by Technological requirements for prefabricated parts technologyofcablepenetration1 and cable penetration cabletransit.
If there is no special indication in the tray table, the material of the penetration is ordinary grade a steel.
After the penetration is made, the sharp edges and burrs shall be polished, and anti-corrosion treatment shall be carried out.
Generally, it shall be coated with two layers of antirust primer.
Thematerialofpenetrationisordinarysteel(classA)ingenerally,ifnospecify.
Thetransitshouldbegrinded,andcoatingtwolayers.
Common cable penetration (without fire prevention and watertight requirements) is shown in the following figure 1 ordinarytransit (no fire proof no watertight) seedrawing1 1.1 representation of horizontalordinarytransit of ordinary cable frame express: DKL × B × H ×δ DK — ordinary cable frame horizontalordinarytransit1 2.
See Figure 1 below for ordinary cable drum (without fire prevention and water tightness requirements).
Verticalordinarytransit(no-fireproofno-watertight)seedrawing1.
Express: DTL × B × H ×δ DT — ordinary cable drum vertical ordinarytransitl – length B – width H – height high δ— The small ordinary cable frame and barrel with thickness can be pressed with galvanized pipe instead.
Miniordinarytransitscanbetakenplacedbypressedgalvanizedtube.
1.3 fire proof cable frame express: awnl × B × two hundred and fifty ×δ Aw — fire proof cable frame fire proof horizontal transit L – length B – width h eight — 250mm δ— Plate thickness thicknessn – see the following table for the fire resistance rating.
The height of seefollowable cable frame is fixed as theisfixed: 250mm type parameter type name fire resistance rating fireproofinggrade site aw1dmt-w watertight grade A-60 fire resistant cable frame dmt-wwatertightgrade A-60 fire proofingtransita-60, A-30, A-15 bulkhead bulkhead aw3dmt-w watertight class A-0 fire-resistant cable frame dmt-wwatertightgrade a-0fireproofingtransita-0 bulkhead bulkhead mark example signature: awn — type serial number fire proofgrade (the filling hole and vent hole are on both sides of the bulkhead) the specific requirements are shown in Figure 2: generally, the fire-resistant cable frame shown in Figure 2 is selected.
Double sided fire-resistant cable frame (perfectionholeandventilateholeintwosides), see: drawing2: internally, thisindoffire prooftransitville prioritized (seedrawing2), FIG.
2aw1, 3.
In order to ensure the necessary bending radius of the cable, in some special areas, the single-sided fire-resistant cable frame as shown in Fig.
3 can be selected (the filling hole and vent hole are on the same side of the bulkhead)..
