OSHA REQUIREMENTS AND RULES

 

 OSHA REQUIREMENTS

BASE PLATE :

• BASEPLATE NEED TO HAVE MINIMUM 4 ANCHOR BOLTSA

• USAGE OF LEVELING NUT OR LEVELING PLATE SHOULD BE DISCUSSED WITH ERECTOR

• DETAILER SHOULD REFER TO DESIGN DRAWINGS TO PROVIDE OVERSIZED HOLES IN BASE PLATE ,IF INFORMATION MISSING THEN WE NEED TO REFER TABLE C-J9.1 AND 14.2 OF AISC BOOK.

COLUMN

• COLUMN SPLICE SHOULD BE AT 4'-0 FROM FINISHED FLOOR 

 

•  ALL PERIMETER COLUMNS SHOULD HAVE SAFETY HOLES FOR WIRE GUARD RAIL ONE AT 1'-9 FROM FINISHED FLOOR AND SECOND AT 3'-6 FROM FINISHED FLOOR

 

•  ALL COLUMNS SHOULD BE PROVIDED WITH LIFTING HOLE SPECIALLY TIER COLUMNS,NORMALLY LIFTING HOLE DIA IS 2'-0.

 

•     ALL COLUMNS SHOULD HAVE CORRECT ORIENTATION MARK TO ERECT THE COLUMN.

• EXTENDED SHEAR TAB CONNECTION TO BE FOLLOWED WHERE BOLT ACCESS IS BLOCKED BY FLANGES.       

BEAM:

• MINIMUM OF TWO BOLTS REQUIRED AT EACH END OF BEAM FOR ERECTIO

• D/2 RULE TO BE SATISFIED AT EACH CONNECTION TO SATISFY REQUIRED LOADS

• ALL DOUBLE ANGLE CONNECTIONS AT COLUMN WEB OR BEAM WEBMUST HAVE STAGGERED CLIP ANGLES OR A BEAM SEAT  OR A TOP FLANGE CLIP ANGLE .WHEN NOT POSSIBLE TO PROVIDE SAFETY CONNECTIONS THE DETAILER SHOULD ADD A NOTE OF WARNING  TO THE ERECTOR ON EPLANS.

JOISTS:

• IF JOIST SPAN  MORE THAN 40'-0  THEN WE SHOULD BE PROVIDED WITH 2 ERECTION BOLTS

• VERTICAL STABILZER PLATE NEED TO BE PROVIDED, THIS PLATE SHOULD BE OF MINIMUM 6"X6"  AND 3" BELOW THE BOTTOM OF JOIST, WITH 13/16DIA HOLE FOR GUYING OR PLUMBING CABLES.

DECK :

• DECK SUPPORT MAY BE REQUIRED AT DECK CUTOUTS NEAR BEAM TO BEAM OR BEAM TO COLUMN CONNECTIONS,REFER DESIGN DRAWING OR THE CLENT FOR PREFERRED METHOD

SNAGGING HAZARDS:

• AVOID SHARP CORNERS.

 

CONNECTIONS:

• USE BEARING CONNECTIONS AND AVOID HANGING CONNECTIONS.

TRIPPING HAZARDS:

• ANY CONNECTIONS OR OBSTRUCTIONS SHOULD BE AVOIDED ON TOP OF BEAM OR JOIST.

FALL PROTECTION:

• MULTISTORAGE STRUCTURE REQUIRES GUARD RAIL CABLES AT FLOOR PERIMETER ,INTERIOR OPENINGS  AND ROOF OPENINGS.THIS PROTECTION SUPPORT SHOULD BE AGREED UPON PRIOR TO COMENCEMENT OF DETAILING.

ERECTION AID:

• FOR FIELD WELDS OF TUBES OR BRACINGS ,WE NEED TO PROVIDE ERECTION BOLT OR ERECTION ANGLE FOR SUPPORT

WHAT IS TEKLA & STEEL DETAILING?

TEKLA means building inormation modelling software used in building and construction industries for steel,concrete and precast detailng.

Types of versions in tekla.

17.0,

17.1,

18.0,

18.1,

19.0,

19.1,

20.0,

20.1,

21.0,

21.1.

TEKLA 2017,TEKLA 2018,TEKLA 2019,TEKLA 2020.

