Cement life 50 years, this is to show the life of this kind of material is considering cement the life below all sorts of complex environments, not be equal to the life that says a room is 50 years. Because the room is not made by cement completely, cement just builds a kind of housing materials that the room uses.
The life of the room that we say at ordinary times is design life commonly, be not use fixed number of year actually what point to a house, at the beginning of saying the house is being designed however, considering all sorts of harships, local geological situation, below normal use condition, theoretic do not have a problem 50 years, because can have the natural factor that cannot predict, natural disaster, it is a design commonly so when, life wants ambitious at 50 years, economy is built in integrated consideration, should not produce weather of earthquake, extreme only (acid rain) wait for the word that is not normal element, do not have a problem 50 years.
The house of every area has aseismatic level, different area is aseismatic the design is different, resemble record of history of reference of a few places, join geological case, the design is aseismatic 7 class, happened to compare design tower above below extreme circumstance the earthquake of several archives, this kind of circumstance exceeds aseismatic design already, the house collapses, house life ends. So house life just designs academic fixed number of year, it is a building only the design is standard, be not that is to say to design 50 years, can use 50 years actually only, no matter what produce,perhaps must use.
Be in even if residential building property right is the land operating period that point to 70 years it is 70 years, the house is the adjunct above land, these two time does not have conflict, also did not concern necessarily. Assume your house expires after 50 years so cannot use, need is demolished or reparative, OK, you are new and reconstructive a building that designs life 50 years, after the branch approves your construction to finish related the government, can continue to use property right to expire, should not need to be in gold of pay land sell one's own things, unless be land ask forring,tear open, go up afresh platform action is patted hang, that is belonged to tear open change, not be to rebuild.
After 70 years property right expires, the house is personal property, land is we make gold of land sell one's own things to the country, acquisition access, after land access expires, current practice is to continue to use, whether pay land uses fee, or gold of land sell one's own things, return the regulation with unified neither one at present.
The use property right that is land 70 years no matter so expires, or house life of 50 years expires, need not worry, because this time still is longer. Present ferroconcrete house, use normally commonly safeguard, do not suffer special situation damage, 70 years of questions are not big.
Cement life 50 years 50 years the house designs ≠ house life 50 years ≠ house uses life actually 50 years
