21.JUL.09

NOTES:

1.- DIMENSIONS IN MILLIMETERS (U.N.O.)2.- EACH STAIR LAYOUT SHALL USE THE SAME SLOPE, PREFERRED ANGLE 25^TO 38^

3.- FOR STAIRS WITH MORE THAN 18 TREADS AN INTERMEDIATE LANDING SHALL BE

USED (U.N.O.). THE PREFERABLE HEIGHT BETWEEN THESE LANDINGS IS 3000 mm; BUT SHALL NOT BE HIGHER THAN 3400 mm

4.- TREAD AND RISE DIMENSIONS SHALL COMPLY WITH THE FOLLOWING EQUATION 610 (A+2xS) 640. WHERE A= TREAD AND S= RISE.5.- THE RISES FOR EACH STAIR SHALL BE EQUAL. ONLY ON THE FIRST STEP (LOWER ONE) A + 6 mm DIFFERENCE IS ACCEPTABLE6.- THE PREFERRED STRINGER SEPARATION IS 800 mm (U.N.O.)7.- FOR BOLTED STAIRS LONGER THAN 4300 mm (INCLUDING LANDINGS), BRACING UNDER STRINGERS SHALL BE INCLUDED IN ACCORDANCE WITH DETAIL 11

8.- FOR STAIRS LOCATED BETWEEN RIGID SUPPORTS, PROVIDE SLOTTED HOLES IN

ONE END TO PREVENT SEISMIC AXIAL LOADS

9.- FOR ADDITIONAL STAIR DETAILS REFER TO EACH DESIGN DRAWINGS

10.- FOR WELDED CONNECTIONS REFER TO TECHNICAL SPECIFICATION

N^560-000-GC-S-004 "STRUCTURAL AND MISCELLANEOUS STEEL

FABRICATION AND ERECTION"

11.- RL FIN FL = REFERENCE LEVEL FINISH FLOOR

(TOP OF GRATING) (TOP FLOOR PLATE) (TOP OF CONCRETE)

000 - GENERAL

1

NOT SCALE

000-ST-S-001

MODIFY INDICATE

ISSUED FOR CONSTRUCTION

ISSUED FOR CLIENT APPROVAL

ISSUED FOR INTERNAL COORDINATION

1

0

B

A

APR FAVRMA

RMA

GSL

SCH

SCH RMA APR FAV

APR FAV

RMA RMA RSR

15-MAR-10

21.AUG.0

21.JUL.09

29.DEC.08

29.DEC.08

29.DEC.08

21.JUL.09

RSR

RMA/FAF

APR

FAV

560-000STS001.DGN

STANDARD STEEL STAIRS DETAILS

0

00-S

T-S

-001

GENERAL

1

1

DWG. NO.

REVISION

CAD NO.

DWG. NO.

TITLE

AREA

PROJECTSHEET SIZE

DATE:

DATE:

DATE:

DRAWN BY:

SCALE:

D E S C R I P T I O N

R E V I S I O N SR E V I S I O N SNO.

R E F E R E N C E ST I T L E NO.

DR

AW

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NO

.

DATEBY APPROVEDD E S C R I P T I O N

QUALITY CONTROL

DOCUMENT CONTROL

SIGN & STAMP

APPROVED BY:

AUTHORIZED BY:

MCP APPROVED:

CHECKED BY: DATE:

DATE:

A1C-560

MINERA CHINALCO PERU S.A.

CHECK DATEBY APPROVEDCHECK NOTICE

DRAWING NOT VALID WITHOUT SIGN AND STAMP OF DOCUMENT CONTROL

SIGNDISCIPLINE MANAGER NAME

NAMETHIS DRAWING NOT VALID UNLESS THE LATEST REVISION INITIALS ARE HANDWRITTEN

THIS IS A COMPUTER GENERATED DRAWING. ALL CHANGES

HERE TO SHALL BE PERFORMED USING CADD ONLY.

THIS DRAWING IS THE PROPERTY OF AND EMBODIES

PROPRIETARY INFORMATION BELONGING TO AKER

SOLUTIONS AND MUST BE RETURNED IMMEDIATELY UPON

REQUEST. IT MUST NOT BE COPIED IN WHOLE OR IN PART, NOR THE INFORMATION SHOWN THERE ON DISCLOSED

TO THIRD PARTIES EXCEPT WITH THE WRITTEN

PERMISSION.

