About 220 lb.
20,000 tons
It looks like that on average, fiberglass ladders hold 225-300 lbs, while metal ladders hold 300-500 lbs, so if you need a lot of weight capacity, I would go with the metal ladder.
When made out of cardboard? About ten kilos.
Depends on the structural integrity of the deck.
The weight limits of fiberglass ladders are variable. Most are capable of carrying somewhere between 200 to 300 pounds. However, one should check the manual of their specific ladder for the most accurate number.
A square foot of Plexiglas can hold no water. It is a flat sheet. A cube of Plexiglas would be needed.
The answer will depend on 4 inch slab of what material!
The weight of a ladder can vary depending on the material, size, and type of ladder. A typical 6-foot aluminum ladder can weigh around 15-20 pounds, while a heavier-duty 12-foot fiberglass ladder can weigh around 30-40 pounds.
That would depend on the specie of wood that the 2x8 is made from.
The maximum recommended weight for a normal loft ladder is 150 kg. Bear in mind that, as with any ladder, if you are carrying things up or down, the maximum weight includes any additional items and weight.
The weight a floor can hold depends on its construction and materials. Typically, residential floors can support around 40 pounds per square foot, while commercial floors can hold more, up to 100 pounds per square foot. It's important to consult a structural engineer for specific weight capacity calculations.
The weight that plexiglass can hold per square foot will depend on the thickness of the sheet. As a general reference, 1/8" thick plexiglass can typically hold up to 15 pounds per square foot, while 1/4" thick plexiglass can hold around 60 pounds per square foot. For greater load-bearing capacities, thicker plexiglass sheets or additional support structures may be needed.