Fold-5 - FIRST ANGLE PRJECTION - Welded Grating & CHEQD Plate Details

Oct 23, 2026

Structural steel detailing sheet presenting first-angle projection drawings for welded grating, CHEQD plates, and associated floor/landing components. Includes dimensional notes in millimetres with explicit welding, bolt, gap, and clearance requirements; specifies grating hole patterns, bolt grades, stiffener schedules, and butt-weld penetration rules. Provides multiple callouts for sections and elevations (e.g., stringer and tread details), general erection and material standards, and load/design assumptions for moment and shear connections per referenced Indian codes and project specifications.

LanguageEnglish

CategoryResearch & Report

FormatPDF

Pages8

Reading Time20 min

AccessFree to download

FIRST ANGLE PRJECTION

GENERAL NOTES FOR STRUCTURAL STEEL AND MISCELLANEOUS STEEL WORK

GRATING ASSEMBLY AND WELDED TYPE DETAILS

CONNECTIONS, BOLTS, WELDS AND CLEARANCES

SECTIONS AND ELEVATIONS (STRINGER & TREAD DETAIL)

Fold-5 Fold-3 Fold-4 Fold-2 FIRST ANGLE PRJECTION Fold- ALL DIMENSIONS ARE IN MMTTO○-9T9-62E-DI-Hd15141110987654321'ON 9NIMVaa60/P CHEQD.PL.1200250WELDED TO ANGLE5·(U.N.0.)5-CL.OF COLTYPFOR OPENING SIZEFOR OPENING SIZE下250FLOORLVL.W.P.TREAD年导3SEE FLOOR PLANSEE FLOOR PLANTAPER NOT EXCEEDING 1 N 5CARRIER PLATES350175R=350 FoR SEC8-82 TO 3MM GAP5·(TYP)(TYP)>5VQM40 THK GRATING WITH丝L-65x65x613øHOLES for 12øBOLTDIAPHRGM PL.HSFG BOLTS(8.8 GRADE)(TYP)16 THK.-DETAIL FOR TAPER OF PLATET03 GAP12 SQ.BAR @75 C/C(TYP)60°DETAIL-A60°CHEQD.PL'STREADwW2 T03 GAPMC-250-(MIN)40×6 TH.FLAT-吕5Ⅱ50x6 TH.FLAT-45°下@40 C/C(TYP)W.P.大40X6 TH.FLAT-PLAN6▽PLANTYP>(TYP.7 PLCS)BACK GOUGE-2103 c3T03 GAP(ALL RDUND)100 MIN.FORMC-250(Min.)LANDING LVL.DOUBLE ROW OF BOLTS.15 CLRPIPE SLEEVE45'UPTO 8 TH.PL.ABOVE 8 TH.&UPTO 16 TH.PL.ABOVE 16 TH.PLX75 MIN.FOR(MIN)OR PL.6 THK.TYP.DETAIL OF BUTT WELD FOR SPLICE(SHOP/SITE)ELEVATION13øHOLES N STRINGER-SWISINGLE ROW OF BOLTS.SECTION 8-8 1312 PAG3o 5 BUILT UP COL. 3 o M dV9 BACK GOUGE- RISER(Mox.180) 00(min) 4$0 COL.WEB BUT WELDED TO FLANCE IN THIS ZONE(TYP) SPAN 50(mm) wWSHOWING STRINGER &TREAD DETAILSO(TYP.FOR GRATING &CHEQD.PLATE)GRATING ASSEMBLY0mm)WEB COVER PL.吕SECTION 7-7GENERAL NOTES FOR STRUCTURAL STEEL AND MISCELLANEOUS STEEL WORKSTOP FLUSHEDUDL(KG/SQM)MAX.SPAN(M)DETAIL-BSCHEDULE OF STIFFENER5002.00(M)6MP)A.GENERAL1000CLEAR SPAN (L)1.60TYP.DETAIL OF GRATING WELDED TYPE品5350a.)ALL DIMENSIONS ARE IN MILLIMETRES EXCEPT FLOOR ELEVATIONS AND1.)BUTT WELDS SHALL BE FULL PENETRATION BUTT WELD.STIFFENERPLANT GRID WHICH ARE IN METRE UNLESS STATED OTHERWISE.FLANGE COVER PL.CL.OF 1st ROW OF WEB BOLTS.DETAIL-SDETAIL-Tj.)THE DIAMETER OF BOLT HOLES SHALL NOT BE MORE THAN 2 MM.0 TO 450一hooCL.OF 2nd ROW OF WEB BOLTS.ELEVATIONELEVATIONb.)ALL ELEVATIONS ARE WTH RESPECT TO MAIN POWER HOUSE BUILDINGOF THE DIAMETER OF BOLT UNLESS STATED OTHERWISE.450 T01000FLAT 40x6TYP.DETAIL OF GRATING FOR FLOOR/PLATFORM.GROUND FLOOR LEVEL AS EL.