Purlin Clamps | McMaster-Carr

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1,000 lb. to 1,499 lb.

1,500 lb. to 1,999 lb.

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Fed. Spec. WW-H-171 Type 19

Fed. Spec. WW-H-171 Type 21

Fed. Spec. WW-H-171 Type 23

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99 Products

Angled Beam Clamps for Threaded Rods

Also known as purlin clamps, these clamps are shaped to fit around beams that have a 45° or 90° lip.

Zinc-Plated Iron—Zinc-plated iron clamps have mild corrosion resistance.

												Iron		Zinc-Plated Iron
	For Beam Shape	For Thread Size	For Max. Lip Ht. @ Angle	For Max. Beam Thk.	Wt. Cap., lb.	Mount Type	Throat Dp.	Lg.	Wd.	Ht.	Threaded Rod Included		Each		Each
Bottom Beam Mount



		Angled, Flat, Taper	3/8"-16	1 1/2" @ 90°, 2" @ 45°	1"	400	Clamp On	13/16"	3"	1"	3 3/8"	No	11365T18	000000	11365T19	000000

Beam Clamps for Threaded Rods


Style A	Style B	Style C	Style D

Style E	Style F	Style G	Style H

Style J	Style K	Style L

Attach these clamps to the flange of a beam, then hang threaded rods from the threaded hole.

304 Stainless Steel—304 stainless steel clamps have excellent corrosion resistance and good chemical resistance.

Zinc-Plated Steel—Zinc-plated steel clamps have good corrosion resistance.

Zinc-Plated Iron—Zinc-plated iron clamps have mild corrosion resistance.

316 Stainless Steel—316 stainless steel clamps have excellent corrosion resistance and chemical resistance.

Styles A, B, C, F, G, J, K, and L—Styles A, B, C, F, G, J, K, and L have a locknut to prevent loosening.

Styles D, E, and H—Styles D, E, and H have a threaded hole on the back for supporting a hanger or routing ring.

	Style	For Beam Shape	For Thread Size	For Max. Beam Thk.	Wt. Cap., lb.	Mount Type	Nut Type	Throat Dp.	Lg.	Wd.	Ht.	Threaded Rod Included		Each
Bottom Beam Mount







				Iron

				A	Flat	3/8"-16	3/4"	400	Clamp On	Locknut	5/8"	1 7/8"	13/16"	1 13/16"	No	3048T51	00000


				A	Flat	1/2"-13	3/4"	500	Clamp On	Locknut	5/8"	1 7/8"	13/16"	1 13/16"	No	3048T61	0000
				A	Flat	5/8"-11	3/4"	550	Clamp On	Locknut	5/8"	2 1/16"	1 1/8"	2 1/16"	No	3048T43	0000




						Steel

						B	Flat, Taper	3/8"-16	3/4"	400	Clamp On	Locknut	1"	2 1/2"	5/8"	2 3/8"	No	29915T81	0000


						B	Flat, Taper	1/2"-13	3/4"	500	Clamp On	Locknut	7/8"	2 1/2"	3/4"	2 3/8"	No	29915T82	0000
						B	Flat, Taper	5/8"-11	3/4"	550	Clamp On	Locknut	7/8"	2 3/8"	7/8"	2 3/8"	No	29915T83	0000
						B	Flat, Taper	3/4"-10	3/4"	600	Clamp On	Locknut	7/8"	2 3/8"	1"	2 3/8"	No	29915T84	00000
						B	Flat, Taper	7/8"-9	1"	900	Clamp On	Locknut	1 1/4"	3 3/8"	1 1/4"	3"	No	29915T85	00000
						C	Flat, Taper	3/8"-16	5/8"	1,500	Clamp On	Locknut	3/4"	1 1/2"	3/4"	1 1/2"	No	3235T81	0000
						C	Flat, Taper	3/8"-16	7/8"	1,500	Clamp On	Locknut	15/16"	1 5/8"	3/4"	1 3/4"	No	3235T82	0000
						C	Flat, Taper	1/2"-13	5/8"	4,050	Clamp On	Locknut	7/8"	1 11/16"	1 1/4"	1 1/2"	No	3235T83	0000
						C	Flat, Taper	1/2"-13	7/8"	4,050	Clamp On	Locknut	1"	1 7/8"	1 1/2"	1 3/4"	No	3235T84	00000




