damo74, it depends on the special case. have you an sketch ? in general it is possible to judge the stiffness
of an timber roof. it may be not the best solution, considering the in plane deflections.
i sure did it in steel structures with braced roof planes.
to better understanding, do a sketch
in general we have to design an non-kinematic system.
in your case there are several ways to satisfy this:
1. if the roof has shear-stiffness, then it distributes
the forces to the 3 remaining wall.
2. if the roof has not enough shear-stiffness (as usual in steel-structures) you may...
hi,
are the long sides free edges ? what about the opening ?
in general, flared edges have in this case an very little
effect because the main trajectories of the moments are not changed, they dont spread !
hi,
i have a report in german exactly about that problem.
there are 2 possible states of equilibrium for uplift:
1. if the anchors are not pretensed an long enough, the anchors bow in the direction of the resulting force-vector
2. if the anchors are strongly pretensed, they belong straight...
it has nothing to to with the number of bolts.
the column is not infinite small.
so when there is an pressure force and a base plate
there is an resisting moment at the base of the column....
hi,
this is an construction quite common.
the portal frame gets the horizontal load at the
height of its rafter
this means that for global analysis you just connect the
portal frame at that point to the other structure
the other connections at the column are to avoid
problems of stability...
amir,
start with a simple model, for example two rectangulars
braced by crossed tension diagonals.
elevate the middle-line so that there is an high slope roof and calculate the forces.
every force in the diagonals can converted in shear-forces.
calculate the displacements and decide if the...
hi lutfi,
i agree.
at first, every engineer has to decide for himself if he
want to to his job right or not.
there is always someone, who offers the same job for less money.
if you do an job properly for less money, you just lose some dollars.
if you systematically underdesign, chances...
amir,
if there are clients seek these under-designing engineers, they will find someone who does it.
its like people who like to drive without brakes, you can
try to explain themselves the risks but you cannot stop
them.
thanks god, my clients want economic and save designs,
and not an...
hi amir,
i work also as an structural engineer and we have also a
hard competition resulting in very light steel structures.
so the structural engineer is fully responsible for the
correctness of his calculation or design.
for example if there is severe damage to people or buildings, the...
hi,
i had that case several times.
top flange beam no.1 is supported by the top flange
of beam no.2. you calculate the moment by using the
formulas of an beam with discrete elastic foundations.
these foundations are the ties.
the reaction forces are the loads for beam no.2.
the moments are...
