Arizona ROC A-11/CR-17/R-17 Steel and Aluminum Erection Examination

According to AISC specifications, what is the specified minimum yield strength (Fy) and minimum tensile strength (Fu) for standard ASTM A992 wide-flange (W-shape) structural steel members?

• AFy = 50 ksi; Fu = 65 ksi
• BFy = 36 ksi; Fu = 58 ksi
• CFy = 46 ksi; Fu = 60 ksi
• DFy = 70 ksi; Fu = 90 ksi

An ironworker crew is hoisting a carbon steel base plate measuring 5 feet wide, 10 feet long, and 3/4 inch thick. Using the standard steel density rule of 490 lbs/cu ft (40.8 lbs/sq ft per inch of thickness), what is the total calculated weight of this plate?

• A1,020 lbs
• B1,530 lbs
• C1,275 lbs
• D2,040 lbs

A structural detail drawing specifies a beam section labeled 'W14x90'. What do the numbers '14' and '90' designate in standard AISC nomenclature?

• ANominal flange width of 14 inches and nominal depth of 90 inches
• BNominal web thickness of 0.14 inches and yield strength of 90 ksi
• CNominal depth of 14 inches and nominal weight of 90 pounds per linear foot
• DNominal length of 14 feet and total weight capacity of 90 kips

Which structural aluminum alloy temper is most commonly used for extruded structural framing members, angles, and channels due to its high strength and good corrosion resistance?

• A3003-H14
• B5052-H32
• C7075-O
• D6061-T6

A 100-foot-long structural steel bridge girder is installed at 40°F. During peak summer heating, the steel temperature rises to 100°F. Given the coefficient of thermal expansion for structural steel is 6.5 x 10^-6 in/in/°F, how much will the girder expand in length?

• A0.468 inches
• B0.234 inches
• C0.936 inches
• D1.250 inches

When attaching structural aluminum framing members directly to structural carbon steel supports in an exterior environment, what precaution must be taken to prevent galvanic corrosion?

• AFlame-treat the contact surfaces prior to mechanical fastening
• BIsolate the metals using non-conductive dielectric gaskets, elastomeric washers, or alkal…
• CUse un-coated copper fasteners to ground the joint assembly
• DIncrease the tightening torque of carbon steel bolts by 50%

What does the designation '24K8' indicate for an Open Web Steel Joist manufactured under Steel Joist Institute (SJI) specifications?

• A24-inch chord width and 8-kip total point load capacity
• B24-foot maximum span length and 8 gauge top chord steel thickness
• C24-inch overall joist depth and section number 8 (design load designation)
• D24-inch bearing seat depth and 8-inch web angle spacing

What is the primary structural purpose of installing headed shear stud connectors through metal deck onto structural steel floor beams?

• ATo hold temporary perimeter safety net brackets during erection
• BTo allow thermal contraction of the concrete deck without cracking
• CTo ground the metal floor deck against lightning strikes
• DTo transfer horizontal shear forces and create composite action between the concrete slab…

How does the weight density of structural aluminum compare approximately to the weight density of structural carbon steel?

• AAluminum is approximately 1/3 the weight of structural steel
• BAluminum is approximately 1/2 the weight of structural steel
• CAluminum is approximately equal in weight to structural steel
• DAluminum is approximately 1.5 times heavier than structural steel

According to ASTM specifications, what is the specified minimum yield strength for cold-formed welded structural tubing designated as ASTM A500 Grade B (Shaped)?

• A36 ksi
• B46 ksi
• C50 ksi
• D65 ksi

What key characteristic distinguishes ASTM A588 weathering steel from standard ASTM A36 structural carbon steel?

• AIt can be welded without preheating under any ambient temperature
• BIt has a lower density equal to aluminum alloys
• CIt forms a protective, tightly adherent oxide patina when exposed to weather, eliminating…
• DIt cannot be flame-cut with oxy-fuel equipment

Which fastener material is most suitable for joining exterior architectural structural aluminum extrusions to prevent aggressive galvanic degradation of the aluminum?