								304 Stainless Steel

								B	Flat, Taper	3/8"-16	13/16"	400	Clamp On	Locknut	1"	2 3/8"	5/8"	2 3/8"	No	3241T38	00000


								B	Flat, Taper	1/2"-13	13/16"	500	Clamp On	Locknut	1 1/16"	2 3/8"	3/4"	2 3/8"	No	3241T39	00000




										Zinc-Plated Steel

										D	Flat, Taper	1/4"-20	1/2"	75	Clamp On	—	1/2"	1 3/4"	7/8"	1 1/2"	No	3044T1	0000


										D	Flat, Taper	3/8"-16	3/4"	200	Clamp On	—	1/2"	2 1/4"	1 1/4"	2"	No	3044T2	0000




												Zinc-Plated Iron

												E	Flat, Taper	1/4"-20	5/8"	275	Clamp On	—	1/2"	1 3/8"	1 1/8"	1 3/8"	No	88715T713	0000


												E	Flat, Taper	5/16"-18	3/4"	525	Clamp On	—	11/16"	1 9/16"	1 5/8"	1 11/16"	No	88715T717	0000
												E	Flat, Taper	3/8"-16	3/4"	750	Clamp On	—	5/8"	1 7/8"	2"	1 13/16"	No	88715T718	0000
												E	Flat, Taper	1/2"-13	7/8"	900	Clamp On	—	7/8"	2 5/8"	2 1/2"	2 3/16"	No	88715T719	00000
												E	Flat, Taper	10-24	3/4"	275	Clamp On	—	1/2"	1 3/8"	1 3/16"	1 7/16"	No	88715T712	0000
E												Flat, Taper	M10 × 1.5 mm	3/4"	525	Clamp On	—	1/2"	1 5/8"	1 5/8"	1 3/4"	No	3173T5	00000
E	Flat, Taper											M6 × 1 mm	1/2"	275	Clamp On	—	1/2"	1 1/2"	1 1/8"	1 1/2"	No	3173T2	00000
E	Flat, Taper											M8 × 1.25 mm	1/2"	275	Clamp On	—	1/2"	1 1/2"	1 1/8"	1 1/2"	No	3173T4	00000




		316 Stainless Steel

		E	Flat, Taper									1/4"-20	3/4"	150	Clamp On	—	1/2"	1 3/8"	7/8"	1 1/2"	No	29615T1	00000


		E	Flat, Taper									3/8"-16	1"	750	Clamp On	—	3/4"	2"	1 7/8"	2"	No	29615T2	00000
		E	Flat, Taper									1/2"-13	1"	1,100	Clamp On	—	3/4"	2 1/4"	2 1/8"	2 1/4"	No	29615T3	00000


		Top Beam Mount







												Iron

												F	Flat, Taper	5/8"-11	1 5/16"	1,200	Clamp On	Locknut	3/4"	2 3/16"	1"	2 1/4"	No	3027T95	00000


												F	Flat, Taper	3/4"-10	1 5/16"	1,600	Clamp On	Locknut	3/4"	2 7/16"	1 1/4"	2 3/8"	No	3027T96	00000


												Bottom and Top Beam Mount







														Iron

														G	Flat, Taper	3/8"-16	13/16"	250	Clamp On	Locknut	9/16"	2"	7/8"	1 3/8"	No	3027T87	0000


