Purlin Clamps | McMaster-Carr

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For Beam Shape

Mount Type

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Thread Size

Beam Mount Location

For Suspending

Throat Depth

For Beam Thickness

Material

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Weight Capacity

1,000 lb. to 1,499 lb.

1,500 lb. to 1,999 lb.

Width

Threaded Hole Size

Finish

Beam Width

Mounting Location

REACH

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Export Control Classification Number (ECCN)

EAR99

Specifications Met

ASTM Standard

Federal Specification

Channel Height

For Maximum Lip Height @ Angle

Strut Channel Type

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	00000000	000000	00000000	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	0000000	00000


				A	Flat	1/2"-13	3/4"	500	Clamp On	Locknut	5/8"	1 7/8"	13/16"	1 13/16"	No	0000000	0000
				A	Flat	5/8"-11	3/4"	550	Clamp On	Locknut	5/8"	2 1/16"	1 1/8"	2 1/16"	No	0000000	0000




						Steel

						B	Flat, Taper	3/8"-16	3/4"	400	Clamp On	Locknut	1"	2 1/2"	5/8"	2 3/8"	No	00000000	0000


						B	Flat, Taper	1/2"-13	3/4"	500	Clamp On	Locknut	7/8"	2 1/2"	3/4"	2 3/8"	No	00000000	0000
						B	Flat, Taper	5/8"-11	3/4"	550	Clamp On	Locknut	7/8"	2 3/8"	7/8"	2 3/8"	No	00000000	0000
						B	Flat, Taper	3/4"-10	3/4"	600	Clamp On	Locknut	7/8"	2 3/8"	1"	2 3/8"	No	00000000	00000
						B	Flat, Taper	7/8"-9	1"	900	Clamp On	Locknut	1 1/4"	3 3/8"	1 1/4"	3"	No	00000000	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	0000000	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	0000000	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	0000000	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	0000000	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	0000000	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	0000000	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	000000	0000


										D	Flat, Taper	3/8"-16	3/4"	200	Clamp On	—	1/2"	2 1/4"	1 1/4"	2"	No	000000	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	000000000	0000


												E	Flat, Taper	5/16"-18	3/4"	525	Clamp On	—	11/16"	1 9/16"	1 5/8"	1 11/16"	No	000000000	0000
												E	Flat, Taper	3/8"-16	3/4"	750	Clamp On	—	5/8"	1 7/8"	2"	1 13/16"	No	000000000	0000
												E	Flat, Taper	1/2"-13	7/8"	900	Clamp On	—	7/8"	2 5/8"	2 1/2"	2 3/16"	No	000000000	00000
												E	Flat, Taper	10-24	3/4"	275	Clamp On	—	1/2"	1 3/8"	1 3/16"	1 7/16"	No	000000000	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	000000	00000
E	Flat, Taper											M6 × 1 mm	1/2"	275	Clamp On	—	1/2"	1 1/2"	1 1/8"	1 1/2"	No	000000	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	000000	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	0000000	00000


		E	Flat, Taper									3/8"-16	1"	750	Clamp On	—	3/4"	2"	1 7/8"	2"	No	0000000	00000
		E	Flat, Taper									1/2"-13	1"	1,100	Clamp On	—	3/4"	2 1/4"	2 1/8"	2 1/4"	No	0000000	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	0000000	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	0000000	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	0000000	0000


								G						Flat, Taper	3/8"-16	1 1/4"	250	Clamp On	Locknut	9/16"	2"	7/8"	1 7/8"	No	0000000	0000
								G	Flat, Taper					1/2"-13	13/16"	750	Clamp On	Locknut	9/16"	2 1/8"	1 1/8"	2"	No	0000000	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	0000000	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	000000	00000


										L	Flat, Taper			1/2"-13	3/4"	500	Clamp On	Locknut	1/2"	1 1/2"	7/8"	1 1/2"	No	000000	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	0000000	0000


														J	Flat, Taper	3/8"-16	3/4"	400	Clamp On	Locknut	1/2"	1 1/2"	7/8"	1 1/2"	No	0000000	0000
														J	Flat, Taper	1/2"-13	3/4"	500	Clamp On	Locknut	1/2"	1 1/2"	7/8"	1 1/2"	No	0000000	0000
J														Flat, Taper	5/8"-11	3/4"	600	Clamp On	Locknut	1/2"	1 3/4"	1"	1 1/2"	No	0000000	0000
J	Flat, Taper													3/4"-10	3/4"	800	Clamp On	Locknut	5/8"	2"	1 1/4"	1 3/4"	No	0000000	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	0000000	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	0000000	000000


	Angled	3/8"-16	1/4"	200	Clamp On	—	3/4"	2 3/8"	7/8"	2 3/8"	No	0000000	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	0000000	00000
	Flat, Taper	3/8"-16, 1/2"-13	3/4"	500	Clamp On	—	1"	2"	1"	3"	No	0000000	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	0000000	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	00000000	00000


