Problem with roof concept

[MrtnBuilder]

1 hour ago, JiAngelo said:

Aby zachować nachylenie 7/12 (30 stopni)

I nie przekraczaj 950 cm, zgodnie z Twoimi uprawnieniami

Zmień wysokość pierwszego piętra na 285 cm, netto 265 cm po podwieszeniu sufitu dla posłów do PE.

Zmień wysokość drugiego piętra na 265 cm i przenieś instalacje MEP na poddasze.

Powinno to doprowadzić Cię do wejścia na grzbiet na wysokości 947,6 cm.

Powinieneś mieć wystarczająco dużo miejsca, aby stworzyć izolowane pomieszczenie na poddaszu o szerokości 430 cm i wysokości 250 cm w dachu czterospadowym.

Pomieszczenie na poddaszu może rozciągać się na całą długość dachu dwuspadowego i mieć okna na obu końcach.

Jeśli chcesz, pomieszczenie attc może mieć tylko 125 cm wysokości, jak na rysunku poniżej (na podstawie budynku, który narysowałem dla innego klienta) 

 

Albo tak, przy 250 cm, wygląda to w innym projekcie, nad którym obecnie pracujemy.

 

Osobiście wybrałbym powyższe rozwiązanie, aby wyeliminować potrzebę płaskich powierzchni dachowych. Strych musi być wystarczająco duży, aby pomieścić sprzęt i zapewnić do niego dostęp – to również pozwoliłoby zaoszczędzić pieniądze. 

 

I was thinking about a solution: a truss ceiling or something similar on the ground floor, which would allow for MEP installations to be carried without lowering the ceiling by as much as 20 centimeters.

 

The problem, unfortunately, is the span of the rooms, which requires supporting beams, which unfortunately have large cross-sections and require the construction of a structure, drastically increasing the height of the rooms.

 

If I could eliminate the need for additional beams supporting the ceiling, perhaps I could keep within the building's height.

 

On the first floor, the solution is more complicated because I can't move the MEP installations to the attic.

 

The city's administrative decision only allows for two full floors, so with this assumption, it's impossible to have an attic above the second floor.

 

The situation is further complicated because the city requires a wide roof overhang. At a height of 265 centimeters, the eaves on the second floor are so long that they overlap the windows.

[JiAngelo]

An attic room isn't a 3rd story.  It is inside the required roof pitches and your use is non-habitable, for mechanical equipment only.  City will allow this use.

 

Exactly what are your overhangs required to be?

 

Spanning the entire 1186cm likely will require a 60cm floor truss system.  Send out the plans and find out.

 

 

[MrtnBuilder]

1 hour ago, JiAngelo said:

An attic room isn't a 3rd story.  It is inside the required roof pitches and your use is non-habitable, for mechanical equipment only.  City will allow this use.

 

Exactly what are your overhangs required to be?

 

Spanning the entire 1186cm likely will require a 60cm floor truss system.  Send out the plans and find out.

 

 

 

Regarding the truss system, if it would help the building's height, it might be worth considering.

 

Placing the trusses closer together might allow for the elimination of some of the beams supporting the ceiling, but wouldn't that drastically increase the budget?

 

Regarding the roof overhang, the building authorities have planned for a 100 centimeter overhang.

project.pdf

Edited 2 hours ago by MrtnBuilder

[MrtnBuilder]

After analyzing the height and the required eaves, it turns out that the first floor must be at least 300 centimeters high so that the straight eaves don't overlap the 220-centimeter-high window.

 

A straight eave is created by extending the truss beyond the face of the wall. In this case, this is not possible because it further increases the building's height.

 

Assuming the eaves extend from the truss rafter, we need to lower the rafter by over 60 cm to achieve a straight eave of 100 centimeters. This, assuming the windows are 220 centimeters high, creates a room over 280 centimeters high without any floor finishes.

 

In this situation, constructing a truss ceiling won't help either.

 

The only solution that might help is a multi-pitched roof consisting of several hipped roofs.

 

A flat roof is also possible, but I want to avoid this due to the cost and complexity of the structure.

 

The roof eaves can be created by extending the lower chord of the truss in front of the wall by a specific length, but this is only possible in this situation if the roof can be created by combining several hipped roofs into one, as this will allow for additional height to extend the eaves in a straight line.

Edited 2 hours ago by MrtnBuilder