• AUn-coated carbon steel ASTM A307 bolts
• BHot-dip galvanized A325 structural bolts without washers
• CBare copper-plated alloy steel screws
• DAustenitic 300-series (304 or 316) stainless steel fasteners

A structural plan specifies an Open Web Joist Girder labeled '48G8N10K'. According to Steel Joist Institute (SJI) standards, what does this designation mean?

• A48-inch depth, 8 panel spaces, and a 10-kip concentrated load at each top chord panel poi…
• B48-foot span, 8-inch seat depth, and 10 total joists supported
• C48-kip total uniform load capacity, 8 panel points, and 10-gauge web members
• D48-inch width, 8-kip shear capacity, and 10-inch bottom chord clearance

When storing metal roof and floor deck bundles on a steel erection jobsite, how should the bundles be positioned prior to installation?

• AStacked flat on muddy ground to prevent bowing
• BSlightly sloped to allow water drainage and secured to structural steel to prevent displa…
• CUnbundled immediately and leaned vertically against exterior column bays
• DStacked up to 10 bundles high on un-bridged steel joists

In pre-engineered metal building (PEMB) construction, why are cold-formed Z-purlins preferred over C-channel purlins for continuous roof framing spans?

• AZ-purlins are twice as dense as C-channels of identical thickness
• BZ-purlins do not require sag rods or lateral flange bracing
• CZ-purlins can be nested at lap joints over primary rigid frames to form continuous struct…
• DZ-purlins can be field-welded without removing galvanized coatings

Comparing the Modulus of Elasticity (E) of structural steel to structural aluminum, what are their approximate values, and how does this affect structural deflection?

• ASteel E = 15,000 ksi; Aluminum E = 5,000 ksi (Aluminum deflects 10 times more)
• BSteel E = 10,000 ksi; Aluminum E = 29,000 ksi (Steel deflects ~3 times more under identic…
• CSteel E = 50,000 ksi; Aluminum E = 50,000 ksi (Both have identical deflection behavior)
• DSteel E = 29,000 ksi; Aluminum E = 10,000 ksi (Aluminum deflects ~3 times more under iden…

What is the specified minimum yield strength (Fy) for standard ASTM A36 carbon structural steel plates and angle shapes?

• A36 ksi
• B24 ksi
• C50 ksi
• D60 ksi

In structural aluminum specifications, what does the temper designation '-O' signify (e.g., 6061-O)?

• AOver-aged for maximum hardness
• BAnnealed, softest temper with maximum ductility and lowest yield strength
• CThermally stress-relieved by stretching
• DQuenched in oil immediately after extrusion

When checking wall thickness tolerances for electric-resistance-welded HSS structural tubing under AISC guidelines, what reduction factor is applied to the nominal wall thickness (t) to determine the design wall thickness?

• A0.75 times nominal thickness
• B0.85 times nominal thickness
• C0.93 times nominal thickness
• D1.00 times nominal thickness

What is the primary technical function of architectural anodizing on structural aluminum assemblies?

• ATo weld the outer surface molecules together without filler metal
• BTo lower the electrical conductivity of aluminum for high-voltage towers
• CTo coat the aluminum with a sacrificial layer of molten zinc
• DTo electrochemically thicken the natural oxide surface layer, increasing corrosion resist…

When ordering corrugated steel roof deck, how does the numerical deck gauge number relate to the actual thickness of the sheet steel?

• ALower gauge numbers indicate thicker steel sheets (e.g., 18 ga is thicker than 22 ga)
• BHigher gauge numbers indicate thicker steel sheets (e.g., 22 ga is thicker than 18 ga)
• CGauge numbers equal the thickness in millimeters
• DGauge numbers equal the nominal deck rib depth in inches

An ironworker crew is hoisting a 40-foot-long W18x50 wide-flange steel beam. What is the total bare weight of this beam?

• A720 lbs
• B2,000 lbs
• C1,800 lbs
• D3,600 lbs

How does the coefficient of thermal expansion for structural aluminum (~12.8 x 10^-6 in/in/°F) compare to that of structural steel (~6.5 x 10^-6 in/in/°F)?