(±)0.00 M.WHICH CORRESPONDS TO100 CL.OF 3rd ROW OF WEB BOLTSRL.*****ABOVE M.S.L.k.)THE ERECTION CLEARENCE FOR END OF MEMBERS SHALL NOT BE MORE1000 TO01500FLAT 50x8100(FOR ODD NOS.OF BOLTSCL.OF COL./BEAM/GIRDER4-50X6TH.FLAT X450 LONGSPACING IN 2nd ROW TO BEPENETRATIONS IN CHEQUERED PLATER=350c.)ALL DRAWINGS SHALL BE READ IN CONJUNCTION WITH THE TERMS,THAN 5 MM.AT EACH END UNLESS STATED OTHERWISE.1500 TO 2000L50X50X6STAGGERRED w.r.t.1st ROW.FLANGE COVERP PL.ⅡCONDITIONS AND SPECIFICATIONS OF THE CONTRACT.2445(Min.)早REF.COL.DRGS.FOR WEB BOLTS)(THICKNESS=1/2 THK.OF FL.PL.)L.)GUSSET/END PLATES SHALL BE OF FOLLOWING MINIMUM THICKNESSFOR OPENING SIZE(TYP.)电6 THK.TO MATCHCL.OF SPLICESEE FLOOR PLANFOR OPENING SIZEⅡd.)THE FABRICATION &ERECTION OF STRUCTURAL STEEL SHALL BEUNLESS SPECIFIED OTHERWISE:-IN ACCORDANCE WITH IS:800-CODE OF PRACTICE FOR GENERALCHANNEL FLGSEE FLOOR PLANi)FOR BEAMS OF DEPTH LESS THAN 450:-8 MM.CONSTRUCTION IN STEEL AND AS SPECIFIED IN THE CONTRACT品WDTH (TYP)ii)FOR BEAMS OF DEPTH 450 TO 600:-10 MM.5 GAPTYP.号505TYP.TYP.ARRGT.OF MOMENT CONN.OFFLANGE COVERP PLiii)TRUSS/BRACINGS,WITH MEMBER THICKNESS 8 MM.&LESS:-8MM.3CLEAR SPAN =|PLAN 3-3头2TOP OF FLOORMAIN BEAM/GIRDER TO COLUMN(BOLTED FIELD CONNECTION)WEB COVER PL.WEB COVER PL.YPB.MATERIALiv)TRUSS/BRACINGS,WITH MEMBER THICKNESS 10MM&MORE:-12MM.16 THK.SECTION 9-9a.)ALL MATERIALS SHALL BE NEW,CLEAN,RUST FREE AND STRAIGHTENED2420AS PER RESPECTIVE MEMBER CAPACITY FOR FRICTION &BEARING TYPE CONNECTON)F NECESSARY BEFORE BEING WORKED.m.)UNLESS OTHERWISE STATED IN THE DESIGN DRAWINGS,THE CONNECTIONSHALL BE DESIGNED FOR THE FOLLOWING LOADS:-SECTION 1-160/P CHEQD.PLL50X50X63W.P3(SPACING AND EDGE DISTANCES GIVEN FOR 22øHSFG BOLTS.)b.)ALL WELDING ELECTRODES SHALL BE OF LOW HYDROGEN TYPE55V(FOR TORQUE AND TIGHTENING METHOD REF.TECH.SPEC.)CONFORMING TO IS:814 AND SHALL BE EB5426H3JX TYPE.ALLi)MOMENT CONNECTIONS DESIGNATED AS 'MC′TO BE DESIGNED FORTHE FULL CAPACITY OF THE MEMBER.STIFF.REF.SCHEDULESECTION 2-2对2525(TYP)INDIA LTD.,D&

FAQs

What projection method is used for these structural drawings?

The drawings state “FIRST ANGLE PRJECTION” as the projection method.

What measurement units apply across the document?

The sheet notes that all dimensions are in millimetres, while floor elevations and the plant grid are in metres unless otherwise stated.

What are the key welding and bolt requirements mentioned?

The notes specify full penetration butt welds, and define bolt grades/class requirements for mild steel and high strength structural bolts, along with rules for welding electrodes and fillet weld sizes.

Oct 23, 2026

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