				Flat, Taper	1/4"-20	5/16"	1/2"	150	Press Fit	7/8"	1 3/8"	2 1/4"	No	00000000	0000
				Flat, Taper	1/4"-20	9/16"	3/4"	150	Press Fit	7/8"	1 3/8"	2 3/8"	No	00000000	0000
				Flat, Taper	3/8"-16	1/8"	1/4"	150	Press Fit	7/8"	1 3/8"	1 7/8"	No	00000000	0000
				Flat, Taper	3/8"-16	5/16"	1/2"	150	Press Fit	7/8"	1 3/8"	2 1/4"	No	00000000	0000
				Flat, Taper	3/8"-16	9/16"	3/4"	150	Press Fit	7/8"	1 3/8"	2 3/8"	No	00000000	0000

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	0000000	000000

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	0000000	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	0000000	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	0000000	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	0000000	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	0000000	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	0000000	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	0000000	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	0000000	00000	—	———	0




						Galvanized Steel

						B	Flat, Taper	—	1/2"	3"	3/8"	700	Clamp On	3 1/2"	1 1/4"	3"	No	0000000	00000	5/16"-18	0000000	00000


						B	Flat, Taper	—	1/2"	4"	1/2"	700	Clamp On	4 3/8"	1 1/4"	3"	No	0000000	00000	5/16"-18	0000000	0000
						B	Flat, Taper	—	1/2"	5"	5/8"	700	Clamp On	5 1/8"	1 1/4"	3"	No	0000000	00000	5/16"-18	0000000	0000
						B	Flat, Taper	—	1/2"	6"	3/4"	700	Clamp On	6 1/2"	1 1/4"	3"	No	0000000	00000	5/16"-18	0000000	0000
						B	Flat, Taper	—	1/2"	7"	7/8"	700	Clamp On	7 3/4"	1 1/4"	3"	No	0000000	00000	5/16"-18	0000000	0000
						B	Flat, Taper	—	5/8"	3"	3/8"	1,000	Clamp On	3 5/8"	2"	3 3/4"	No	0000000	00000	3/8"-16	0000000	0000
						B	Flat, Taper	—	5/8"	4"	1/2"	1,000	Clamp On	4 3/4"	2"	3 3/4"	No	0000000	00000	3/8"-16	0000000	0000
						B	Flat, Taper	—	5/8"	5"	5/8"	1,000	Clamp On	5 3/4"	2"	3 3/4"	No	0000000	00000	3/8"-16	0000000	0000
						B	Flat, Taper	—	5/8"	6"	3/4"	1,000	Clamp On	6 7/8"	2"	3 3/4"	No	0000000	00000	3/8"-16	0000000	0000
						B	Flat, Taper	—	5/8"	7"	7/8"	1,000	Clamp On	7 3/4"	2"	3 3/4"	No	0000000	00000	3/8"-16	0000000	0000
						B	Flat, Taper	—	5/8"	8"	7/8"	1,000	Clamp On	8 5/8"	2"	3 3/4"	No	0000000	00000	3/8"-16	0000000	0000


						B	Flat, Taper	—	3/4"	4"	1/2"	3,000	Clamp On	4 7/8"	2"	4 5/8"	No	0000000	00000	5/8"-11	0000000	0000
						B	Flat, Taper	—	3/4"	5"	5/8"	3,000	Clamp On	5 7/8"	2"	4 5/8"	No	0000000	00000	5/8"-11	0000000	0000
						B	Flat, Taper	—	3/4"	6"	3/4"	3,000	Clamp On	7"	2"	4 5/8"	No	0000000	00000	5/8"-11	0000000	0000
						B	Flat, Taper	—	3/4"	7"	7/8"	3,000	Clamp On	8"	2"	4 5/8"	No	0000000	00000	5/8"-11	0000000	0000
						B	Flat, Taper	—	3/4"	8"	7/8"	3,000	Clamp On	8 7/8"	2"	4 5/8"	No	0000000	00000	5/8"-11	0000000	0000




								304 Stainless Steel

								B	Flat, Taper	—	1/2"	3"	3/8"	700	Clamp On	3 1/2"	1 1/4"	3"	No	0000000	00000	5/16"-18	0000000	00000


								B	Flat, Taper	—	1/2"	4"	1/2"	700	Clamp On	4 3/8"	1 1/4"	3"	No	0000000	00000	5/16"-18	0000000	00000
								B	Flat, Taper	—	1/2"	5"	5/8"	700	Clamp On	5 1/8"	1 1/4"	3"	No	0000000	00000	5/16"-18	0000000	00000
								B	Flat, Taper	—	1/2"	6"	3/4"	700	Clamp On	6 1/2"	1 1/4"	3"	No	0000000	00000	5/16"-18	0000000	00000
								B	Flat, Taper	—	1/2"	7"	7/8"	700	Clamp On	7 3/4"	1 1/4"	3"	No	0000000	00000	5/16"-18	0000000	00000

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"	0000000	000000	0000000	000000
Flat	M12	1"	2 3/8"	625	Clamp On	1 3/8"	2 7/8"	1 1/4"	5 1/2"	0000000	00000	0000000	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"	0000000	00000	0000000	00000
Flat	M20	1 1/4"	3 1/4"	1,875	Clamp On	2"	4 1/8"	1 3/4"	7 1/2"	0000000	000000	0000000	00000
Flat	M24	1 3/4"	3 3/4"	3,125	Clamp On	3"	6 1/4"	2 1/2"	9 1/4"	0000000	000000	———	0

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	0000000	00000


		1 5/8", 2 7/16", 3 1/4"	1 5/8"	3/8"-16	150	0000000	0000