								G						Flat, Taper	3/8"-16	1 1/4"	250	Clamp On	Locknut	9/16"	2"	7/8"	1 7/8"	No	3027T93	0000
								G	Flat, Taper					1/2"-13	13/16"	750	Clamp On	Locknut	9/16"	2 1/8"	1 1/8"	2"	No	3027T88	0000
								G	Flat, Taper					1/2"-13	1 1/4"	750	Clamp On	Locknut	9/16"	2 1/8"	1 1/8"	2 1/2"	No	3027T94	0000




														304 Stainless Steel

														K	Flat, Taper	3/8"-16	3/4"	400	Clamp On	Locknut	1/2"	1 3/16"	15/16"	1 5/8"	No	3020T1	00000


										L	Flat, Taper			1/2"-13	3/4"	500	Clamp On	Locknut	1/2"	1 1/2"	7/8"	1 1/2"	No	3020T2	00000




														Zinc-Plated Iron

														H	Flat, Taper	1/4"-20	7/8"	100	Clamp On	—	1/2"	1 1/2"	5/8"	1 5/8"	No	3027T76	0000


														J	Flat, Taper	3/8"-16	3/4"	400	Clamp On	Locknut	1/2"	1 1/2"	7/8"	1 1/2"	No	3027T11	0000
														J	Flat, Taper	1/2"-13	3/4"	500	Clamp On	Locknut	1/2"	1 1/2"	7/8"	1 1/2"	No	3027T12	0000
J														Flat, Taper	5/8"-11	3/4"	600	Clamp On	Locknut	1/2"	1 3/4"	1"	1 1/2"	No	3027T13	0000
J	Flat, Taper													3/4"-10	3/4"	800	Clamp On	Locknut	5/8"	2"	1 1/4"	1 3/4"	No	3027T34	00000
J	Flat, Taper													7/8"-9	3/4"	1,200	Clamp On	Locknut	5/8"	2 1/4"	1 1/4"	1 3/4"	No	3027T35	00000

Sloped Beam Clamps for Threaded Rods

These clamps rotate and pivot to ensure rods hang straight, even on sloped beams.

Zinc-Plated Steel and Zinc-Plated Iron—Clamps are zinc-plated steel or iron for mild corrosion resistance.

	Wt. Cap., lb.	Mount Type	Nut Type	Throat Dp.	Lg.	Wd.	Ht.	Threaded Rod Included		Each
Bottom Beam Mount







	Zinc-Plated Steel

	Angled	1/4"-20	1/4"	160	Clamp On	—	3/4"	2 3/8"	7/8"	2 3/8"	No	4725T32	000000


	Angled	3/8"-16	1/4"	200	Clamp On	—	3/4"	2 3/8"	7/8"	2 3/8"	No	4725T33	00000
	Flat, Taper	3/8"-16	11/16"	330	Clamp On	Locknut	1 1/16"	2 1/16"	2 1/16"	3 1/8"	No	4725T23	00000
	Flat, Taper	3/8"-16, 1/2"-13	3/4"	500	Clamp On	—	1"	2"	1"	3"	No	4725T31	00000


	Bottom and Top Beam Mount







					Zinc-Plated Iron

					Flat, Taper	3/8"-16	3/4"	540	Clamp On	Locknut	7/8"	1 3/4"	7/8"	3 3/16"	No	4725T51	00000

Press-Fit Beam Clamps for Threaded Rods

A toothed clip secures these clamps to the beam—no fasteners required. Lightly tap with a hammer to install.