WHAT ARE THE ENVIORNMENTS IN TEKLA?

US IMPERIAL,US METRIC,UK,INDIAN.

FOR US WE WILL USE US IMPERIAL.

WHAT ARE THR ROLES IN TEKLA?

 STEEL DETAILING

 CASTING,

ENGINEERING

WHO WILL DO PROJECT IN TEKLA ?

DETAILER,

MODELER

CHECKER

STEEL DETAILNG?

THE PROCESS OF CONVERTING DESIGN DRAWING IN TO  SHOP & FIELD DRAWINGS IS KNOWN AS STEEL DETAILING.

 HOW PROCESS WILL START?

What are the responsblies of detailer?

1.HE NEED TO EDIT SHOP DRAWINGS & ERECTION DRAWINGS WITH RESPECTIVE TO DESIGN DRAWINGS IN AN UNDERSTANDING MANNER.

what are the responsiblies of modeler?

HE NEED TO CONSTRUCT THE BUILDING IN 3D VIEW WITH RESPECTIVE 

TO DESIGN DRAWINGS IN AN UNDERSTANDING MANNER.

What are the responsibilities of checker?

He need to check and correct the errors of detailer and modeler with respective to design drawings.

He need to coordinate with detailer and modeler to achieve desired output.

*************************************************************************PLEASE MENTION YOURS COMMENTS AND SUPPORT ME FOR FURTHER

UPDATES.

MOMENT SPLICE CONNECTIONS (STEEL DETAILING & TEKLA)

 1.DRAW FLANGE PLATED SPLICE MOMENT CONNECTIONS?

                                  FLANGE PLATED SPLICE MOMENT CONNECTIONS.

 

DIRECTLY WELDED MOMENT SPLICE CONNECTION

TEKLA & STEEL DETAILING INTERVIEW SIX QUESTIONS

 1.WHICH TYPE OF CONNECTION TO BE PREFERABLE IN FIELD TO REDUCE COST?

   BOLTED CONNECTION IS PREFERABLE WHEN COMPARED TO FIELD WELDING.

*.FIELD WELD IS SO COSTLY THAN FIELD BOLTING.

2.PLEASE DRAW COLUMN WITH BASE PLATE CONNECTION?

JUST FOR REFERENCE

COLUMN WITH BASE PLATE

1.       Bottom of base plate elevation.

2.       Orientation mark of the column.

3.       Column to base plate weld.

4.       Locations of the holes in base plate with respect to the column center line.

5.       Hole diameter and number of holes in base plate.

6.       Base plate thickness.

3.WHAT IS THE HOLE SIZE IN BASEPLATE FOR 3/4 DIA TO 2 1/2 DIA ANCHOR RODS?

Size of Anchor – Rod Holes In Base Plates
Anchor Rod Dia	Max. Hole Dia  As per LRFD	Hole Dia  As per ASD
3/4	1 5/16	1  1/16
7/8	1 9/16	1  3/16
1	1 13/16	1  1/2
1 1/4	2 1/16	1 3/4
1 1/2	2  5/16	2
1 3/4	2 3/4	2 1/4
2	3 1/4	3
2 1/2	3 3/4	3 1/2
Larger holes are permitted if Plate Washers Used.

4.WHAT IS THE USE OF LEVELLING PLATE?

Normally thickness of leveling plate will be ¼ -in. The  leveling plate may be larger than the base plate to accommodate tolerance of Anchor Rod placement.

5.WHAT IS THE USE OF PLATE WASHER?

 The oversize holes should be covered with a heavy plate washer. The minimum thickness should  be one-third the diameter of the anchor rod

  6.WHAT IS THE GRABRAIL EXTENSION FROM LAST TREAD ?

1'-0

 

 

CONNECTIONS SKETCHES-STEEL DETAILING -USEFUL POST.

 1.PLEASE DRAW DOUBLE ANGLE CONNECTIONS ?

CLIP ANGLE CONNECTIONS

2.PLEASE DRAW SHEAR PLATE CONNECTION?

END PLATE CONNECTION

SHEAR PLATE CONNECTION.

                           EXTENDED SHEAR TAB CONNECTION                                                                                                 

                                                                                                                                                   3.PLEASE DRAW T JOINT CONNECTIONS ?

