Code of Massachusetts Regulations › 780 CMR - STATE BOARD OF BUILDING REGULATIONS AND STANDARDS › Chapter 16 - Structural Design › Section 1614 - STRUCTURAL INTEGRITY › Subsection 1614.3 - Frame structures

Current through Register 1525, July 5, 2024
Frame structures shall comply with the requirements of this
				  section.
1614.3.1
Concrete frame
				structures.
Frame structures constructed primarily of reinforced or
				prestressed concrete, either cast-in-place or precast, or a combination of
				these, shall conform to the requirements of ACI 318 Sections 7.13, 13.3.8.5,
				13.3.8.6, 16.5, 18.12.6, 18.12.7 and 18.12.8 as applicable. Where ACI 318
				requires that nonprestressed reinforcing or prestressing steel pass through the
				region bounded by the longitudinal column reinforcement, that reinforcing or
				prestressing steel shall have a minimum nominal tensile strength equal to
				two-thirds of the required one-way vertical strength of the connection of the
				floor or roof system to the column in each direction of beam or slab
				reinforcement passing through the column.
Exception:
Where concrete slabs with continuous
				  reinforcing having an area not less than 0.0015 times the concrete area in each
				  of two orthogonal directions are present and are either monolithic with or
				  equivalently bonded to beams, girders or columns, the longitudinal reinforcing
				  or prestressing steel passing through the column reinforcement shall have a
				  nominal tensile strength of one-third of the required one-way vertical strength
				  of the connection of the floor or roof system to the column in each direction
				  of beam or slab reinforcement passing through the column.
1614.3.2
Structural steel, open web
				steel joist or joist girder, or composite steel and concrete frame
				structures.
Frame structures constructed with a structural steel frame
				or a frame composed of open web steel joists, joist girders with or without
				other structural steel elements or a frame composed of composite steel or
				composite steel joists and reinforced concrete elements shall conform to the
				requirements of this section.
1614.3.2.1
Columns.
Each column splice shall have the minimum design
				strength in tension to transfer the design dead and live load tributary to the
				column between the splice and the splice or base immediately below.
1614.3.2.2
Beams.
End
				connections of all beams and girders shall have a minimum nominal axial tensile
				strength equal to the required vertical shear strength for
allowable
				stress design
(ASD) or two-thirds of the required shear strength for
load and resistance factor design
(LRFD) but not less than 10
				kips (45 kN). For the purpose of this section, the shear force and the axial
				tensile force need not be considered to act simultaneously.
Exception:
Where beams, girders, open web joist
				  and joist girders support a concrete slab or concrete slab on metal deck that
				  is attached to the beam or girder with not less than
				  3/8-inch-diameter (9.5 mm)
				  headed shear studs, at a spacing of not more than 12 inches (305 mm) on center,
				  averaged over the length of the member, or other attachment having equivalent
				  shear strength, and the slab contains continuous distributed reinforcement in
				  each of two orthogonal directions with an area not less than 0.0015 times the
				  concrete area, the nominal axial tension strength of the end connection shall
				  be permitted to be taken as half the required vertical shear strength for ASD
				  or one-third of the required shear strength for LRFD, but not less than 10 kips
				  (45 kN).