• AAluminum expands approximately half as much as steel for a given temperature change
• BAluminum and steel expand at identical rates
• CAluminum expands approximately twice as much as steel for a given temperature change
• DAluminum contracts when heated, while steel expands

Which property makes aluminum alloy 5052-H32 particularly well-suited for architectural sheet metal flashings and marine enclosure plates?

• AHighest tensile strength of any metallic element
• BIdentical thermal expansion coefficient to concrete
• CAbility to withstand 2,000°F continuous heat without loss of strength
• DSuperior corrosion resistance in saltwater/marine environments and excellent cold formabi…

A rigger is lifting a symmetrical 10,000 lb structural bundle using a 2-leg wire rope sling. Each sling leg forms a 45° angle with the horizontal. What is the calculated tension in each sling leg?

• A7,071 lbs
• B5,000 lbs
• C8,660 lbs
• D10,000 lbs

Under OSHA 1926.753, what is the maximum number of structural steel members permitted to be hoisted during a single multi-lift rigging ('Christmas treeing') operation?

• A3 members
• B5 members
• C7 members
• D10 members

According to OSHA 1926.251 and ASME B30.9, what broken-wire condition requires a wire rope sling to be removed from service?

• A3 broken wires in one lay or 1 broken wire at an end connection
• B6 randomly distributed broken wires in one lay or 3 broken wires in one strand in one lay
• C10 randomly distributed broken wires in one rope lay, or 5 broken wires in one strand in…
• D15 broken wires anywhere along the entire rope length

When rigging an asymmetrical structural steel assembly, where must the crane hoist hook be positioned relative to the load's center of gravity (CG) prior to hoisting?

• ADirectly over the geometric center of the structural outline
• BAt the extreme connection point of the primary lifting lug
• C2 feet toward the heaviest end of the member
• DDirectly over the center of gravity of the load

In wire rope rigging, how does bending a wire rope sling around a shackle pin or curved load edge affect the sling's nominal capacity as the D/d ratio (pin diameter D to rope diameter d) decreases below 25?

• ASling capacity decreases due to bending stresses; at D/d = 2, capacity is reduced to roug…
• BSling capacity remains completely unaffected regardless of pin diameter
• CSling capacity increases due to strain hardening of the wires
• DSling capacity is multiplied by a safety factor of 2.0

According to OSHA 1926.251 and ASME B30.9, which grade(s) of steel chain are strictly required for overhead hoisting operations?

• AGrade 30 proof coil chain only
• BGrade 80 or Grade 100 alloy steel chain
• CGrade 70 transport tie-down chain
• DGrade 43 high test carbon chain

When using forged shoulder eye bolts for rigging, how is the working load limit (WLL) affected when the lifting angle is 45° off-axis (angular loading)?

• AThe WLL remains 100% of rated capacity
• BThe WLL is increased by 15% due to shoulder bearing
• CThe WLL is reduced to approximately 30% of rated capacity
• DAngular loading up to 45° is prohibited for shoulder eye bolts

When using a screw-pin shackle in a choke hitch or long-term lifting setup where the pin may rotate against the sling, what safety precaution is mandatory?

• AGrease the pin threads so it spins freely during the lift
• BWelding the pin directly to the shackle bow
• CBack off the pin 2 full turns after hand tightening
• DMouse (wire-lock) or pin the screw pin to prevent it from unthreading, or use a bolt-type…

Which standard ASME B30.5 hand signal is performed by extending both arms horizontally with palms down and moving arms rapidly back and forth?

• AEmergency Stop
• BStop
• CLower Boom
• DDog Everything

When rigging a bundle of steel angles with a wire rope sling in a choker hitch, what is the sling capacity efficiency factor when the choke angle is between 120° and 180°?

• A100% (1.00 factor)
• B75% (0.75 factor)
• C50% (0.50 factor)
• D25% (0.25 factor)

During a pre-shift rigging inspection, a rigger notices exposed red core yarns on a synthetic web sling. What action is required under OSHA 1926.251?

