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Under-Flange (UF) Connections

Connection Number	Max. Girder Flange Width (in) Width	Min. Girder Depth	Min. Joist Depth	Max. Joist Vertical LRFD Reaction (kips)	Number of Bolts	Bolt Diam. (in)	Bolt Grade ASTM	Hole Diam. in Joist End Plate (in)	Slot Width in Shear Tab (in)	Slot Length in Shear Tab (in)	Connection Drawing
NMUFC-1	11.50	16	18	62	3	1.00	A490-N	1.125	1.125	1.3125	NMUFC-1.pdf
NMUFC-1A	17.50	16	18	62	3	1.00	A490-N	1.125	1.125	1.3125	NMUFC-1A.pdf
NMUFC-2	11.50	18	18	97	4	1.00	A490-N	1.125	1.125	1.3125	NMUFC-2.pdf
NMUFC-2A	17.50	18	18	97	4	1.00	A490-N	1.125	1.125	1.3125	NMUFC-2A.pdf
NMUFC-3	11.50	21	18	145	4	1.25	A490-N	1.375	1.375	1.625	NMUFC-3.pdf
NMUFC-3A	17.50	21	18	145	4	1.25	A490-N	1.375	1.375	1.625	NMUFC-3A.pdf

Extended-Tab (ET) Connections

Connection Number	Max. Girder Flange Width (in) Width	Min. Girder Depth	Min. Joist Depth	Max. Joist Vertical LRFD Reaction (kips)	Number of Bolts	Bolt Diam. (in)	Bolt Grade ASTM	Hole Diam. in Joist End Plate (in)	Slot Width in Shear Tab (in)	Slot Length in Shear Tab (in)	Connection Drawing
NMETC-1	11.50	18	18	26	3	1.00	A490-N	1.125	1.125	1.3125	NMETC-1.pdf
NMETC-2	11.50	21	20	47	4	1.00	A490-N	1.125	1.125	1.3125	NMETC-2.pdf
NMETC-2A	17.50	21	20	35	4	1.00	A490-N	1.125	1.125	1.3125	NMETC-2A.pdf
NMETC-3	11.50	24	22	90	4	1.25	A490-N	1.375	1.375	1.625	NMETC-3.pdf
NMETC-3A	17.50	24	22	65	4	1.25	A490-N	1.375	1.375	1.625	NMETC-3A.pdf
NMETC-4	11.50	30	26	114	5	1.25	A490-N	1.375	1.375	1.625	NMETC-4.pdf
NMETC-4A	17.50	30	26	100	5	1.25	A490-N	1.375	1.375	1.625	NMETC-4A.pdf
NMETC-5	11.50	33	30	136	6	1.25	A490-N	1.375	1.375	1.625	NMETC-5.pdf
NMETC-5A	17.50	33	30	136	6	1.25	A490-N	1.375	1.375	1.625	NMETC-5A.pdf

DESIGN RESPONSIBILITY NOTICE: Our published set of standards for flush-frame connections are provided as design aids to expedite the design and coordination of open-web steel joists with flush-framed connections to wide-flange girders. The project engineer of record (EOR) is solely responsible for the design of the structure, the specification of the joists, and the selection of appropriate connections between the joist and wide-flange girder. To that end, these details may be used as-is or adapted by the EOR as appropriate to the specific project conditions, including the size of the beam shear tab, size of bolts, grade of bolts, quantity of bolts, and weldment of beam tab plate to the wide-flange girder with appropriate weld size proportionate to the web thickness of the wide-flange girder. New Millennium provides design calculations for each standard connection detail for the EOR to use in validating strength and assessing appropriateness to the specific project. New Millennium is not responsible for verifying whether these connection designs are appropriate for use in any given condition on any given project.

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