TYPICAL STRINGER, GUARDRAIL AND HAND RAIL DESIGN
4'-0"
3'-6"
MAX
TREAD
4" MAX
PICKET TYPES
SQUARE TUBING
1/2"
5/8"
3/4"
1"
SQUARE BAR
1/2"
ROUND TUBING
1/2"
5/8"
3/4"
1"
ROUND BAR
1/2"
FRAMING TYPE
HSS (SQUARE TUBE)
1-1/2x1-1/2x1/8"
AISC HSS PIPE (ROUND)
1 1/4" SCHD 40
2x2x3/16"
1 1/2" SCHD 40
TOP RAIL -POSTS -KNEERAIL
MAX RISER
STRINGER TYPE
FLAT PLATE - 1/4" 3/8"
CHANNEL TYPES
- MC12x10.6
- C12x20.7
12" T
YP
.
TREAD TYPES
- CONCRETE PAN
- SMOOTH PLATE
- DIAMOND TREAD
- PRECAST OPEN RISER
- PRECAST CLOSED RISER
- BAR GRATING
HANDRAIL TYPE
PIPE 1-1/2"x.095 WALL(STANDARD)
PIPE 1-1/4" SCH. 40 (EXTRA COST)
3
1
4
"
1
1
2
"
12"
1
1
2
"
3'-0"
7"
11"
1
4
" CLOSURE PLATES
KNEE RAIL
HANDRAIL
Dewalt Power Stud
FOR LANDING CONNECTION
1
4
" CLOSURE PLATES
PICKET
TOP RAIL
5/8" RB BRACKET
POST
1
3
4
"
TY
P.
TY
P.
NOTE: TOP GRAB RAIL IS EITHER CONTINUOUS
TO NEXT FLIGHT OR THERE IS A 12" HORIZONTAL
EXTENSION FROM NOSING
PIPE GUARDRAIL - PICKET INFILL
VARIOUS PICKETS CAN BE USED - TYPICAL DESIGN
1 1/4 Pipe SCH 40
3'-6"
LINE OF STRINGER
TYP.
V
A
R
IE
S
1
4
"
FR
OM
N
OS
IN
G T
YP
.
4'-0" MAX.
4
"
M
A
X
.
℄℄
4" MAX.
1 1/2 SQUARE TUBE - PICKET INFILL
VARIOUS PICKETS CAN BE USED - TYPICAL DESIGN
HSS 1 1/2X1 1/2X 1/8
3'-6"
LINE OF STRINGER
TYP.
1
4"
V
A
R
IE
S
FR
OM
N
OS
IN
G T
YP
.
4'-0" MAX.
4
"
M
A
X
.
4" MAX.
PIPE GUARDRAIL - MULTIPLE LINE
7 LINE GUARDRAIL SHOWN
E
Q
.
E
Q
.
3'-6
"
FR
OM
N
OS
IN
G T
YP
.
4
"
M
A
X
.
LINE OF STRINGER
HSS PIPE 1.66X.140
TYP.
V
A
R
IE
S
1
1
1
1
6
"
1
4
"
4'-0" MAX.
℄℄
1 1/2 SQUARE TUBE - WIRE MESH INFILL PANEL
2"x2"x3/16" (#6 Ga.) WIRE MESH - 1" U CHANNEL FRAME
3'-6"
LINE OF STRINGER
2"x2"x3/16" (#6)
WIRE MESH WITH
1" U CHANNEL FRAME
HSS 1-1/2"x1-1/2"x1/8"
TYP.
PANEL WELDED TO
RAIL FRAME ALONG
THIS EDGE
A
A
WELDED WIRE MESH WIRE 2"
CENTER .135 Ø CARBON STEEL
1
4
V
A
R
IE
S
FR
OM
N
OS
IN
G T
YP
.
SECTION A-A
4'-0" MAX.
4
"
M
A
X
.
℄℄
1-1/2" TYP.
1
1
2"
1
1
2
"
NOTE: NO WIRE MESH REQUIRED IN
POURED CONCRETE PAN IF CONCRETE
HAS A MINIMUM DESIGN STRENGTH
OF 4000 PSI.
IF WIRE MESH REQUIRED IT
IS TO BE FURNISHED AND
INSTALLED BY OTHERS.
11"
1"
1
1
2
" CONCRETE FILL BY OTHERS
FORMED STEEL SHEET
TREADS AND RISER
THICKNESS AS REQUIRED
1"
7" M
AX
.
S
T
R
I
N
G
E
R
C
A
N
V
A
R
Y
I
N
S
E
C
T
I
O
N
1
8
"
1
1
2
"
NOTE: NO PROVISIONS HAVE
BEEN MADE IN ANY LAPEYRE
STAIR TREADS FOR ANY
LOOSE FIELD POURED TYPE
NOSINGS (FURNISHED AND
INSTALLED BY OTHERS.)
IF SUCH PROVISIONS
ARE REQUIRED IT WILL BE
THE RESPONSIBILITY
OF OTHERS TO PROVIDE
LAPEYRE STAIR WITH
THE PROPER INFORMATION
IN AQEQUATE TIME TO
MAKE THESE PROVISIONS
CONCRETE PAN TREADS
FIELD FILLED CONCRETE TREADS
1"
11" 1"
1
1
2
"
FORMED CHECKER PLT
TREADS AND RISER
THICKNESS AS REQUIRED
NOTE: IF APPLICABLE SOME
TREADS OR RISER PLATES MAY
BE SHIPPED LOOSE TO ALLOW
FOR FIELD WELDING OF
STRINGER TO STEEL PLATFORM
OR EMBEDDED STEEL AT
FLOOR LEVEL LANDINGS. THEY
MUST BE FIELD WELDED
WITH
1
8
" WELDS SIMILAR TO
DETAIL WELDS BELOW.
7" M
AX
.
S
T
R
I
N
G
E
R
C
A
N
V
A
R
Y
I
N
S
E
C
T
I
O
N
1
8
" 1
1
2
"
1
1
2
"
1
8
"
DIAMOND PLATE TREADS
FORMED TREAD AND RISER
TYPICAL GRATING TYPES:
TYP. GRATING TREADS
- SMOOTH 19W4
- SERRATED 19W4
- SMOOTH 11W4
- SERRATED 11W4
VARIES
3/16" BEARING BAR
WIDTH TYP.
10 1/2"
1 5/8"
NO
SIN
G
12 1/8"
NOTE: DEPTH OF BEARING
BAR CAN BE 1" OR 1-1/2"
DEPENDING ON STRUCTURAL
REQUIREMENTS.
VARIES
10 7/8"
1 1/4"
NO
SIN
G
12 1/8"
11W4
19W4
NOTE: WHEN CLOSED RISERS ARE REQUIRED,
THE NOSING WILL BE EXTENDED DOWN AS SHOWN
