with
Wall Thickness
24" Dia Pipe
0.375" 0.375" Š" Š" Š" Š" ƒ" ‰ ‚
0.500" ‹" ‹" ‡"
1 ˆ"
0.375" 0.500" Š" Š" ‹" ‹" 1" Š …
0.375" 0.968" Š" Š" •" •" Š ‹
1 ˆ"
Ž
25
25
25
See Dead Load Camber Diagram.
An extra optional splice in the straight portion
of the post is permissible. Splice the post at mid height
creating two equal pieces spliced together.
chip and grind flush ( „" max radius.)
(a)Weld backing ring to post.
23
23
1 •"
1 •"
15'
40'
20'
30'
40'
50'
15'
50'
20'
30'
40'
50'
15'
60'
20'
30'
40'
50'
15'
70'
20'
30'
40'
50'
15'
80'
20'
30'
40'
50'
15'
90'
20'
30'
40'
50'
15'
100'
20'
30'
40'
50'
15'
110'
20'
30'
40'
50'
15'
120' 20'
30'
15'130'
20'
Length
Span
Height
Post Sizes
Arm Weld
Flange Plate)
Sizes (Post
Post Weld
a b c d g X Y
0.375" 0.375"
0.375" 0.375"
‰ ‚
‰ ‚
Š"
Š"
Š"
Š"
ƒ"
0.375" 0.375"
0.375" 0.375"
0.375" 0.375"
Š ‹
Š ‹
Š ‹
Š"
Š"
Š"
Š"
Š"
Š"
0.375" 0.375"
0.375" 0.375"
0.375" 0.375"
‹ Œ
‹ †
• †
Š"
Š"
Š"
0.375" 0.375"
0.375" 0.375"
† Ž
• ‡Š"
Š" Š"
Š"
0.375" 0.500"
0.375" 0.500"
Ž
‡Š"
Š" ‹"
‹"
0.500" 0.500" ‹"
0.562" 0.562" 2•"
0.687" 0.687" •"
0.500" • ‡Š" ‹"0.375"
0.562" • •Š" •"0.375"
0.562" ‡•" •"0.562"
0.687" ••" •"0.562"
0.562" •"0.500"
0.687" •"0.562"
0.968" •"0.562"
0.687" •"0.687"
0.687" •"0.687"
0.968" •"0.687"
0.968" •"0.968"
0.968" 2•"0.968"
0.968" •"0.968"
0.968" •"0.968"
0.968" •"0.968"
0.500" • †Š"0.375"
Pipe to Plate Connections
Socket
(in)
Camber
Min Required
1 „
1 ‰
1 ‚
1 ‚
1 „
1 „
1 ‰
1 „
1 •
1 †
1 †
1 †
1 ‹
1 •
1 Œ
1 Œ
2 ˆ
2 ‚
2 ‰
1 Ž
1 ‡
2 „
2 Œ
2 †
2 Ž
2 •
2 … 3 ‹
2 Ž 4 „
Š"
Š"
Š"
Š"
Š"
Š"
Š"
Š"
Š"
Š"
Š"
Š"
Š"
Š"
Š"
Š"
Š"
‹"
Š"
Š"
Š"
‹"
Š"
Š"
Š"
Š"
Š"
Š"
‹"
•"
Š"
Š"
•"
•"
‹"
‹"
•"
•"
‹"
‹"
•"
•"
‹"
‹"
•"
•"
‹"
•"
•"
•"
•"
•"
•"
•"
•"
•"
•"
•"
•"
•"
•"
•"
•"
•"
•"
•"
•"
•"
•"
•"
•"
•"
•"
•"
•"
•"
•"
•"
•"
•"
Sleeve
Ground
ƒ"
ƒ"
ƒ"
ƒ"
ƒ"
ƒ"
ƒ"
ƒ"
ƒ"
•"
1 ˆ"
1 ˆ"
1 ˆ"
1 ˆ"
1 •"
23
23
23
23
23
23
23
23
23
23
23
23
23
16
19
19
19
19
‡"
‡"
‡"
‡"
‡"
•"
1 ˆ"
•"
•"
MONOTUBE DESIGN TABLE 2B (SOCKET/GROUND SLEEVE CONN.)
