It is this kind of steel that the construction work site needs most urgently.
It is these drawbacks which need to be eliminated and which have led to the search for new methods of construction.
It is not until the stiff concrete can be placed and vibrated properly to obtain the designed strength in the field that high permissible compressive stress in concrete can be utilized.
The main problem in the design of the foundation of a multi-storey building under while the soil settles is to keep the total settlement of the building within reasonable limits, but specially to see that the relative settlement from one column to the next is not great.
Anything that can be done to reduce congestion and allow people to travel to the town center in a shorter time, will make the central area more accessible and, thus, will help people to decide to shop there as against in the suburbs or out of town.
In the course of designing a structure, you have to take into consideration what kind of load structure will be subjected to, where on the structure the said load will do, what is expected and whether the load on the structure is applied suddenly or gradually.
It is most important that the specifications should describe every construction item which enters into the contract, the materials to be used and the tests must meet, methods of constructions in particular situations, the method of measurement of each item and the basis on which payment should be calculated.
对于合同所列的各项施工项目、需要的材料及其检验要求、具体条件下的施工方法、 每个施工项目的验收方法以及付款计算的依据等，说明书都应加以详细说明，这一点是 十分重要的。
Pre-tensioning is a method of prestressing in which the steel tendons are tensioned before the concrete has been placed in the moulds.
A drainage blanket is a layer of material that has a very high coefficient of permeability.
In the design of concrete structures, an engineer can specify the type of material that he will use.