A1.2.Appendix_B.pdf

A-A

B-B

4"

3 7/8 " 3 7/8 "

2" 2"

1" 1"

2'-0"

BEARING

CENTERLINE

4"

6"6"8" +/-6"6"

TYP

2'-10"

3 7/8 "2" 3 7/8 " 2"

6"6"8" +/-6"6"

210 6

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S-301

SECTION A-A

SCALE: 1"=1'-0"

SECTION B-B

SCALE: 1-1/2"=1'-0"

ELEVATION

SCALE: 1"=1'-0"

NOTES:KEY NOTES:

THE TOP PLATE WILL HAVE TO BE PLACED THROUGH THE EXISTING DOUBLE ANGLES 4X4X5/8 DIAGONAL.3.

THE CENTER PLATE WILL GO IN NEXT (WITH ALIGNMENT PLATES, AS PER DETAILS & KEYNOTES). 2.

THE BOTTOM PLATE 1ST (HOLD IN PLACE BY THE EXISTING DOUBLE ANGLES 6X4X1/2, DO NOT WELD YET). 1.

STRUCTURAL STEEL FRAMING NOTES:

NOT FOR CONSTRUCTION

PRELIMARY DRAWING

SEQUENCE OF WELDING:

SEQUENCE OF THE NEW PLATES ½” PLACEMENT:

4X3X3/8. REFER TO AS-BUILT SHEET 21

EXISTING BOTTOM CHORD BRACING ANGLE

REFER TO AS-BUILT SHEET 21

EXISTING END BAY BRACINGST4WF8.5.

REFER TO AS-BUILT SHEET 21

EXISTING TRUSS DOUBLE ANGLES 4X4X5/8.

WEB (AS SHOWN)

AND TO EXISTING BOTTOM CHORD

ANGLES 6X4X1/2 AND TO NEW PLATE ½”

BETWEEN EXISTING & NEW DOUBLE

NEW FILLET WELD 3/8” (MINIMUM),

(BOTH SIDES, FRONT & BACK).

NEW ALIGNMENT/SPLICE PLATE ½”X4”X0-5”

TOP CHORD WEB)

TO FIT/INSTALL AS CLOSE AS POSSIBLE TO

NEW PLATE ½”X1’-4”X2’-10” (FIELD VERIFY

SPACER BAR

CHAMFER TO FIT AROUND EXISTING

NEW PLATE ½”X1’-4”X2’-10” (FIELD VERIFY)

WEB TO SPACER BAR).

VERIFY SPACE FROM BOTTOM CHORD

NEW PLATE ½”X2’-10”X2’-10” (FIELD

NEW DOUBLE ANGLES 6X4X1/2 (LLBB)

TO AS-BUILT SHEET 23

EXISTING FLOOR BEAM 12I31.8. REFER

AS-BUILT SHEET 21

TO DOUBLE ANGLES). REFER TO

EXISTING SPACER BAR ½”X3X5 (WELDED

REFER TO AS-BUILT SHEET 21

ST15WF54 (WEB THICKNESS = 0.545).

EXISTING TRUSS BOTTOM CHORD

SHEET 21

6X4X1/2 (LLBB). REFER TO AS-BUILT

EXISTING TRUSS DOUBLE ANGLES

BUILT SHEET 21

(WEB THICKNESS = 0.585). REFER TO AS

EXISTING TRUSS TOP CHORD ST15WF62

ACCORDANCE WITH AWS D1.1.

AS PRE QUALIFIED PROVIDED THE CONTRACTOR USES PRE-QUALIFIED JOINT DETAILS AND PARAMETERS IN

USACE WILL CONSIDER THE WELDING OF THE FED SPEC STEEL TO NEW A36 MATERIAL WITH 7018 ELECTRODES8.

TO FS-QQ-S-741A, TYPE II.

ACCORDING TO THE AS-BUILT DRAWINGS, EXISTING TRUSS MATERIAL IS STRUCTURAL STEEL CONFORMING 7.

