PG40 120 x 80 mm Ten Slot Aluminium Strut Profile Wide Heavy Beam

OEM / ODM Available Free Sample Available Mill certificate to EN 10204 3.1 on request, RoHS and REACH declarations

120 x 80 mm ten-slot aluminium strut profile with six slots on the two 120 mm faces and four on the 80 mm faces. Wide heavy beam for large-scale structural frames using M8 fasteners.

Wholesale Price Quoted per metre against section, machining and quantity per per metre

Material	Aluminium
Alloy Grade	6063-T5
Temper	T5
Section Size	120 x 80 mm rectangular, ten slots, heavy-wall, all faces slotted
Slot	10 x 10.2 mm groove, 8 mm mouth, 3 per 120 mm face + 2 per 80 mm face, 40 mm pitch, M8
Length	6 m stock, cut to drawing to +/-0.5 mm
Tolerance	EN 755-9 / GB/T 6892, wall +/-0.15 mm
Surface	Mill finish / clear anodised / black anodised
MOQ	Made to order; minimum extrusion run applies for this section size; small trial lengths from stock on request
Lead Time	Typically 3 to 4 weeks for mill finish, plus 1 week for machining, plus 1 week for anodising; large section may require a dedicated extrusion run
Loading Port	Shanghai, Ningbo, Qingdao
Supply Ability	Extrusion capacity for large-section wide beam profiles, with in-house anodising, machining and centre bore tapping
Payment Terms	T/T 30 per cent deposit, balance against copy of bill of lading; L/C at sight for larger orders
Trade Terms	FOB, CIF, CFR, EXW
Certifications	Mill certificate to EN 10204 3.1 on request, RoHS and REACH declarations

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01What is the 120 x 80 mm ten-slot wide beam?

Why would you need a section this large?

Because some frames need maximum stiffness in a single profile. The 120 x 80 ten-slot has a second moment of area of about 28 cm4 on the strong axis — roughly 5 times stiffer than the 40 x 40 four-slot at 5.8 cm4, and about 2.5 times stiffer than the 80 x 40 heavy six-slot at 11 cm4. It is the stiffest standard section in the 40 series range, designed for large machine bases and long-span structural members.

What is it used for?

Large CNC machine bases, multi-station assembly platforms, heavy conveyor support frames, portal frame uprights and crossbeams, and any application where a single beam must span 2 metres or more and carry significant weight. The 10 slots give fixing positions on every face for brackets, panels, sensors, cable chains and accessories.

How many slots and where?

Ten slots in total: three on each 120 mm long face and two on each 80 mm short face. This gives 10 fixing tracks across all four sides of the profile, with a slot pitch of 40 mm between centres. All slots use the standard 40 series 10.2 mm groove and 8 mm mouth for M8 fasteners.

How does it compare to bolted-together sections?

A common alternative is to bolt two 80 x 40 beams back-to-back to make a 80 x 80 section. That assembly weighs 7.2 kg/m and has I about 16 cm4. The single 120 x 80 ten-slot weighs 6.0 kg/m and has I about 28 cm4 on the strong axis. The single section is lighter and stiffer than the bolted assembly, and eliminates the alignment and bolting work.

02Section data

Item	Value	Note
Envelope	120 x 80 mm rectangular	1.5:1 aspect ratio
Slots	10	10.2 mm groove, 8 mm mouth
Slot layout	3+3+2+2	3 per long face, 2 per short face
Slot pitch	40 mm	centre-to-centre on all faces
Centre bore	Phi18 mm typically	for through-bolts or location
Wall	approx. 3.5 mm	heavy-wall standard for this size
Weight	approx. 6.00 kg/m	heaviest standard 40 series section
I strong axis	approx. 28.0 cm4	bending about the 80 mm width
I weak axis	approx. 11.0 cm4	bending about the 120 mm width
Alloy	6063-T5	EN AW-6063
Standard	EN 755-9 / GB/T 6892	wall tolerance +/-0.15 mm
Length	6 m stock	cut to drawing to +/-0.5 mm

The strong-axis stiffness of 28 cm4 is about 5 times that of the 40 x 40 four-slot. This makes the 120 x 80 the section of choice for long-span beams where deflection must be kept under 0.5 mm per metre at full load.

03Stiffness comparison across the 40 series range

The 120 x 80 ten-slot sits at the top of the 40 series stiffness range. Here is how it compares to the other standard sections, all on the strong axis:

Section	Weight (kg/m)	I strong (cm4)	Stiffness ratio
40 x 40 four-slot	1.49	5.8	1.0x
80 x 40 six-slot heavy	3.60	11.0	1.9x
120 x 80 ten-slot	6.00	28.0	4.8x

The stiffness ratio of 4.8 means that for the same span and load, the 120 x 80 beam deflects about 5 times less than the 40 x 40 beam. This is why large machine frames use the 120 x 80 for the main structural members and the 40 x 40 for secondary bracing and accessories.

04Ten-slot layout for multi-station platforms

The 10 slots are distributed across all four faces, giving fixing positions on every side of the profile. This is particularly useful for multi-station assembly platforms where tools, fixtures, sensors and cable chains must be mounted from different directions.

Face	Slots	Typical use on a platform beam
Top (120 mm)	3 slots	fixture stations, tool mounts, jigs
Bottom (120 mm)	3 slots	feet, levelling mounts, support brackets
Front (80 mm)	2 slots	cable chains, pneumatic lines, sensors
Back (80 mm)	2 slots	return cables, secondary mounting, panels

On a 6 metre platform beam, the three top slots give fixing positions every 40 mm along the full length. For a station spacing of 600 mm, each station has 15 fixing positions in the top face alone. The two front slots carry the cable chain and the sensor track, and the two back slots carry the return cables.

05Span design and deflection control

For a simply supported beam with a uniformly distributed load, the midspan deflection is proportional to the load, the span cubed, and the inverse of the second moment of area. With I = 28 cm4 on the strong axis, the deflection of a 2 metre span under a 500 N load is about 0.24 mm. For a 3 metre span under the same load, it is about 0.81 mm.

Span (mm)	Load (N)	Deflection strong axis (mm)	Deflection weak axis (mm)
1000	500	0.03	0.08
2000	500	0.24	0.61
3000	500	0.81	2.06
4000	500	1.92	4.88

These are elastic deflection estimates for a simply supported beam with a uniformly distributed load. Real frames with fixed ends and multiple supports will deflect less. Use these numbers for section comparison, not for final design.

06When to choose the 120 x 80 ten-slot

Choose the 120 x 80 ten-slot

You need maximum stiffness in a single profile
The beam must span 2 metres or more with controlled deflection
You are building a large machine base or multi-station platform
You need fixing positions on all four faces
A single section is preferred over bolted-together assemblies

Choose bolted-together smaller sections

The frame is modular and may need reconfiguration
Transport is a constraint: 120 x 80 at 6 m is 36 kg per bar
You need different stiffness in different directions
Cost per metre is the primary driver
The frame is light-duty and does not need the extra stiffness

The 120 x 80 is the top of the range for single-profile stiffness in the 40 series. For even larger frames, consider welded steel or bolted-together aluminium assemblies. For medium-duty frames, the 80 x 40 heavy six-slot is usually sufficient.

07Failure modes to design out

What goes wrong	Why it happens	Design it out by
Beam installed in weak-axis orientation	the 120 mm dimension is horizontal instead of vertical	mark the strong axis on the drawing and on the bar before installation
Excessive deflection on long spans	the span exceeds 3 metres without intermediate support	add a support post or use a bolted truss above the beam
Bolts loosen under vibration on heavy frame	M8 slot nuts can back out under cyclic loading	use spring-loaded slot nuts or thread-lock on all critical bolts
Profile is too heavy to handle safely	a 6 m bar weighs 36 kg and is awkward to move	cut to shorter lengths on receipt, or specify factory cut-to-size
Die line or surface defect on visible faces	the extrusion die is worn after a long production run	specify anodised finish to conceal minor surface defects

08What to check before you order

Procurement checklist for the 120 x 80 ten-slot beam

Confirm the section orientation: the 120 mm dimension is vertical for strong-axis bending. Mark it on the drawing.
Confirm the slot count: 10 slots total, 3 per 120 mm face and 2 per 80 mm face. All M8, 40 series.
Confirm the wall thickness: about 3.5 mm is standard for this section size.
Confirm the finish: mill for hidden structural use, anodised for exposed service. Anodising adds 10 to 15 micron.
Confirm the cut length and quantity. A 6 m bar weighs 36 kg; plan handling and storage accordingly.
Confirm the deflection requirement: specify the maximum allowable deflection at full load and the span.
Confirm the machining requirement: drilling, tapping, slot end milling for joints.
Any certification requirement: mill certificate to EN 10204 3.1.

09Terms used on this page

Wide beam: A rectangular section where the height is significantly larger than the width, giving high strong-axis stiffness. The 120 x 80 is the widest standard 40 series section.
Multi-station platform: A structural frame with multiple workstation positions along its length, each with independent fixing positions for tools and fixtures.
Portal frame: A structural frame with two uprights and a horizontal crossbeam. The 120 x 80 is used for both uprights and the crossbeam on large portals.
Stiffness ratio: The ratio of strong-axis to weak-axis second moment of area. For the 120 x 80, the ratio is about 2.5:1.
Through-bolt: A bolt that passes through the centre bore of the profile to connect two members end-to-end or to anchor the profile to a base.

10Questions buyers ask

What is the 120 x 80 ten-slot used for?

Large CNC machine bases, multi-station assembly platforms, heavy conveyor support frames, and portal frame crossbeams where maximum stiffness and fixing positions on all faces are needed.

How does it compare to two 80 x 40 beams bolted together?

The single 120 x 80 weighs 6.0 kg/m vs 7.2 kg/m for two 80 x 40 heavy beams, and has I of 28 cm4 vs about 16 cm4. The single section is lighter, stiffer, and eliminates alignment work.

What is the maximum recommended span?

For a 500 N uniformly distributed load with deflection under 1 mm, the strong-axis span can be up to about 3 metres. Add intermediate supports for longer spans.

Can I use standard 40 series accessories?

Yes. All 10 slots use the 10.2 mm groove and 8 mm mouth, so M8 slot nuts, T-bolts, cover strips and all 40 series accessories fit every slot.

What is the weight per metre?

Approximately 6.00 kg/m. A 6 m stock bar weighs about 36 kg; plan handling and storage accordingly.

Can it be anodised?

Yes. Clear, black, champagne and bronze at 10 to 15 micron. Recommended for exposed surfaces in machine frames.

What is the lead time?

Typically three to four weeks for mill finish, as this is a large section that may require a dedicated extrusion run. Cutting and drilling adds one week. Anodising adds one week.

What we need to quote this section

The section drawing or the profile reference GP-SP-80120-10S.
The cut length for each beam and the number of beams.
The orientation: confirm the 120 mm dimension is vertical for strong-axis bending.
The machining requirement: drilling, tapping, slot end milling.
The finish: mill, clear anodised, or a specified colour.
The deflection requirement: maximum allowable deflection at full load and the span.
The annual or per-order quantity, in metres or pieces.
Any certification requirement: mill certificate to EN 10204 3.1.

Send those eight items and the quotation comes back with the extrusion price, the machining charge, the finish surcharge and the lead time broken out separately. Browse the full aluminium profile catalogue and the 40 series aluminium profiles range for related sections.

Need this wide heavy beam quoted for your large-scale frame?

Send the section, the orientation, the machining requirement and the finish. We quote extrusion, machining and anodising as separate lines.

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