Code of Massachusetts Regulations › 780 CMR - STATE BOARD OF BUILDING REGULATIONS AND STANDARDS › Chapter 17 - Structural Tests and Special Inspections › Section 1704 - SPECIAL INSPECTIONS › Subsection 1704.3 - Steel construction

Current through Register 1525, July 5, 2024
The
special inspections
for steel elements
				  of buildings and structures shall be as required by Section 1704.3 and Table
				  1704.3.
Exceptions:
1.
Special inspection
of the
				steel fabrication process shall not be required where the fabricator does not
				perform any welding, thermal cutting or heating operation of any kind as part
				of the fabrication process. In such cases, the fabricator shall be required to
				submit a detailed procedure for material control that demonstrates the
				fabricator's ability to maintain suitable records and procedures such that, at
				any time during the fabrication process, the material specification, grade and
				mill test reports for the main stress-carrying elements are capable of being
				determined.
2. The special
				inspector need not be continuously present during welding of the following
				items, provided the materials, welding procedures and qualifications of welders
				are verified prior to the start of the work; periodic inspections are made of
				the work in progress and a visual inspection of all welds is made prior to
				completion or prior to shipment of shop welding.
2.1. Single-pass fillet welds not exceeding
				5/16 inch (7.9 mm) in
				size.
2.2. Floor and roof deck
				welding.
2.3. Welded studs when
				used for structural diaphragm.
2.4.
				Welded sheet steel for cold-formed steel members.
2.5. Welding of stairs and railing systems.
TABLE 1704.3 REQUIRED VERIFICATION AND INSPECTION OF
				  STEEL CONSTRUCTION
VERIFICATION AND INSPECTION
CONTINUOUS
PERIODIC
REFERENCED
							 STANDARDa
IBC REFERENCE
1. Material verification of high-strength
							 bolts, nuts and washers:
a. Identification markings to conform to ASTM
							 standards specified in the approved construction documents.
-
X
AISC 360, Section A3.3 and applicable ASTM material
							 standards
b. Manufacturer's certificate of compliance required.
-
X
-
-
2. Inspection of high-strength
							 bolting:
a. Snug-tight joints.
-
X
AISC 360, Section M2.5
1704.3.3
b. Pretensioned and slip-critical joints using
							 turn-of-nut with matchmarking, twist-off bolt or direct tension indicator
							 methods of installation.
-
X
c. Pretensioned and slip-critical joints using
							 turn-of-nut without matchmarking or calibrated wrench methods of installation.
X
-
3. Material verification of structural
							 steel and cold-formed steel deck:
a. For structural steel, identification markings to
							 conform to AISC 360.
-
X
AISC 360, Section M5.5
b. For other steel, identification markings to conform
							 to ASTM standards specified in the approved construction documents.
-
X
Applicable ASTM material standards
c. Manufacturer's certified test reports.
-
X
4. Material verification of weld filler
							 materials:
a. Identification markings to conform to AWS
							 specification in the approved construction documents.
-
X
AISC 360, Section A3.5 and applicable AWS A5 documents
-
b. Manufacturer's certificate of compliance required.
-
X
-
-
5. Inspection of welding:
a. Structural steel and cold-formed steel
							 deck:
1) Complete and partial joint penetration groove
							 welds.
X
-
AWS D1.1
1704.3.1
2) Multipass fillet welds.
X
-
3) Single-pass fillet welds > 5/16"
X
-
4) Plug and slot welds.
X
-
5) Single-pass fillet welds <= 5/16"
-
X
6) Floor and roof deck welds.
-
X
AWS D1.3
b. Reinforcing steel:
-
1) Verification of weldability of reinforcing steel
							 other than ASTM A 706.
-
X
AWS D1.4 ACI 318:Section 3.5.2
2) Reinforcing steel resisting flexural and axial
							 forces in intermediate and special moment frames, and boundary elements of
							 special structural walls of concrete and shear reinforcement.
X
-
3) Shear reinforcement.
X
-
4) Other reinforcing steel.
-
X
6. Inspection of steel frame joint details
							 for compliance:
a. Details such as bracing and stiffening.
-
X
-
1704.3.2
b. Member locations.
-
X
c. Application of joint details at each connection.
-
X
For SI: 1 inch = 25.4 mm.
a. Where applicable, see also Section 1707.1,
								Special inspection for seismic resistance.
1704.3.1
Welding.
Welding
				inspection and welding inspector qualification shall be in accordance with this
				section.
1704.3.1.1
Structural
				steel.
Welding inspection and welding inspector qualification for
				structural steel shall be in accordance with AWS D1.1.
1704.3.1.2
Cold-formed steel.
Welding inspection and welding inspector qualification for cold-formed steel
				floor and roof decks shall be in accordance with AWS D1.3.
1704.3.1.3
Reinforcing steel.
Welding inspection and welding inspector qualification for reinforcing steel
				shall be in accordance with AWS D1.4 and ACI 318.
1704.3.2
Details.
The special
				inspector shall perform an inspection of the steel frame to verify compliance
				with the details shown on the
approved
construction
				documents
, such as bracing, stiffening, member locations and proper
				application of joint details at each connection.
1704.3.3
High-strength bolts.
Installation of high-strength bolts shall be inspected in accordance with AISC
				360.
1704.3.3.1
General.
While
				the work is in progress, the special inspector shall determine that the
				requirements for bolts, nuts, washers and paint; bolted parts and installation
				and tightening in such standards are met. For bolts requiring pretensioning,
				the special inspector shall observe the preinstallation testing and calibration
				procedures when such procedures are required by the installation method or by
				project plans or specifications; determine that all plies of connected
				materials have been drawn together and properly snugged and monitor the
				installation of bolts to verify that the selected procedure for installation is
				properly used to tighten bolts. For joints required to be tightened only to the
				snug-tight condition, the special inspector need only verify that the connected
				materials have been drawn together and properly snugged.
1704.3.3.2
Periodic monitoring.
Monitoring of bolt installation for pretensioning is permitted to be performed
				on a periodic basis when using the turn-of-nut method with matchmarking
				techniques, the direct tension indicator method or the alternate design
				fastener (twist-off bolt) method. Joints designated as snug tight need be
				inspected only on a periodic basis.
1704.3.3.3
Continuous
				monitoring.
Monitoring of bolt installation for pretensioning using the
				calibrated wrench method or the turn-of-nut method without matchmarking shall
				be performed on a continuous basis.
1704.3.4
Cold-formed steel trusses
				spanning 60 feet or greater.
Where a cold-formed steel truss clear span
				is 60 feet (18 288 mm) or greater, the special inspector shall verify that the
				temporary installation restraint/bracing and the permanent individual truss
				member restraint/bracing are installed in accordance with the
approved
truss submittal package.