AAC (aka Aircrete, Thermalite) wall + IKEA ALGOT shelf weight load capacity

I got some IKEA Algot shelves tall uprights. The PDF manual can be found here.

The installation instructions say:

Hang the wall uprights from the mounting rail, correctly space them and then secure them to the wall. Use roundheaded screws with a 4–4.5 mm diameter (screw head max. 9 mm). You will need:

• 3 screws for the 56 cm (22″)
• 4 screws for the 84 cm (33⅛″)
• 8 screws for the 196 cm (77⅛″) high wall upright.

And these are the weight ratings per shelf:

40 cm (15¾″) width

• 38 cm (15”) depth 15 kg (33 lbs)
• 58 cm (22⅞”) depth 23 kg (50 lbs)

60 cm (23⅝”) width

• 38 cm (15″) depth 22 kg (49 lbs)
• 58 cm (22⅞”) depth 34 kg (75 lbs)

80 cm (31½”) width

• 38 cm (15″) depth 30 kg (66 lbs)
• 58 cm (22⅞”) depth 46 kg (101 lbs)

I live in a block built with beams so inner walls are not structural. All internal walls are 10cm AAC (autoclaved aerated concrete aka aircrete or thermalite). How does one estimate the load capacity of a shelf and also multiple shelves put on 2 uprights or 2 sets of shelves put on 3 uprights? Is there a way to calculate an estimated weight support.

I’ll use AAC Wall Plugs (1st) or universal Fischer Duopower (2nd).

So we have:

• 10cm AAC 2.5m tall wall
• wall plugs 4mm diam, 30-50mm deep (I assume this affects load capacity)
• uprights with 8 screws (196cm)
• 2 uprights with a 6 shelf max (16 plugs)
• 3 uprights with a 12 shelf max (24 plugs)
• 60cm spacing between uprights (shelf size)
• shelf weight capacity is available above

Is there any way to factor this in and get some load capacity estimates? I want to put some books on some shelves and they’re not eBooks. 🙂