Robust DYI shelf for water storage, am I thinking right?

[Tinototem]

In the world we live in, I decided to seriously tackle water storage and I think I have found an optimal place to store it. I need to build a robust shelf capable of holding over 150 kg for my 120 liters of water.

The location is above the door to a pantry (see picture), with a ceiling height of 270 cm. Above the door, I am planning a shelf from wall to wall with a width of 170 cm and the shelf being 40 cm deep. On the shelf, I will store 6 20-liter water containers for a total of 120 liters, which should be enough for just over a week for a family of 4.

I am planning the shelf to consist of the following parts

• Pine shelf, 210 x 40 x 2.7 cm which will be cut and painted white
• 3 'Duty' Bracket 300x400 250 kg White, one bracket to the left of the door, one to the right of the door, and one near the wall to the right.
• Habo Countertop Bracket

Since there is a bracket on each side of the door, I'm worried the span might be too much, and I'm considering some alternative to secure it, like the Countertop Bracket or some support strip. I gratefully welcome any tips here.

The wall has OSB, but I'm planning to check with a stud finder to see if I can find any studs to screw into. There should be a stud to the left and right of the door, right?

I feel like this should be stable and good, but at the same time, you don't want this to fall down.

 

[fribygg]

How do you plan to handle/rotate the dunkers at that height?

 

[Tinototem]

How do you plan to handle/rotate the jugs at that height?

I'm thinking of using a ladder, I'll go up and lift them down, and then my wife will take them. This is done 1-2 times a year. Perhaps not the most convenient, but we wish to use the more accessible space for something else.

 

[fribygg]

Place the containers lower (preferably at floor level in a cool room with a floor drain) or install some sort of tank that you can drain and fill without taking it down. I think a hydropress or hydrofor with appropriate water connections would be significantly more convenient.