ICC S1 Structural Steel and Bolting flashcards

32 cards. Read the term and the definition here. The deck at the top of this page is optional.

Special inspector authority

The special inspector has authority to inspect all structural steel work, access fabrication and erection sites, and must report nonconforming work to the contractor and the building official.

Approved plans requirement

Work must conform to approved construction documents; any deviation requires approval of the building official and the registered design professional before the affected work proceeds.

Preconstruction meeting purpose

A meeting among contractor, fabricator, erector, inspector, and engineer of record held before steel work begins to establish inspection procedures, hold points, and reporting lines.

Weld symbol elements

An AWS A2.4 symbol conveys weld type, size, length, spacing, groove preparation, finish contour, all-around and field designations, and tail references such as process or specification.

Standard hole size

Standard holes are bolt diameter plus 1/16 in. for bolts 1 in. and smaller, and bolt diameter plus 1/8 in. for bolts larger than 1 in.

Slip-critical connection callout

Detailing that identifies slip-critical joints, the required faying-surface class, and hole type, because these govern surface preparation, pretensioning method, and bolting inspection.

ASTM A992 properties

A992 is the standard grade for rolled W-shapes, with minimum yield strength of 50 ksi, minimum tensile strength of 65 ksi, and maximum yield of 65 ksi for ductility.

ASTM A36 properties

A36 carbon steel has a minimum yield strength of 36 ksi and tensile strength from 58 to 80 ksi, commonly used for plates, angles, and miscellaneous members.

Mill test report purpose

Certified mill test reports record heat number, chemical composition, and mechanical properties, allowing the inspector to confirm delivered steel matches the specified ASTM designation.

ASTM F3125 bolt grades

F3125 consolidates the former A325 and A490 standards; Grade A325 has 120 ksi minimum tensile strength up to 1 in. diameter, and Grade A490 has 150 ksi.

Punched hole limitation

Full-size holes may be punched only in material 3/4 in. thick or less; thicker material must be drilled, or subpunched and reamed, per AISC 360.

Piece mark function

Each fabricated member receives a unique mark matching the shop and erection drawings so it can be identified, shipped, and erected in the correct location.

Galvanizing vent and drain

Galvanized members must be detailed with vent and drain holes so molten zinc can flow, and coating thickness per ASTM A123 increases with base metal thickness.

Snug tight definition

A condition where plies are in firm contact, produced by a few impacts of an impact wrench or the full effort of an ironworker on an ordinary spud wrench.

Turn-of-nut rotation

For bolt lengths up to four diameters, turn 1/3 turn for bolts 1 in. and smaller and 1/2 turn for larger bolts, measured from the snug-tight condition.

DTI gap acceptance

A direct tension indicator is properly tightened when the gap under the indicator is 0.005 in. or less, confirmed by refusal of a feeler gauge.

Skidmore-Wilhelm device use

A tension-calibrating device that measures actual bolt tension, used to verify turned-element and torque-wrench methods and confirm the pretension achieved.

Minimum bolt pretension values

Per AISC Table J3.1: 1/2-in. A325 is 12 kips, 3/4-in. is 28 kips, 7/8-in. is 39 kips, and 1-in. is 51 kips; A490 values are higher.

WPS and PQR relationship

The WPS states the welding variables used in production and must be supported by a PQR documenting mechanical test results of a coupon welded with those same variables.

Welder qualification continuity

A welder's performance qualification lapses after six months without welding with that process, and requalification is required before production welding resumes.

Low-hydrogen electrode storage

E7018 electrodes must be stored in heated holding ovens and kept in portable rod ovens in the field to prevent moisture absorption and hydrogen cracking.

Fillet weld gauge use

A gauge used to measure the leg size and throat thickness of a completed fillet weld to verify conformance with the size shown on the drawings.

Column plumbing tolerance

Per the AISC Code of Standard Practice, individual columns must be plumb within 1:500 of their height, measured between working points during erection.

Temporary bracing responsibility

The erector is responsible for providing temporary guying, bracing, and shoring needed to keep the partially completed structure stable until permanent connections are finished.

Drift pin use

Steel pins used to align bolt holes during fit-up; they may bring members into alignment but may not be used to enlarge or distort holes.

Quality control versus assurance

Quality control is the fabricator's or erector's own inspection of its work; quality assurance is independent verification that the required quality control is being performed and effective.

Coating thickness verification

Dry film thickness is measured with a magnetic gauge following SSPC-PA 2 procedures, averaging readings over defined areas and comparing them to the specified thickness.

Faying surface classes

Class A faying surfaces have a mean slip coefficient of 0.33; Class B surfaces, such as blast-cleaned steel, have a mean slip coefficient of 0.50.

IBC structural steel inspection

IBC Section 1705.2 requires special inspection of structural steel, covering welding and bolt installation and verification that member sizes and connections match approved drawings.

Continuous versus periodic inspection

Continuous inspection requires the inspector to be present at all times work is in progress; periodic inspection requires presence only at specified intervals or hold points.

Nonconformance report content

A written record of a deviation from approved documents stating its location, description, disposition, required corrective action, and sign-off when the item is closed.

Final inspection report

The special inspector's closing report to the building official summarizing inspections performed, tests conducted, discrepancies found, and how each discrepancy was resolved.