AWS D1.1.

ALL WELDS SHALL BE 100% VISUALLY INSPECTED BY CERTIFIED WELDING INSPECTOR IN ACCORDANCE WITH 6.

MANUFACTURER.

D1.1. THE WPS SHALL INCLUDE THE WELDING PARAMETERS RECOMMENDED BY THE ELECTRODE

AWS D1.1 FOR REVIEW BY THE CONTRACTING OFFICER. ALL WELDS SHALL BE PRE-QUALIFIED PER AWS

THE CONTRACTOR SHALL SUBMIT A WELDING PROCEDURE SPECIFICATION (WPS), IN CONFORMANCE WITH 5.

WELD LENGTHS: WHERE LENGTH IS NOT SPECIFIED, THE WELD SHALL BE THE FULL LENGTH OF THE JOINT.4.

(UNLESS OTHERWISE NOTED).

SHALL BE RETURNED CONTINUOUSLY AROUND CORNERS A DISTANCE OF 2 TIMES THE WELD SIZE PER AISC

ACCUMULATION OF MOISTURE, OTHERWISE, WELDS TERMINATING AT ENDS OR SIDES, WHEREVER APPLICABLE, WELD TERMINATIONS: PROVIDE ALL AROUND WELDS AT ALL CONNECTIONS WHEREVER POSSIBLE, TO PREVENT 3.

FILLET WELD SIZES SPECIFIED ARE MINIMUMS. PROVIDE WELDS ALL AROUND ALL CONTIONS WHEREVER

WELDING: ALL WELDING SHALL BE PERFORMED BY CERTIFIED WELDERS IN ACCORDANCE WITH AWS D1.1 2.

WELDING ELECTRODES ....................... E70XX, SMAW PROCESS WITH LOW HYDROGEN ELECTRODES

ANGLES & PLATES................................. ASTM A 36 (Fy = 36 ksi, 50 ksi MAY BE USED WITH GOVERNMENT APPROVAL.)

MATERIALS:1.

WELD NEW DOUBLE ANGLES 6X4X1/2” TO TOP & BOTTOM CHORDS AS SHOWN ON DRAWINGS.5.

WELD EXISTING DOUBLE ANGLES 6X4X1/2 TO NEW PLATE ½” AS SHOWN ON DRAWINGS.4.

TACK WELD NEW AND EXISTING DOUBLE ANGLES 6X4X1/2 (LLBB) AT 24” ON CENTER. 3.

WELD NEW DOUBLE ANGLES 6X4X1/2 TO NEW PLATE ½” WITH FILLET WELDS, AS NOTED ON THE DRAWINGS.2.

(MINIMUM OF 2 WELDS PER PLATE).

TACK WELD EXISTING DOUBLE ANGLES 6X4X1/2 (LLBB) TO NEW PLATE ½” (FRONT AND BACK) AT 24” ON CENTER1.

NO ADDITIONAL COST TO THE GOVERNMENT.

CONTRACTOR SHALL INFORM THE EOR, ASAP, OF ANY NECESSARY REVISIONS TO THE PROPOSED FIX, AT

ACCESSIBILITY/EXISTING CONDITIONS RESTRAINTS. AFTER THE CONTRACTOR’S SITE INVESTIGATION THE

INSTALLED IN ONE PIECE (PREFERRED OPTION), SO IT IS SHOWN IN 3 PARTS BASED ON

DUE TO EXISTING SPACER BAR @ EXISTING DOUBLE ANGLES 6X4 & 4X4, THE NEW PL ½” CANNOT BE NOTE:

OBTAIN THE CONTRACTING OFFICER APPROVAL FOR A LARGER LIVE LOAD.