T-JOINT CONNECTION

4.DRAW SINGLE ANGLE CONNECTIONS?

5.DRAW COLUMN FLANGE MOMENT BOLTED CONNECTION?

6.DRAW COLUMN WEB MOMENT  BOLTED CONNECTION?

7.DRAW COLUMN FLANGE MOMENT WELDED CONNECTION?

8.DRAW COLUMN WEB MOMENT WELDED CONNECTION?

 

                                                                                                                                                  

TEKLA & STEEL DETAILING INTERVIEW QUESTION PAPER-5 .

 1.WHAT IS THE GRADE FOR WASHER ,NUT ,STUD AND DTI WASHER?

WASHER-F436

NUT-A563

DTI WASHER-F959

STUD-A108

2.WHEN TAPPERED WASHERS WIIL USE?

TAPPERED WASHERS ARE USED WHEN THE SURFACE BEING BOLTED H AS A

SLOPED SURFACE,SUCH AS FLANGE OF C SHAPE AND S-SHAPE.

3.DEFINE BOLT LENGTH?

BOLT LENGTH IS THE DISTANCE FROM BEHIND THE BOLT HEAD TO END OF THE BOLT.

4.WHAT IS A SNUG TIGHT INSTALLATION?

SNUG TIGHT IS THE BOLT TIGHTENING PROCESS AND TIGHTNESS IS ATTAINED WITH FEW HITS OF IMPACT WRENCH OR FULL EFFORT OF AN IRON WORKER BY USING ORDINARY SPUD WRENCH  TO BRING THE CONNECTED STEEL IN TO FIRM CONTACT.

5.WHAT IS THE LONG SLOTTED HOLE FOR 1" BOLT?

1 1/16" X2  1/2"

6.WHAT ARE THE MAIN POINTS TO BE CONSIDERED WHILE CHECKING DRAWINGS?

100% DIMENSIONS ACCURACY.

CUSTOMER SPECIFIC STANDARDS.

DESIGN DRAWING POINTS.

FABRICABILITY

ERECTABILITY

7.WHO IS FABRICATOR AND ERECTOR?

FABRICATOR:IS RESPONSIBLE FOR FABRICATING THE STRUCTURES IN THE SHOPS BASED ON DETAILS GIVEN BY THE DETAILER.

ERECTOR: IS RESPONSIBLE FOR ERECTING THE STRUCTURE IN FIELD BASED ON THE DETAILS GIVEN BY DETAILER.

8.INCH TO MM CONVERSIONS?

1 INCH = 25.4MM = 0.0254M

1 M = 40 INCHS

1 FOOT = 300 MM = 12 INCHS

1KIP = 454 KILOGRAMS

1000 POUNDS = 1 KIP

1 POUND =  0.454 KILOGRAM

9.WHAT IS STICH WELD?

A SERIES OF WELDS OF A SPECIFIED LENGTH THAT ARE SPACED A SPECIFIED DISTANCE FROM EACH OTHER

10.WHAT IS A CLEAR SPAN?

LENGTH OF SPAN FROM FACE TO FACE OF SUPPORTS IS KNOWN AS CLEAR SPAN.

11.WHAT IS THE LIFTING HOLE DIA FOR COLUMN OR ANY STEEL?

2"Ø MIN

TEKLA INTERVIEW / STEEL DETAILNG QUESTIONS PAPER-4

 1.WHAT ARE THE WELDING POSITIONS?

1.FLAT.

2.HORIZONTAL.

3.VERTICAL.

4.OVERHEAD.

2.WHAT IS A TACK WELD?

A TEMPORARY WELD USED TO HOLD PARTS IN PLACE WHILE MORE EXTENSIVE, FINALWELDS ARE MADE.

3.WHAT ARE THE JOINTS OF WELD?

1.BUTT

2.LAP

3.CORNER

4.EDGE

5.T-JOINT

4.WHAT IS SURFACE PREPARATION AND SSPC?

SSPC-STRUCTURAL STEEL PAINTING COUNCIL.

SP1  - SOLVENT  CLEANING.

SP2  - HAND TOOL CLEANING

SP3  - POWER TOOL CLEANING.

