Light steel is also a relatively vague term, and generally can have two understandings. One is the eleventh chapter of the current "Code for Design of Steel Structures" (GBJ 17-88) "Light steel structure of round steel and small angle steel", which means round steel and less than L45×4 and L56×36×4. The light steel structure made of angle steel is mainly used for small structures that are not suitable for reinforced concrete structures when the steel is lacking. It has been basically not used, so this steel structure design specification has basically been removed. The other is a single-layer solid belly-type rigid frame structure with a light roof and a light exterior wall (which can also be conditionally used for external walls) as stipulated in the Technical Specification for Steel Structures for Lightweight Houses of Portal Frames. The light weight here mainly means that the enclosure is made of lightweight materials. Since the former one has been canceled quickly, the current light steel meaning mainly refers to the latter. In addition, there are some reference values: such as the cost per square meter, the maximum component weight, the maximum span, the structural form, the high height, etc. These can provide empirical data when judging whether the plant is heavy steel or light steel. Of course, many buildings are now Light and heavy steel are available. National norms and technical documents are not related to heavy steel. In order to distinguish the steel structure of light-duty houses, it may be more appropriate to call the general steel structure “Pugangâ€. Because of the wide range of ordinary steel structures, it can contain a variety of steel structures, regardless of the size of the load, and even the light steel structure, the light steel structure technical regulations only specify some more specific for its "light" characteristics. Content, and the scope is limited to single-story portal frames. It can be seen that the distinction between light steel and heavy steel is not the weight of the structure itself, but the weight of the enclosing material is still consistent with the structural design concept.
"Steel Structure Design Code" GBJ17-88 has been abolished since December 1, 2003. Currently, the "Code for Design of Steel Structures" GB50017-2003 is implemented.
Unshielded twisted pair (UTP) cat 5e cable, 500ft in easy pull box. It is ideal for high-end solutions such as Gigabit Ethernet, or digital CCTV cameras installation utilizing Cat 5e-type cable. This cable consists of 4 unshielded pairs of 24 AWG solid bare copper conductors, white PVC jacket. Stable electrical performance to 350MHz, exceeds requirements of TIA/EIA-568-B and ISO/IEC 11801. CMR riser rated.
Num:
ID-CA5F-PVC/LSZH
Item:
Cat5e 4-pair FTP LAN cable roll 305 mtrs
Brand:
Idex
Conductor :
Solid bare Copper
AWG :
24
Conductor Diameter (mm) :
0.51
Insulation :
Foam – skin PE
Average thickness(±0.03 mm) :
0.22
Min point thickness :
0.18
Insulation Dia(±0.03 mm) :
1.02
Twisting lay length(mm) :
30 undemeath
Twisting lay length(mm) :
200 undemeath
Jacket :
PVC/LSZH
Average thickness :
0.5
Min point thickness :
0.43
Outer Dia(±1.00 mm) :
6.0
Rip cord :
Yes
Weight Nom(kg/km) :
42
Core color:
Pair 1 :
Blue-White/blue
Pair 2 :
Orange-White/orange
Pair 3 :
Green-White/orange
100Mbps TP-PMD.52/155 Mbps ATM (ATM forum);
100BAST-T4 (fast Ethernet);
100 VG-Any LAN (IEEE 802.12);
100BAST-T (fast Ethernet);
1 Gbps Ethernet (IEEE 802.3).
CENELEC EN 61156-6;
CENELEC EN 50173-1;
CENELEC EN 50288-5-1, CENELEC EN 50288-5-2;
Flame retardancy is verified according to IEC 60332-1-2.
Pair 4 :
Brown- White/brown
Cable Applications :
POTS.T1&T1 fractional, ISDN basic & primary rate;
4/16 Mbps token ring (IEEE 802.5).10 BAST-T (IEEE 802.5);
Standard compliances :
All proposed category 6 requirements as per ANSI/TIA/EIA, ISO/IEC, and CENELEC EN Standards;
ANSI/TIA/EIA 568-B.2-1 CAT 6;
ISO/IEC 11801 CLASS E 2nd Edition;
Network Wire,Network Cable,Aluminum Network Wire,Network Wire For Cctv Camera
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