Children's Wardrobes

The board could consist of a single bed, the child's wardrobe and a computer table

No!

Because of the expense when they built the house they have calculated the minimum size to be made between the ceiling joists. Even walking on the ceiling joists may crack. When you add a floor, bed, furniture and yourself and perhaps others, you will see they will not be sufficient. DIY manuals are often guides loft conversion, so it's worth a search on. Your local building inspector will also advise. They are especially useful in this regard. This is the twits that bodge job they hate.

Everything depends on the length of the joists and the spacing from center to center.

Generally I would say no because you do not design additional living space based on immediate needs, but rather a possible future use. When the child is grown, or more simply, the needs may change, therefore a greater burden would be placed on the joists. Perhaps that space would become a library book or a space lined with more than casual furniture.

The best advice,,, do research based on local building codes. Generally, in the broadest terms, 2x8 or 2x10 as required in living spaces.

You said loft, no attic. The size of a planed two by six is 5 3 / 4 by 1 1 / 12 So if the 2x6 is a minimum of twenty-four inch centers, do not cover more than eight feet and the floor and groove tongue or half-inch plywood, although I do not recommend a waterbed, you'll be fine. several stories have no more than two by six beams.

The calculator below will give you the maximum allowed for some companies joists. It appears that you have 2x6, but you did not specify how far east (spacing), which is usually either 16 "or 24". Most likely, the wood is SPF (spruce-pine - fir). For 2x6 SPF 16 "spacing maximum range is about 9'6".

Seems that no one gives you the answer you need. Well sit down. For all the times of British rule of thumb has always been "Half span plus two" Now, what has worked for the power tools were invented and make your request .... Let me explain.If a range of joist is required from wall to wall 10 feet and then say you call it 10 inches divide by 2 if you have five inches, then 2 more is 2inches, get it. So is 12ft 6 inches span of two decisions 8. So, generally for domestic applications deep joist would follow the same rules. All these amounts are 50mm thickness of timber. If in doubt go to the 65mm thick joist or closer spacing turn, but any above dimensions are 16 "centers or 450mm. Jeff

OK, I'll go out on a limb here and say that 2 x 6 "S can be used legally for a period of 6 '. I have no problem doubling the 2 x 6, so in effect you have 4 x 6 beams, and I think you could double that distance to 12. Triple these beams, and you could go to 18 '. I think that would meet code and be safe.

If your roof is supported on outages as in most traditional roofs and hanging from the ends of the span of these should be allowed, 5 3 / 4 x 6 / 4 is strong enough. if in doubt get a quote from a professional.

those 2x6s if they are under 6 'span they will support a room. If they are over 6 'long, you can run a beam under the least every 6 feet, the beam must be 1 inch per foot of length, 4x4 4' 4x8 8 'etc.

In no case are they strong enough all you need do is add 2x10 to the sides of the 2x6 and make sure the ends are supported by walls or beams on both ends

No you get a carpenter to come through the ceiling, you don `t have to remove the beams, but to dig them by browsing.

joists or trusses? any way. but ......... your re-election.