• AWrap the damaged area with electrical tape and reduce WLL by 25%
• BUse the sling only for lifts under 500 lbs
• CImmediately remove the sling from service and destroy or discard it
• DApply rubber cement to seal the outer jacket

A rigger must calculate the weight of a solid steel cylindrical pin measuring 2 feet in diameter and 10 feet in length. Using steel density = 490 lbs/cu ft, what is the approximate load weight? (Volume = π x r^2 x L)

• A7,697 lbs
• B61,575 lbs
• C30,788 lbs
• D15,394 lbs

What is the standard hand signal for 'Hoist' (raise the hook) according to ASME B30.5?

• AWith forearm vertical, forefinger pointing up, move hand in small horizontal circles
• BWith arm extended downward, forefinger pointing down, move hand in small horizontal circl…
• CExtend arm horizontally with palm down and wave hand back and forth
• DTap elbow with one hand while holding arm aloft

What is the primary structural advantage of using a certified spreader beam when lifting long, slender aluminum trusses?

• AIt doubles the crane hoist line speed
• BIt eliminates compressive forces on the lifted member by maintaining vertical sling legs…
• CIt eliminates the need for tag lines during wind gusts
• DIt reduces total lifted load weight by half

According to OSHA 1926.753(d), when are tag lines required during structural steel hoisting operations?

• AOnly when lifting loads exceeding 50,000 lbs
• BTag lines are strictly prohibited near mobile cranes
• CTag lines must be used whenever necessary to control the load, unless their use creates a…
• DTag lines are required only during rainy weather

When performing multi-lift rigging ('Christmas treeing') under OSHA 1926.753, what design safety factor is required for all components of the multi-lift rigging assembly?

• A2 to 1 safety factor
• B3 to 1 safety factor
• C10 to 1 safety factor
• D5 to 1 safety factor

Under OSHA 1926.752, structural steel erection shall not begin until the controlling contractor provides written notification that concrete in footings, piers, and walls has achieved what minimum compressive design strength?

• A75% of intended design compressive strength
• B50% of intended design compressive strength
• C90% of intended design compressive strength
• D100% of intended design compressive strength

According to the AISC Code of Standard Practice (COSP), what is the maximum allowable out-of-plumb tolerance for an exterior structural steel column prior to cladding attachment?

• A1:100 (1 inch per 8.3 feet)
• B1:500 (1/4 inch per 10 feet, maximum 1 inch toward building line)
• C1:250 (1 inch per 20.8 feet)
• D1:1000 (1/16 inch per 10 feet)

When erecting a beam that connects to a column web sharing common bolts with another beam on the opposite side (double connection), what does OSHA 1926.756 require to prevent collapse during positioning?

• AThe crane hook must hold both beams simultaneously with two independent winches
• BDouble connections must be completely welded prior to hoisting the second beam
• CA seat angle must be provided, or at least one bolt must remain connected to hold the fir…
• DConnectors must install temporary C-clamps across the column web

Under OSHA 1926.757(a)(8), connections of individual steel joists to steel structures must be fabricated to allow field bolting during erection in bays of at least what size?

• AJoists over 20 feet
• BJoists over 80 feet
• CJoists over 60 feet
• DBays of 40 feet or more

Under OSHA 1926.757(d)(2), what erection bridging must be installed and anchored before the hoisting cable is released from a steel joist spanning over 60 feet through 100 feet?

• ATwo rows of bolted diagonal erection bridging installed near the third points of the jois…
• BHoisting lines may be released immediately after tack welding one joist seat
• CBridging is only required after metal decking is fully puddle-welded
• DConcrete topping must be poured before releasing the crane line

When installing temporary guy wires and turnbuckles to plumb up a multi-story structural steel frame, when can the temporary guy wires be safely removed?

• AImmediately after snug-tightening base plate anchor bolts
• BOnly after permanent structural bracing, shear walls, or floor diaphragms are fully conne…
• CAs soon as the crane unhooks from the roof beams
• DAfter the first layer of primer paint dries