90 MPH WIND SPEED
Plate)
Size (Base
Post Weld
0.375" 0.375" Š" Š" Š" Š" ƒ" ‰ ‚
1 •"
1 •"
1 •"
1 •"
1 •"
1 •"
Wall Thickness
24" Dia Pipe
ArmElbow
Post &
(SPAN)
Sleeve
…" Ground
Sleeve
…" Ground
Optional 4 ~ 1" dia vent holes placed in pipe and
backing ring to release pressure during galvanizing is
permissible. Stagger holes vertically in pipe to ensure all
4 holes are not in one cross-section.
sleeve with 100% longitudinal weld.
Maximum of 2 splices allowed at backing ring and ground
of this standard to other for
mats or for incorrect results or da
mages resulting fro
m its use.
kind is
made by
Tx
DO
T for any purpose
whatsoever.
Tx
DO
T assu
mes no responsibility for the conversion
The use of this standard is governed by the "
Texas
Engineering
Practice
Act".
No
warranty of any
DI
SC
LAI
ME
R:
FI
LE:
DA
TE:
DN: CK: DW: CK:FILE:
JOB
COUNTY
SECT
DIST
REVISIONS
TxDOT TxDOT TxDOT TxDOT
HIGHWAY
SHEET NO.
C TxDOT CONT
ms-15.dgn
March 2015
StandardDivision
OperationsTraffic
SHEET 7 OF 7
MONOTUBE
SIGN STRUCTURE
(FOUNDATION DETAILS)
MS(7)-15
2 ‚
"
= 4'-9"
Threaded
10"
Galvanized 1'-4"
LIGHTNING PROTECTION SYSTEM
‚" to •
"
3 ‚
"
Max
Template
Anchor Bolt
Template
No. 3 Bar
Base Plate
Bottom ofPlate
Base
18 ~ #11
3"
3" Cover
PVC Conduit
1~1" Dia
1~2" Dia and
~
Height
Post
15'
40'
20'
30'
40'
50'
Axial Moment Torsion Shear
(kips) (k-ft) (k-ft) (kips)
7
15'
50'
20'
30'
40'
50'
8
9
15'
60'
20'
30'
40'
50'
10
11
14
20 11
15'
70'
20'
30'
40'
50'
11 21
13
18
15'
80'
20'
30'
40'
50'
274
308
400
13 29
15 21
20 17
15'
90'
20'
30'
40'
50'
312
350
15 34
17 25
15'
100'
20'
30'
40'
50'
375
433
17 44
21 34
15'
110'
20'
30'
40'
50'
456
488
20 55
23 41
15'
120' 20'
30'
59525 73
15'130'
20'
69830 92
16
16
18 12
19 503 88 15
23 624 86 14
19 442 18
22 574 17
28 712 17
23 507 22
25 648 20
31 802 19
30 589 29
33 733 24
36 894 22
26 553 49
32 654 33
32 641 62
152
152
146
197
197
237
251
298
300
371
344
407
142
128
135
173
150
158
217
189
170
266
374
Post
Moment
100
Curve (k-ft)
300
500
700+
- -
WITH 48" DIAMETER
EQUATIONS FOR MONOTUBE CHART
26
26
26
(See
Load
Curves)
Height
Post
15'
40'
20'
30'
40'
50'
Axial Moment Torsion Shear
(kips) (k-ft) (k-ft) (kips)
7
15'
50'
20'
30'
40'
50'
9
15'
60'
20'
30'
40'
10
20
15'
70'20'
30'
40'
15'
80' 20'
30' 20
15'90'
20'
15'100'
134
Length
Span
Length
Span
35 •
"
Width
31"
Bolt
Circle
26 •
"
Opening
2 ‚" Dia Anchor Bolts
16 equally spaced
2 Š" Dia Holes for
Top of Foundation
Foundation
Top of
galvanized
need not be
and Embedded Nuts
Anchor Bolt Templates
204 67 16
8 257 57 14
382 49 14
15 515 46 14
652 47 15
256 20
320 91 18
13 474 85 17
19 636 92 18
22 892 25
308 154 24
389 150 22
15 565 139 21
754 139 21
12 387 245 31
14 473 236 27
19 676 226 25
22 892 201 25
14 445 357 36
17 549 360 32
774 322 28
17 536 489 44
19 621 463 36
24 638 499 61
for 10<x<30 (blows/ft)Blow Count Line Equation
y=51-0.8x
y=58.5-0.95x
y=63-x
for x>30 (blows/ft)Blow Count Line Equation
Height
Above
Ground
=6"
Min,3'-3"
Max
Anchor
Bolt
Length
and 2 Hardened Washers
each w/ 4 Heavy Hex Nuts
16 ~ 2 ‚" Dia Anchor Bolts,
‚" Thick Min.