A B C D E F G H

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User:

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CSC3299

TOROMOCHO PROJECT

OPTIM

UM AN

GLE

CRIT

ICAL

ANG

LE

CRITICAL

ANGLE

L250

C250

C250

90^

0^

70^

50^38^

25^

PREFERREDANGLE

HANDRAILS HEIGHT X

25^ @ 38^ 39^ @ 50^

2200 2300 @ 2500

900

RECOMMENDED WIDTH 800800

129

190

382

250

178

232

274

180

S

A

C25

0

C25

0

C250

C250

C25

0

C25

0

C250

C25

0C25

0

AXIS

ACC

ESS

ACCESS

AXIS

0^ 0^ 0^ 0^

30^

35^

C250

C250

C250

C or W

C250

WP

C250

C250

C250

C250 C2

50

WP > BEAM

GRATING

25C2

50

C250

P 6L

6 PL

250 SEE NOTE 4

L50

C250

L80

L80

L=7" PROJ.= 90mm

SLOTTED

23

40mm

1000

--

25(TYP.)

25

(TYP

.)

25(TYP.)

25

(TYP.)250 (TYP.) (UNO)

100

300

100

800800

1200

10001200

1000

800

760 (U.N.O.)

25

5

(TYP.)

GRATING

Y

X

25

25

80

25

75

2525

9090

25

50

TYP.25

25

25

25

50

25

50

600

(MAX.)

TOS

25

10

25

25

25

30

25

45(MIN.)

8 PL

8 PL

8 PL

DET. 1

000-ST-C-007

DET. 13

TYP.

TYP.

TYP.

TYP.

WP

WP

WP

3400

(MA

X.)

3000

(REC

OMM

ENDE

D)

RL FIN FL

RL FIN FL

WP

GROU

T

WP

WP

WP

RL FIN FL

RL FIN FL

RL FIN FL

RL FIN FL

RL FIN FL

FOR TREAD

UP

UP

BRACE

BRACE

SEEDESIGN

TYPICAL STAIR LAYOUT

STAIR BRACING

DETAIL 11

GRATINGOR FLOOR PLATE

TOS

WP

STAIR

DETAIL 1

PLAN STAIR LANDING ACCESS

DESIGNTREAD

DESIGNTREAD

STAIR

DETAIL 2

GRATING ORFLOOR PLATE

WP

GRATING ORFLOOR PLATE

TREAD

STAIR

TOS

WP

DETAIL 3

GRATING ORFLOOR PLATE

DESIGNTREAD

STAIR WP

1+1 BOLT 3/4"

SLOTTED HOLES

13/16"x30mm

DETAIL 4

TOC

TREAD

WP

2-CHEMICAL ANCHOR BOLT 5/8"L=150mm PROJ.=55mm

DETAIL 5

GRATING ORFLOOR PLATE

WP

STAIR

TREAD TREAD

DETAIL 6

TREAD

STAIR

WP

EXPANSION BOLT 3/4"

DETAIL 7 DETAIL 8

6 PL

WP12 PL

DETAIL 9DETAIL 10

RL FIN FL

> BEAM

TREAD

STAIR

11/16" FOR BOLT 5/8"

SEE

DESIGN

SEE

DES

IGN

30x30x3 FLOOR PLATE

HOLE

HANDRAIL

VERTICAL CLEARANCE

S

RIS

E

A

TREAD

DETAIL 12

DETAIL STAIR DETAIL 13

EMBEDMENT

WP

MINIMUM

MINIMUM

MAXIMUM

MAXIMUM

STAIRS

MA

X. A

NG

LE

STAIRS

LADDER

RAMP

MACHINELADDERS

TABLE SLOPE IN STAIRS

MIN. VERTICAL CLEARENCE Y

STRINGER C250x80x9 (TYP)

STRINGER C250x80x9 (TYP)

C250x80x9L63x6

L50x5 (TYP.)

L80x6

L80x6(T

YP)

HSS 50x50x6

L50x5

NOTE: THE BRACING CONNECTION FOR SITEASSEMBLED STAIRS WILL BE BOLTED

ANGLEL90x6

RIS

ER

ISE

DESIGNTREAD

DESIGNTREAD

DESIGNTREAD

RIS

ER

ISE

RIS

ER

ISE

RIS

ER

ISE

RIS

E

RIS

E

RIS

E

180

@ 1

95

(RIS

E)

RIS

E

RIS

E

RIS

E

RIS

E

RIS

E

RIS

ER

ISE

RIS

E

L50x6

L90x6

L100x8L50x6

ANGLEL90x8

L100x8

25

L90x6

L90x6

L90x6

L63x6

SLOTTED HOLE ON L50x6

11/16"x 25mm FOR BOLT 5/8"

L50x6 ORL63x6

50 (MIN.) OR1/2 W SHAPE

1

3/1

6 "

NOTE:- PREFERRED TREAD 250 mm- PREFERRED RISE 187 mm

L 90x6 WITH SLOTTED

HOLE 13/16"x 40 mm

EXPANSION BOLT 3/4" L=7" PROJ.=90 mm

DESIGNTREAD

(TYP.)

50 (MIN.) OR1/2 W SHAPE

W or C

WORKING POINT

900