Hello,
we have built a prefabricated timber-framed house. On the upper floor (children’s room), the floor swings noticeably (currently without any floor covering, just screed). This was also confirmed by two experts. The construction manager provided us with the structural calculations, but we do not fully understand them. Is it possible that the structural design is sound, yet the vibrations are still this pronounced? I feel uneasy in the room when someone else is walking in it, and you can feel it when a truck passes by the house.
I would like to measure the vibrations myself. Is that possible? What kind of device should I use?
Best regards
we have built a prefabricated timber-framed house. On the upper floor (children’s room), the floor swings noticeably (currently without any floor covering, just screed). This was also confirmed by two experts. The construction manager provided us with the structural calculations, but we do not fully understand them. Is it possible that the structural design is sound, yet the vibrations are still this pronounced? I feel uneasy in the room when someone else is walking in it, and you can feel it when a truck passes by the house.
I would like to measure the vibrations myself. Is that possible? What kind of device should I use?
Best regards
S
Simon-18910 Jun 2024 06:53Hello,
Only the house manufacturer can confirm whether the calculated quality class was actually used.
I think you can ask them again and request a confirmation of the quality class.
The specification of a maximum deflection of L/200 is common throughout the construction industry, except for glass.
This means the profile length divided by 200 equals the maximum allowable deflection in the service condition, that is, when floors, furniture, and so on are already in place. Let’s assume one of the beams is 10.0m (32.8 feet) long (for example, the house width) and is supported in the middle by a load-bearing beam, resulting in a span length of 5.00m (16.4 feet). 5000mm (197 inches) divided by 200 equals a deflection of 25mm (1 inch).
Only the house manufacturer can confirm whether the calculated quality class was actually used.
I think you can ask them again and request a confirmation of the quality class.
The specification of a maximum deflection of L/200 is common throughout the construction industry, except for glass.
This means the profile length divided by 200 equals the maximum allowable deflection in the service condition, that is, when floors, furniture, and so on are already in place. Let’s assume one of the beams is 10.0m (32.8 feet) long (for example, the house width) and is supported in the middle by a load-bearing beam, resulting in a span length of 5.00m (16.4 feet). 5000mm (197 inches) divided by 200 equals a deflection of 25mm (1 inch).
B
Benutzer 100110 Jun 2024 07:28That’s why never again a prefabricated house.. when someone walks inside ours, it sounds like an elephant stomping..
Next house will be made of sand-lime bricks with a concrete ceiling at least 20cm (8 inches) thick.
Next house will be made of sand-lime bricks with a concrete ceiling at least 20cm (8 inches) thick.
Simon-189 schrieb:
a support span of 5.00m (16.4 feet). 5000mm / 200 = 25mm (1 inch) deflection. A deflection of 2.5cm (1 inch) is visible to the naked eye and is probably as realistic as the fuel consumption of 1 liter per 1000km (1 quart per 620 miles) that some car manufacturers cite as state of the art.
S
Simon-18911 Jun 2024 14:06Grundaus schrieb:
A deflection of 2.5cm (1 inch) can be seen with the naked eye and is probably as realistic as the fuel consumption of 1l/1000km (0.24 gal/621 mi) that some car manufacturers claim as state of the art.That is the maximum allowable deflection calculated and must not be exceeded. In practice, this — hopefully — will not occur. Otherwise, every water bottle would automatically roll toward the center of the room if it fell over. Not to mention marbles.
Moreover, in the structural analysis, the actual maximum deflection in centimeters should be specified for each individual element.