			For Beam Thk.
	For Beam Shape	For Thread Size	Min.	Max.	Wt. Cap., lb.	Mount Type	Lg.	Wd.	Ht.	Threaded Rod Included		Each
Bottom and Top Beam Mount







				Steel

				Flat, Taper	1/4"-20	1/8"	1/4"	150	Press Fit	7/8"	1 3/8"	1 7/8"	No	11715T81	00000


				Flat, Taper	1/4"-20	5/16"	1/2"	150	Press Fit	7/8"	1 3/8"	2 1/4"	No	11715T82	0000
				Flat, Taper	1/4"-20	9/16"	3/4"	150	Press Fit	7/8"	1 3/8"	2 3/8"	No	11715T83	0000
				Flat, Taper	3/8"-16	1/8"	1/4"	150	Press Fit	7/8"	1 3/8"	1 7/8"	No	11715T84	0000
				Flat, Taper	3/8"-16	5/16"	1/2"	150	Press Fit	7/8"	1 3/8"	2 1/4"	No	11715T85	0000
				Flat, Taper	3/8"-16	9/16"	3/4"	150	Press Fit	7/8"	1 3/8"	2 3/8"	No	11715T86	0000

Clamp-On Strut Channel Beam Mounts


Style 2	Style 3

Attach strut channel to structural beams without welding or drilling. Since these mounts clamp into place, you can easily reposition them as your needs change.

Style 2—A plate on the bottom slides into the channel and holds the lip. Secure these mounts with the included bolt, then tighten the locknut to prevent loosening. A threaded hole on the bottom connects threaded rod.

Style 3—These mounts wrap around channel and support it from the bottom. Tighten the bolt onto the beam and secure with the locknut to prevent loosening. The threaded hole on the bottom connects threaded rod. Use in pairs; weight capacity is per pair.

Zinc-Plated Steel—Strong and durable with a zinc plating that protects from occasional exposure to moisture.

		For Channel
	Material	Ht.	Wd.	For Beam Shape	For Beam Thk.	Wt. Cap., lb.	Nut Type	Throat Dp.	Lg.	Wd.	Ht.	For Thread Size	Mounting Fasteners Included	Pkg. Qty.		Pkg.
Style 2



		Zinc-Plated Steel	1 5/8" to 3 1/4"	1 5/8"	Flat, Taper	5/8"	250	Locknut	1 1/4"	2 3/8"	1/4"	2 3/4"	3/8"-16	Yes	1	1815T31	000000


		Zinc-Plated Steel	1 5/8" to 3 1/4"	1 5/8"	Flat, Taper	5/8"	350	Locknut	1 1/4"	2 3/8"	1/4"	2 3/4"	1/2"-13	Yes	1	1815T42	00000


		Style 3



				Zinc-Plated Steel	13/16" to 1 5/8"	1 5/8"	Flat, Taper	1 5/8"	400	Locknut	5/8"	2 1/2"	1 3/4"	3 3/4"	3/8"-16	Yes	1	1815T21	00000

Center-Mount Beam Clamps for Threaded Rods


Style A	Style B (Eye Nut Sold Separately)

For centered load distribution, these clamps grip both sides of the beam and hang threaded rods from below.

Galvanized Steel—Galvanized steel clamps have good corrosion resistance.

304 Stainless Steel—304 stainless steel clamps have excellent corrosion resistance and good chemical resistance.

Style A—Style A clamps have an adjusting screw to fit a range of beam widths and an eye nut for hanging threaded rods.

Style B—Style B clamps have a hanging bolt that slides through an eye nut (sold separately).

	Clamps														Eye Nuts
	Style	For Beam Shape	For Thread Size	For Min. Eye Dia.	For Beam Wd.	For Max. Beam Thk.	Wt. Cap., lb.	Mount Type	Lg.	Wd.	Ht.	Threaded Rod Included		Each	Thread Size		Each
Bottom-Center Beam Mount







				Iron

				A	Flat, Taper	3/8"-16	—	2" to 7"	9/16"	600	Clamp On	10"	1 1/8"	5 5/16"	No	3266T43	000000	—	———	0


