أنشئ حسابًا أو سجّل الدخول للانضمام إلى مجتمعك المهني.
Though the Ques. relates to Civil Design however, as per our observation in construction field, I would go for Option "A" /10 Meters.
Thanks En.Alex
choose "20-30" as usual in my country...
(A) is the nearest answer, but some detailing is important :
If the wall is veneer (without reinforcement) then the length will be from7-10 m for clay brick and5-7 m for concrete brick
If the wall is reinforced the expansion joint will be applied every15 m.
Expansion joints in masonry walls are provided if length exceeds "40 m". So choice "D" is the correct answer
I think that there was missing data
For boundary walls wich built from brick , the suitable joint length15 m , and for partitions or bearing walls the suitable joint length (30-45 m)
We must not forget the Differing standards between countries due to differences in climate and the contrast in temperatures.
Expansion joints in masonry walls are provided when length exceeds 40 m.
D.40 m.
Expansion joint will act as a resultant effect for every A) 10 meters
Expansion joints are provided in the masonary walls when length of the wall exceeds20 to25 meter.
Sorry I always have more questions about a question, but depending on windows, doors and other boundaries it can be6 or7 meters, for large walls it can be30 to40 meters. So no straight answer, depending on the design,