FAQs

Stocking Items (A, B, C items) 
Open lines on orders for stocked items may be modified or canceled prior to the line item on the order being released and scheduled for shipment. 

Made to Order Part Numbers (MTO, “M”, “D” items)
Open lines on orders for Made to Order (MTO) line items (also known as “M” make or "D" items) cannot be changed nor canceled after an order is placed.

*Exceptions can be made with approval from demand planning if the product has not begun production. 

Non-stocking Part Numbers (“N” items) 
Open lines on orders for Non-stocking (“N” items) cannot be changed nor canceled after an order is placed.

*Exceptions can be made with approval from demand/distribution planning if the product is not available at the location the line is sourced on, and if product is not in route to the line’s source location. 

Other Information

• Part number/SKU classification “Class” for the A, B, C, D code is shown on all quotations. Customers are also able to inquire with their Atkore Customer Service
• Representative or their Agent for clarification on item classifications. Atkore reserves the right to update A, B, C, D (M/N) classifications periodically.
• Typically this is done semi-annually in October and April. 
  Please refer to our return policy for any questions on returns and refunds.

Atkore accepts returns on metal framing products provided the return meets the following criteria: 

• Product must be in good condition (undamaged, prime material, clean) AND in original bundle banding or original packaging.
• All fittings must be in full box/bag quantities. 
• Customer pays return freight to Atkore’s desired location. 
• Customer will be billed a 20% restocking fee.
• “Stocked items” are returnable. “D items/Make-To-Order items” are not returnable. 
• Returns are accepted on product purchased within the last 12 months. 
• Sales Agents enter returns in the Salesforce.com system. Returns are approved/rejected in Salesforce.com.
• Upon receipt of returned items Atkore will inspect the product to insure it meets the criteria above. Product in poor condition will not receive credit.

Yes, you can find our UL listed parts here.

Loads in the Beam Load Tables for UNISTRUT® metal framing channel are given as a total uniform load (W) in pounds. For the more familiar uniform load (w) in pounds per foot or pounds per inch, divide the table load by the span. 

Loads under the column headings of “Span / 180”, “Span / 240” and “Span / 360” are provided for installations in which deflection (sag) of the loaded UNISTRUT® channel must be limited. These ratios are standard engineering practice and, when applicable, are usually given by the Professional of Record or the Project Specifications. Actual deflection from these preset ratios equals the span (inches or feet) divided by the number 180, 240 or 360. When designing to one of these deflection limits, the allowed uniform load is generally less than the values under the column heading “Maximum Allowed Uniform Load”. For further information or assistance on this issue, contact UNISTRUT®.

All 5 Notes below the beam load tables must be followed to obtain the final usable load on the channel. Failure to do so produces the wrong working load. These notes require adjustments to the Maximum Allowed Uniform Load for: 

• Pierced Channel (if applicable)
• Unbraced Length 
• Channel Weight 
• Midspan Point Loads (if applicable) 

Use the following 5 Steps to accurately determine the allowed working load of UNISTRUT® channel. 

Step #1 – Determine Maximum Allowed Uniform Load from Load Table 
Step #2 – Multiple by the Applicable Hole Factor  

• 0.95 for “KO”
• 0.90 for “HS” & “H3” 
• 0.85 for “SL” & “T”
• 0.70 for “DS” 

Step #3 – Multiply by the Unbraced Length Factor 
Step #4 – Subtract Channel Weight 
Step #5 – Multiply by 50% for Midpsan Loading, If Applicable.

The result after Step #4 is the net allowed total uniform load in pounds. The result after Step #5 is the allowed midspan point load.

96195

The following torque values shall be used for Unistrut channel nuts and bolts.

Bolt Size	Design (ft.-lbs.)	Maximum (ft.-lbs.)
1/4" – 20	6	7
5/16” - 18	11	15
3/8” – 16	19	25
7/16” - 14	35	43
1/2" – 13	50	70
5/8” – 11	100	125
3/4” – 10	125	135
7/8” - 9	125	135

Rule of Thumb: From a snug tight condition, a full turn of the bolt will approximately result in the Design Torque Value. However, a torque wrench should be used to verify final torque meets the above requirements.

---

Clamp Height - OD Tubing (Top of Clamp Height Above Unistrut Channel for OD Tubing Clamps) 