				A	Flat, Taper	1/2"-13	—	2" to 7"	9/16"	1,125	Clamp On	10"	1 1/8"	5 5/16"	No	3266T44	00000	—	———	0
				A	Flat, Taper	5/8"-11	—	2" to 7"	9/16"	1,350	Clamp On	10"	1 1/8"	5 1/2"	No	3266T45	00000	—	———	0
				A	Flat, Taper	3/4"-10	—	2" to 7"	9/16"	1,350	Clamp On	10"	1 1/8"	5 1/2"	No	3266T46	00000	—	———	0
				A	Flat, Taper	7/8"-9	—	2" to 7"	9/16"	1,350	Clamp On	10"	1 1/8"	5 3/4"	No	3266T52	00000	—	———	0




						Galvanized Steel

						B	Flat, Taper	—	1/2"	3"	3/8"	700	Clamp On	3 1/2"	1 1/4"	3"	No	3045T51	00000	5/16"-18	3019T15	00000


						B	Flat, Taper	—	1/2"	4"	1/2"	700	Clamp On	4 3/8"	1 1/4"	3"	No	3045T52	00000	5/16"-18	3019T15	0000
						B	Flat, Taper	—	1/2"	5"	5/8"	700	Clamp On	5 1/8"	1 1/4"	3"	No	3045T53	00000	5/16"-18	3019T15	0000
						B	Flat, Taper	—	1/2"	6"	3/4"	700	Clamp On	6 1/2"	1 1/4"	3"	No	3045T54	00000	5/16"-18	3019T15	0000
						B	Flat, Taper	—	1/2"	7"	7/8"	700	Clamp On	7 3/4"	1 1/4"	3"	No	3045T55	00000	5/16"-18	3019T15	0000
						B	Flat, Taper	—	5/8"	3"	3/8"	1,000	Clamp On	3 5/8"	2"	3 3/4"	No	3045T74	00000	3/8"-16	3019T16	0000
						B	Flat, Taper	—	5/8"	4"	1/2"	1,000	Clamp On	4 3/4"	2"	3 3/4"	No	3045T75	00000	3/8"-16	3019T16	0000
						B	Flat, Taper	—	5/8"	5"	5/8"	1,000	Clamp On	5 3/4"	2"	3 3/4"	No	3045T76	00000	3/8"-16	3019T16	0000
						B	Flat, Taper	—	5/8"	6"	3/4"	1,000	Clamp On	6 7/8"	2"	3 3/4"	No	3045T77	00000	3/8"-16	3019T16	0000
						B	Flat, Taper	—	5/8"	7"	7/8"	1,000	Clamp On	7 3/4"	2"	3 3/4"	No	3045T78	00000	3/8"-16	3019T16	0000
						B	Flat, Taper	—	5/8"	8"	7/8"	1,000	Clamp On	8 5/8"	2"	3 3/4"	No	3045T79	00000	3/8"-16	3019T16	0000


						B	Flat, Taper	—	3/4"	4"	1/2"	3,000	Clamp On	4 7/8"	2"	4 5/8"	No	3045T81	00000	5/8"-11	3019T19	00000
						B	Flat, Taper	—	3/4"	5"	5/8"	3,000	Clamp On	5 7/8"	2"	4 5/8"	No	3045T82	00000	5/8"-11	3019T19	00000
						B	Flat, Taper	—	3/4"	6"	3/4"	3,000	Clamp On	7"	2"	4 5/8"	No	3045T83	00000	5/8"-11	3019T19	00000
						B	Flat, Taper	—	3/4"	7"	7/8"	3,000	Clamp On	8"	2"	4 5/8"	No	3045T84	00000	5/8"-11	3019T19	00000
						B	Flat, Taper	—	3/4"	8"	7/8"	3,000	Clamp On	8 7/8"	2"	4 5/8"	No	3045T85	00000	5/8"-11	3019T19	00000




								304 Stainless Steel

								B	Flat, Taper	—	1/2"	3"	3/8"	700	Clamp On	3 1/2"	1 1/4"	3"	No	3086T31	00000	5/16"-18	3061T15	00000