WORK LOAD AREA, WHERE A LARGER LIVE LOAD WILL BE PERMITTED. HOWEVER, THE CONTRACTOR SHALL

THE CONTRACTOR SHALL USE THE ADJACENT TRUSS SPAN ON THE OTHER SIDE OF THE EXPANSION JOINT FOR

THE CONTRACTOR SHALL LIMIT CONSTRUCTION LIVE LOAD TO 2000lbs ON THE DECK AT THE DAMAGED TRUSS. 8.

GREASE. USE OF POWER TOOL CLEANING (SSPC SP 3) IS RECOMMENDED.

ENSURE THAT ALL STEEL SURFACES TO RECEIVE WELDING OR PAINT ARE FREE FROM RUST, DIRT, OIL, AND 7.

APPROVAL BY THE CONTRACTING OFFICER.

ANY DEVIATION FROM THE APPROVED SET OF STRUCTURAL DRAWINGS SHALL ONLY BE MADE AFTER WRITTEN6.

EM 385-1-1.

RESPONSIBILITY TO COMPLY WITH ALL APPLICABLE LOCAL SAFETY REQUIREMENTS AND REQUIREMENTS OF

STATE AND FEDERAL SAFETY AND HEALTH STANDARDS, LAWS AND REGULATIONS. IT IS THE CONTRACTORS

DEVICES, INLUDING SHORING AND BRACING, AND BE SOLELY RESPONSIBLE FOR CONFORMING TO ALL LOCAL, STRUCTURE DURING CONSTRUCTION. THE CONTRACTOR SHALL DESIGN, CONSTRUCT AND MAINTAIN ALL SAFETY

THE CONTRACTOR SHALL TAKE THE NECESSARY PRECAUTIONS TO MAINTAIN AND INSURE THE INTEGRITY OF THE

THE FINISHED STRUCTURE AND DO NOT INDICATE METHODS, PROCEDURES OR SEQUENCE OF CONSTRUCTION.

CONSTRUCTION METHODS AND PROJECT SAFETY: THE CONTRACT DRAWINGS AND SPECIFICATIONS REPRESENT 5.

ALONG THE VERTICAL.

THIS TRUSS UNTIL THE PERMANENT FIX IS DONE AND THE NEW 1/2" PLATES ARE CUT, TO PROVIDE FOR A 2" GAP

FUNCTION AS INTENDED, NO ROTATION CAN TAKE PLACE, SO RESTRICTION ON LIVE LOAD MUST BE PLACED ON

DEAD LOAD ONLY. ONCE THIS PROPOSED TEMPORARY FIX IS APPLIED, THE PIN CONNECTION WILL NO LONGER

THIS PROPOSED FIX IS BASED ON THE TRUSS CURRENT "AT REST CONDITION" PIN ROTATION UNDER APPLIED 4.

FOR ANY SIGNS OF MOVEMENT THAT IS A SIGN OF PROGRESSIVE STRESS/DETERIORATING CONDITION.

THE CONTRACTOR SHALL INSTALL SUFFICIENT DEVICES AT CRITICAL LOCATIONS AND CONTINUOUSLY MONITOR 3.

OF LINE, THE CONTRACTOR SHALL IMMEDIATELY NOTIFY THE EOR.

ALIGNMENT TO ALLOW PLACEMENT OF PLATES. IF THE TRUSS THAT IS SHOWING BEARING FAILURE MOVED OUT

IT IS ESSENTIAL TO FIELD VERIFY THAT THE 2 INLINE TRUSSES TO RECEIVE THE NEW PLATE ½” ARE IN PERFECT 2.

CONDITIONS AND POTENTIAL CONSTRUCTABILITY ISSUES, PRIOR TO FABRICATION.

IMMEDIATELY OF ANY DISCREPANCIES AND/OR POTENTIAL CONFLICT BETWEEN PROPOSED FIX AND EXISTING

THE INITIAL SITE VISIT. THE CONTRACTOR SHALL INFORM THE CONTRACTING OFFICER, IN WRITING, REFER TO AS-BUILT DWGS FOR MORE DETAILED INFO AND FIELD VERIFY ALL DIMENSIONS AND SIZES, DURING 1.