TEKLA CHECKER INTERVIEW QUESTIONS-3

1. In addition to the standard K-series open-web steel joists, steel joists are also available in the LH-series and DLH-series. What to the letters LH and DLH signify?      

LH- Long Span

DLH-Deep Long Span

2.what is the seating depth for K,LH  and joist girder?

K-2  1/2" 

LH-5"

JOIST GIRDER-7  1/2"

3.What is the grade for erection bolts?

A307-MACHINE BOLTS.

4.What is a lintel?

 Lintel is a primary structural number placed above doors, windows or other openings to support masonry above.

Generally we will maintain 8" bearing.

5.What is a sag rod?

A tension member used to limit the movement of a girt or purling in the direction of week axis before

installation of sheeting or roofing.

sag rods is generally known as thru rods.

6.What is a sill, jamb ,header?

SILL: The bottom horizontal member of a door or window openings.

JAMB: Vertical side of a  wall opening.

HEADER: Horizontal  member at the top of wall opening.

7.what are the types of weld joints?

8.What are the types of bolting joints?

1.Bearing joint:

In the bearing joint  load will transfer through bolt.

2.slip critical joint.

In slip critical condition ,load will transfer through friction.

9.What are the short slotted hole size for 3/4"Ø and 7/8"Ø bolt?

1.For 3/4"Ø_13x16"X 1".

2.For 7/8"Ø_15/16"X 1 1/8"

10.What are the OSHA requirements for column?

1.Minimum 4 anchor rods required for column base plate.

2.If column length is above 40'-0 then we need to provide splice connection.

   splice connection application should be 4'-0 from finished floor.

3.Safety cable holes to be provided in perimeter columns for safety purpose.

   generally safety cables are 1'-9" from finished floor.

11.What is a galvanization?

The process of adding zinc coating to steel members to avoid corrosion is known as galvanization.

12.Where we need to follow "NO PAINT" condition?

1.At fireproofing

2.field weld areas.

3.slip critical condition (3"no paint around holes")

4.At shear connectors(NO PAINT ON TOP OF TOP FLANGE).

5.Embeded steel.

13.Why gages are standardized?

1.To maintain proper edge distance.

2.To avoid fasteners enter in to k value(ENCHROCHMENT).

14.What is the grade for shear stud connectors?

A108

15.What is a embed plate?

A steel plate cast into concrete structure which is used to transfer loads from girder joists or beam to

concrete beams.

16.What is the height of guard rail and  hand rail from finish floor?

For guard rail:3'-6" from finish floor.

For  hand rail : 2'-10" from finish floor.

17.when cage is to provided or required in ladder?

If the ladder is above 20'-0"height, We need to provide cage in ladder for safety purpose.

Cage will be start from 7'-0  height.