SP5-  WHITE METAL BLAST 

SP6  - COMMERICAL BLAST 

SP7-  BRUSH OFF BLAST.

SP10- NEAR WHITE BLAST

SP12- HIGH AND ULTRA HIGH PRESSURE WATER JETTING.

5.Which are characteristics of Special Moment Frames?

a. the expectation of withstanding significant inelastic deformations under the

design earthquake

b. frames where the beam-to-column connections must be capable of sustaining

an inter-story drift angle of at least 0.04 radians

c. frames where qualification testing or pre qualification of beam to-column

connections is required

6.Paint thickness is commonly measured in which units?

MILS.

7.What is the purpose of a weld access hole is to?

a) allow the welder access to start and stop the beyond the plane of the beam

web.

b) minimize restraint to allow for shrinkage in the welded joint.

c) eliminate intersection of welds in orthogonal directions.

8.What is the difference between shop fabrication drawings and erection drawings?

Shop drawings are detail drawings of columns, beams and etc. Where as erection drawings are which shows all the locations of all structural steel framing members.    

9.If joist length more than 40 feet what type connection we have to use.?

 IF JOIST IS MORE THAN 40'-0 WE NEED TO FOLLOW BOLTED CONNECTION.

IF JOIST IS LESS THAN 40'-0 WE NEED TO FOLLOW WELDED CONNECTION.

10.How do view the beams in erection plan in case of beam detailing?

from left to right  and bottom to top.

11. What will be provided to strengthen the beam when the beam frames over the column?

we need to provide stiffeners in beam for load transfer.

12.what is the Formula for cut length?

C/C distance– set back dimensions – ½ on either side.

13. if Knife edge connection being provided by welding the 2 clips to the column and I am not able to erect from the sides. what we need to do?

 cut the bottom flange and insert the beam from top.

14.what are the anchor rod hole dia for 3/4Ø,1"Ø,7/8Ø?

3/4Ø-1"1/16Ø

7/8Ø-1"3/16Ø

1"Ø-1"1/2Ø

15.IF WE HAVE LONG SLOTS IN BEAM OR  ANY STEEL MEMBERS?WHAT WE NEED TO

 TO COVER SLOTS?

WE NEED TO PROVIDE PLATE WASHERS TO COVER THE LONG SLOTS.

16.WHAT IS A BUILT UP MEMBER?

A MEMBER MADE UP OF STRUCTURAL STEEL ELEMENTS THAT ARE WELDED OR BOLTED TOGETHER IS KNOWN BUILT UP MEMBER.

*BY USING PLATES WE CAN MADE A W MEMBER THAT IS KNOWN AS BUILT UP MEMBER.

17.WHAT IS A EDGE DISTANCE?

THE PERPENDICULAR DISTANCE FROM CENTRE OF HOLE TO EDGE OF THE MEMBER

IS KNOWN AS EDGE DISTANCE.

18.WHAT ARE THE OSHA REQUIREMENTS FOR BRACING?

1.ERECTION BOLTS ARE REQUIRED AT VERTICAL TUBE OR ANGLE BRACINGS.

2.OVERSIZED HOLES IN GUSSET PLATE FOR ERECTION FEASBILTY ,WE NEED TO

TAKE CONFIRMATION FROM CLIENT.

19.WHAT IS THE MAXIMUM ROW OF BOLTS FOR W6 TO  W36?

W6-1,

W8,10-2

W12,W14-3

W16-4

W18-5

W21-6

W24-7

W27-8

W30-9

W33,36-10

20.WHAT IS THE FIRST HOLE DISTANCE FOR W8 AND W27?

W8-2  1/2"

W27-3  1/2"

21.WHAT IS THE GAGE FOR L2 AND L4?

L2-1  1/8"

L4-2 1/2"

BELOW CONVERSIONS ARE IMP.

1/16-0.0625                5/16-0.3125

1/8-0.125                    3/8-0.375

3/16-0.1875                7/16-0.4375

1/4-0.25                       1/2-0.5

9/16-0.5625              13/16-0.8125

10/16- 0.625              14/16-0.875

11/16-0.6875             15/16-0.937

3/4- 0.75                     16/16-1

THANKS AND PLEASE FOLLOW ME

URS

DETAILER.