P/N	OD (in.)	Top of Clamp Height Above Unistrut Channel**		P/N	OD (in.)	Top of Clamp Height Above Unistrut Channel**
P2024	1/4	1		P1121	4 1/2	5 1/2
P2025	3/8	1 1/8		P2059	4 5/8	5 5/8
P2026	1/2	1 1/4		P2060	4 3/4	5 3/4
P2027	5/8	1 1/4		P2061	4 7/8	5 7/8
P2028	3/4	1 1/2		P2062	5	6
P2029	7/8	1 5/8		P2063	5 1/8	6 1/8
P2030	1	1 3/4		P2064	5 1/4	6 1/4
P2031	1 1/8	1 7/8		P2065	5 3/8	6 3/8
P2032	1 1/4	2		P2066	5 1/2	6 1/2
P2033	1 3/8	2 1/8		P2067	5 5/8	6 5/8
P2034	1 1/2	2 1/4		P2068	5 3/4	6 3/4
P2035	1 5/8	2 3/8		P2069	5 7/8	6 7/8
P1430	1 3/4	2 1/2		P2070	6	7
P2037	1 7/8	2 3/4		P2070-61	6 1/8	7 1/8
P2038	2	2 7/8		P2070-62	6 1/4	7 1/4
P2039	2 1/8	3		P2070-63	6 3/8	7 3/8
P2040	2 1/4	3 1/8		P2070-64	6 1/2	7 1/2
P1117	2 3/8	3 1/8		P1124	6 5/8	7 5/8
P2042	2 1/2	3 3/8		P2070-66	6 3/4	7 3/4
P2043	2 5/8	3 1/2		P2070-67	6 7/8	7 7/8
P2044	2 3/4	3 5/8		P2070-70	7	8 1/4
P1118	2 7/8	3 5/8		P2070-71	7 1/8	8 1/4
P2046	3	3 7/8		P2070-72	7 1/4	8 1/4
P2047	3 1/8	4		P2070-73	7 3/8	8 3/8
P2048	3 1/4	4 1/8		P2070-74	7 1/2	8 1/2
P2049	3 3/8	4 1/4		P2070-75	7 5/8	8 5/8
P1119	3 1/2	4 1/4		P2070-76	7 3/4	8 7/8
P2051	3 5/8	4 5/8		P2070-77	7 7/8	8 7/8
P2052	3 3/4	4 3/4		P2070-80	8	9
P2053	3 7/8	4 7/8		P2070-81	8 1/8	9 1/8
P1120	4	5		P2070-82	8 1/4	9 1/4
P2055	4 1/8	5 1/8		P2070-83	8 3/8	9 3/8
P2056	4 1/4	5 1/4		P2070-84	8 1/2	9 1/2

**Rounded up to nearest 1/8”

CLAMP HEIGHT AND HARDWARE PIPE AND RIGID CONDUIT

P/N	Top of Clamp Height Above Unistrut Chanel*
P1109	1 3/8
P1111	1 5/8
P1112	1 3/4
P1113	2 1/8
P1114	2 3/8
P1115	2 5/8
P1117	3 1/8
P1118	3 5/8
P1119	4 1/4
P1120	5
P1121	5 1/2
P1123	6 5/8
P1124	7 5/8
P1126	9 5/8

*Rounded up to the nearest 1/8"

Yes you can find our MasterSpec document here.

Unistrut is a member of the Metal Framing Manufacturer’s Association (MFMA) and actively participated in writing the Metal Framing Standards Publication. The current edition of this document is MFMA-4. 

Unistrut meets or exceeds the requirements of MFMA-4.

UNISTRUT & MSS SP-58, SP-69 & SP-89
Unistrut actively participates on MSS Committee 403, which is responsible for Standard Practices SP-58, SP-69 & SP-89. 

In general, Unistrut products conform to the requirements of MSS SP-58, SP-69 & SP-89 where applicable to the objectives of these standards. Unistrut channel, threaded rod, pipe clamps and beam clamps conform to SP-58, SP-69 & SP-89. By definition, MSS considers continuous concrete inserts (e.g. P3200 Series) devices to which hanger assemblies attach. Therefore, MSS does not have requirements for concrete inserts. However, the material from which Unistrut concrete inserts are made do conform to MSS SP-58, SP-69 & SP-89.

Painting Galvanized (PG or HG) Steel
Painting galvanized steel should follow the procedures established by the Steel Structures Painting Council (SSPC). The recommended procedures and specifications to paint galvanized steel are: 

• SSPC Good Painting Practice, Volume 1, Chapter 22, “Painting Galvanized Steel” 
• SSPC-SP1, “Surface Preparation Specification No. 1 – Solvent Cleaning” 
• SSPC-Paint 27, “Paint Specification No. 27, Basic Zinc Chromate-Vinyl Butyral Wash Primer” 

Unistrut Channel with the Perma-Green is a high quality finish similar to an automotive finish. The best method to topcoat factory painted channel is by using a liquid or powder coat finish.  Both of these are a thermoset finish  and have excellent adhesion and performance.

If the topcoat will be an air-dry paint, the following procedure is suggested:

1. Lightly tack sand the surfaces to be painted. Take the gloss off – do not remove down to metal.
2. Clean off the surfaces and let dry, if required (e.g. if cleaned via damp rag)
3. Apply Air-Dry Paint (listed in order of best probable performance)
   
   • Acrylic Urethane
   • Polyester
   • Alkyd

An air-dry paint used for to over-coated factory painted channel has not been tested. The above procedure is a suggested method for applying an air-dry topcoat. Test data is not available to indicate performance of this type of topcoat.

Unistrut uses MSS SP-69, Section 8.4 for set screw recommended torque.

Torque Values are as follows: