PG45 90×90 mm Eight Slot Heavy Aluminium Strut Profile for Heavy Machinery Frames

OEM / ODM Available Free Sample Available ISO 9001:2015 EN 755-9 RoHS REACH

A 90 x 90 mm eight slot heavy PG45 aluminium strut profile with thicker internal walls and M10 corner holes. For heavy machinery frames where the 90 mm envelope is fixed.

Wholesale Price $11.60 - $18.40 / m per m

Material	Aluminium
Alloy Grade	6063-T5
Temper	T5
Section Size	90 x 90 mm
Slot	8 x 10.2 mm groove, 10 mm mouth, 45 mm pitch, outer pair 45 mm apart
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	150
Lead Time	22-32 days after deposit for mill finish
Loading Port	Shanghai / Ningbo
Supply Ability	200 t per month
Payment Terms	T/T 30% deposit + 70% before shipment \| L/C at sight
Trade Terms	FOB \| CIF \| EXW
Certifications	ISO 9001:2015 \| EN 755-9 \| RoHS \| REACH

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Structural framing · PG45 heavy column

A PG45 90 x 90 mm eight slot heavy aluminium strut profile is the heavy-wall version of the 45 series 90 x 90 mm column. The envelope, the 45 mm slot pitch, the 10.2 mm groove, the 10 mm slot mouth and the 8 x 8 mm corner holes tapped M10 are all unchanged; what increases is the internal wall. It weighs about 9.0 kg/m against about 7.6 kg/m for the standard wall.

The reason to be cautious about this section is that the 45 series is already a thick-wall range. Its standard column has a 6 mm flange and a 13 mm web, against 4 mm and 11 mm on the 40 series, so a 45 series standard is closer to a 40 series heavy than to a 40 series standard. Adding the heavy version on top is therefore a second, smaller increment — and once you are paying 9 kg/m for a member, it is worth checking what the same weight would buy in a larger section.

90 x 90 heavy section: the same 45 mm pitch and 10 mm slot mouth as the standard wall, with a thicker internal web.

The second increment is smaller than the first

There are two ways to thicken a profile. The first is going from a thin standard wall to a heavy wall, which is a large change. The second is going from an already-thick wall to a heavier one, which is not. The 45 series standard sits in the second category before you even start, because its wall is already heavy for its size.

Range	Flange and web	Character
40 series standard	4 mm / 11 mm	The thin-wall baseline
40 series heavy	4 mm / 11 mm plus diamond cavities	The first increment, a large step
45 series standard	6 mm / 13 mm	Already thick — closer to a 40 series heavy
45 series heavy	6 mm / 13 mm plus thicker cavities	The second increment, a much smaller step

Look at the 45 series standard before ordering the heavy. Its 6 mm flange and 13 mm web already put it well above the 40 series in local strength. If you need the 45 series for its M10 joints, the standard wall may be all the member you need.

What the same weight buys in a larger section

This is the comparison that decides most enquiries, and it is worth doing explicitly. Take three options that all sit around 9 kg/m and compare the stiffness you get for that weight.

Option	Weight	Second moment of area	Stiffness per kg
90 x 90 mm standard wall	approx. 7.60 kg/m	approx. 230 cm4	30
90 x 90 mm heavy wall	approx. 9.00 kg/m	approx. 280 cm4	31
120 x 120 mm twelve slot	approx. 9.40 kg/m	approx. 600 cm4	64

The third row is the finding. For about the same weight as the 90 x 90 mm heavy section, the 120 x 120 mm column gives more than twice the stiffness. Wall thickness adds material close to the neutral axis, where it contributes comparatively little; a larger envelope puts material further from the neutral axis, where every square millimetre contributes far more. That is the whole reason depth beats thickness.

So the heavy 90 x 90 mm section is not a stiffness purchase at all. It is a local-strength and joint-durability purchase, and it is only the right answer when the 90 mm envelope cannot change.

Use the heavy version when the envelope is fixedInside a machine, behind a panel, or where a cover closes over the column. If the 90 x 90 mm space is all you have, this is the stiffest thing that fits.

Use the heavy version for local strength, not stiffnessBolted feet, jacking points, clamps and anchor plates load the section locally. That is where the extra wall actually does something.

Step up a section size when the envelope is freeIf there is room, a 120 x 120 mm column gives roughly twice the stiffness of this section for about the same weight. Depth is the cheap dimension.

Stay with the standard wall if the M10 joints are the reasonThe 45 series standard already has a 6 mm flange and a 13 mm web, which is plenty for the M10 corner holes. The heavy wall adds little to the joint.

Where the extra wall genuinely earns its keep

There are three situations where the heavy 45 series section is clearly the right answer rather than a marginal one.

The first is a heavily loaded bolted foot or base plate. A base plate transfers the whole column load into the section through a small area, and a thicker wall spreads that bearing stress over more material.

The second is repeated re-torquing. A heavier wall resists the local deformation at the slot lip and around the corner holes, so a joint that is opened and closed many times keeps its seat for longer.

The third is fatigue. A machine column that sees a reversing load benefits from a thicker wall because the local stress at the connections is lower, and in aluminium fatigue life is governed by local stress rather than by the average.

Choosing between the three options

Work out whether the problem is stiffness or local strength If the column deflects or twists too much, it is a stiffness problem and a larger section is the answer. If the connections deform, fret or loosen, it is a local strength problem and the heavy wall is the answer.
Check whether the envelope can grow If it can, price the larger section before ordering the heavy wall. At roughly the same weight, a 120 x 120 mm column gives about twice the stiffness.
Keep the M10 corner holes for the structural connections The 8 x 8 mm holes tapped M10 are the strongest fixing in the section. They are unchanged on the heavy version.
Torque to about 30 N m, not more The M10 slot ceiling is about 30 N m. A heavier wall does not raise it, because the limit is the slot lip.
Plan for the weight during installation At 9 kg/m a 45 series heavy column is a serious lift. On a site-built frame, check that the handling is practical before committing.

Frequently asked questions

Is the heavy version much stiffer than the standard 45 series?

About 22 per cent, at about 18 per cent more weight. That is a fair exchange but a small one, and a larger section will beat it easily if there is room.

What is the difference between the 45 series standard and a 40 series heavy?

The 45 series standard already has a 6 mm flange and a 13 mm web, which is thicker than any 40 series section. The 45 series is a heavier range from the start, and it also gives you M10 corner holes.

Should I use this or a 120 x 120 mm section?

If the space allows, the 120 x 120 mm section. It gives roughly twice the stiffness for about the same weight. This section is for when the 90 mm envelope is fixed.

Does the heavy wall let me torque the bolts more?

No. The slot torque ceiling is about 30 N m for an M10 in a 45 series groove, and a heavier wall does not change it because the limit is the slot lip.

Can you supply it machined?

Yes. We cut to length, face and square the ends, drill and tap the corner holes to M10 and the centre bore to M14, and supply end and base plates.

Send the column envelope and what is bolted to it

Tell us the available envelope, the load and what is bolted to the column. If the space can grow we will price a larger section as well, so you can compare stiffness per kilogram before you decide.

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