粗壮挺进邻居人妻,夜夜躁狠狠躁日日躁2022,久久综合九色综合欧洲98,免费又粗又硬进去好爽A片视频

A Brief Analysis of General Knowledge of Steel Structures

Characteristics of Steel Structures

1、 Lightweight and high-strength

Q235 steel density: 7850kg/m ³

Strength: 215N/m ²

C30 concrete density: 2450kg/m ³

Strength: 14.3N/m2

Lightweight - the ratio of mass density to strength of a material ρ/ F small

Q235 steel ρ/ F=1.7-3.7x10-4/m

C30 concrete ρ/ F=17x10-4/m

2、 Good plasticity and durability

Reflection on the Wenchuan earthquake damage: Steel structure buildings have good ductility and strong integrity, excellent seismic performance, and rarely experience overall damage or collapse during earthquakes.

3、 Convenient manufacturing and short construction cycle

Prefabrication of components in the factory, with short construction cycle

4、 Good heat resistance, poor fire resistance

5、 Poor corrosion resistance

6、 Low temperature cold brittleness tendency

Metal curtain wall panel, color steel rock wool sandwich panel, polyurethane color steel plate, polyurethane sandwich panel, polyurethane wall panel, polyurethane roof panel, polyurethane rock wool sandwich panel, polyurethane glass wool panel, polyurethane edge sealing rock wool sandwich panel, polyurethane edge sealing glass wool panel, polyurethane board, polyurethane PU board