								B	Flat, Taper	—	1/2"	4"	1/2"	700	Clamp On	4 3/8"	1 1/4"	3"	No	3086T32	00000	5/16"-18	3061T15	00000
								B	Flat, Taper	—	1/2"	5"	5/8"	700	Clamp On	5 1/8"	1 1/4"	3"	No	3086T33	00000	5/16"-18	3061T15	00000
								B	Flat, Taper	—	1/2"	6"	3/4"	700	Clamp On	6 1/2"	1 1/4"	3"	No	3086T34	00000	5/16"-18	3061T15	00000
								B	Flat, Taper	—	1/2"	7"	7/8"	700	Clamp On	7 3/4"	1 1/4"	3"	No	3086T35	00000	5/16"-18	3061T15	00000

Angle Iron Beam Clamps for Threaded Rods


	Shown With One Pair of Angles	Shown with Two Pairs of Angles

A secure way to hang threaded rods from a pair of angles, such as those used in ceiling joists, without the need to drill or weld. These clamps are commonly used to suspend HVAC, conveyor, and other overhead systems. They may also be used to connect two pairs of angles at 90°. Clamps are zinc-plated steel for good corrosion resistance. Each clamp includes a bracket and square washer. Secure with a hex nut (sold separately).

Capacity is the maximum load for two clamps holding a pair of angles across parallel joists. The values listed are for the maximum distance between joists, which is 6 ft. For shorter distances, capacities are higher.

											Washer
For Thread Size	For Angle Thk.	For Max. Beam Span, ft.	Wt. Cap., lb.	Mount Type	Inside Wd.	Lg.	Wd.	Ht.	Thk.	Threaded Rod Included	Material	No. Included		Each







			Zinc-Plated Steel

			5/8"-11, 5/8"-18	3/16" to 1/4"	6	500	Clamp On	1 1/2"	2 3/8"	2"	2"	1/4"	No	Steel	1	2465N11	000000

Strut Channel Hangers

Suspend chain, wire rope, pipe, and threaded rod from strut channel. These hangers slip over the channel’s lip, so you can install them anywhere along its length.

For Suspending Threaded Rods

	For Channel
	Ht.	Wd.	For Threaded Rod Size	Wt. Cap., lb.		Each
Steel



		1 5/8", 2 7/16", 3 1/4"	1 5/8"	1/4"-20	150	3217T17	00000


		1 5/8", 2 7/16", 3 1/4"	1 5/8"	3/8"-16	150	3217T18	0000

Parallel Beam-to-Beam Clamps

Join two beams in a straight line without drilling or welding. The bolt can be removed to insert threaded rods.

Galvanized Iron—Galvanized iron clamps have better corrosion resistance than zinc-plated iron clamps.

Zinc-Plated Iron—Zinc-plated iron clamps have mild corrosion resistance.

		For Beam Thk.								Galvanized Iron		Zinc-Plated Iron
For Beam Shape	For Thread Size	Min.	Max.	Wt. Cap., lb.	Mount Type	Throat Dp.	Lg.	Wd.	Ht.		Each		Each
Flat	M10	3/4"	1 11/16"	425	Clamp On	1"	2 1/8"	1"	3 3/4"	3272T46	000000	3272T41	000000
Flat	M12	1"	2 3/8"	625	Clamp On	1 3/8"	2 7/8"	1 1/4"	5 1/2"	3272T47	00000	3272T42	00000
Flat	M16	1 1/8"	2 3/4"	1,250	Clamp On	1 11/16"	3 1/2"	1 3/8"	5 3/8"	3272T48	00000	3272T43	00000
Flat	M20	1 1/4"	3 1/4"	1,875	Clamp On	2"	4 1/8"	1 3/4"	7 1/2"	3272T49	00000	3272T44	00000
Flat	M24	1 3/4"	3 3/4"	3,125	Clamp On	3"	6 1/4"	2 1/2"	9 1/4"	3272T51	000000	———	0