Top Template
Œ" Thick Min.
Bottom Template
TOP OF DRILLED SHAFT DESIGN LOADS TOP OF DRILLED SHAFT DESIGN LOADS
90 MPH WIND SPEED 130 MPH WIND SPEED
y=39-0.5x119 33 11
8 27 9
14 251 22 7
10 189 24 8 11
20 316 23 8 21
150 51 14 9 107
169 44 11
12 237 41 9
18 314 44 9
13 389 25 9 201
182 74 17
211 72 14 12
286 67 12
374 67
460 44 11
218 104
253 102 17
348 108 14
438 73 13
546 68
listed for concrete encasement.
connectors that are UL
Provide Mechanical
one mechanical connector.
turns of No. 10 wire or
and wire tightly with ten
bottom template as shown
by bending No. 3 bar on
mechanical connectors or
with 1/0 jumper and two
Bond anchor bolts to rebar
for a post, and a special foundation design is required.
when the elevation is more than 3'-3" above finished grade
made equal. The Drilled Shaft Load Curves cannot be used
Ensure bottom of base plate elevations of each post are
y=33
y=30
y=27
y=24
10
15
20
40
30
50
Length (feet)
Drilled
Shaft
Embed
ment
y
Y894 = 33 ft (Drilled Shaft Embedment Length)
Solution
TCP blow count of 40 blows/ft
Moment = 894 k-ft
What is the Drilled Shaft Embedment Length for the following conditions:2.
Y253 = 38 ft (Drilled Shaft Embedment Length)
Round up to the nearest foot
Y253 = Y100 + R*(M253-M100) = 31.5 + 0.0375*(253-100) = 37.24 ft
R = (Y300 - Y100)/(M300 - M100) = (39-31.5)/(300-100) = 0.0375
Now interpolate between these to find Y for 253 k-ft
Moment = 300 k-ft Y = 51 - 0.8*15 = 39 ft
Moment = 100 k-ft Y = 39 - 0.5*15 = 31.5 ft
100 k-ft and 300 k-ft.
Need to interpolate between the equations for the moments of
X = 15 blows/ft
Solution
TCP blow count of 15 blows/ft
Moment = 253 k-ft
What is the Drilled Shaft Embedment Length for the following conditions:1.
Examples:
Ground
Existing
No. 11 Reinforcing Bar
the top
turns on
Three flat
3 •" pitch
#5 Spiral at
TOP AND BOTTOM TEMPLATE
2 ‚
"
6"
ANCHOR BOLT ASSEMBLY
Some bolts not shown for clarity
galvanized
need not be
embedded nuts
templates and
Anchor bolt
48" Dia
1'-0"
~
Length of
Embedded
Drilled
Shaft
(Typ)
3 sides
Tack Weld
the bottom
flat turns on
One and a half
3 •" pitch
#5 Spiral at
FOUNDATION NOTES:
48" Diameter Drilled Shaft Load Curves (kip-ft)
700+
500
300
100
100
300
500
700+
50403020
Value (blows per foot)
Texas Cone Penetrometer
x
each side of the overhead sign bridge.
to maintain an equal base plate elevation on
determined by the amount of build-up required
The height of foundation above ground is
20 ft.of
maintaining a minimum shaft embedment length
minimum rock penetration of 8 ft, while
Terminate shafts encountering rock with a
on the blow counts in the upper 20 ft of soil.
Determine foundation embedment length based
"Galvanizing".
galvanizing damage in accordance with Item 445,
to base plate in two (2) places. Repair
washer in two (2) places and tack weld washers
tightened, tack weld anchor bolt nuts to
final position and anchor bolts have been
After the structure has been aligned in its
* Moment Values in kip-ft
Interpolate moment values that are between two curves.
required for soil profiles with blow counts less than 10 bl/ft.
listed on this standard. A custom foundation design is
Use the foundation design curves only for the design loading
cases with a moment greater than or equal to 700 k-ft.
The 700+ curve is valid for designing foundations for load
was also taken into account.
design curves in the Drilled Shaft Load Curve plot, shear
range considered. While moment is used to represent the
shear controlled the length of the shafts for the blow count
applied moment, shear, and torsion. Moment combined with
Note: The Drilled Shaft Load Curves were developed in terms of
DIST
57G
(SPAN)
