FLOORING
MB’s PRODUCT CODE
FORGEWELD STEEL GRATING
TABLE OF LOADS AND DEFLECTIONS
LOAD BAR PITCH : 30 MM
THE WEIGHT OF FABRICATED GRATING INCREASE DUE TO ADDITION OF FITTINGS, ATTACHMENTS AND TREATMENT EG. BANDING AND GALVANIZING INCREASE THE WEIGHT BY APPROXIMATELY 12%.
NOTE :
Spans to the left of the heavy line have a deflection of less than 5 mm for a 4 kPa uniformly distributed load, which is a limiting deflection for pedestrian comfort.
LOAD TABLE DATA
  • U = Safe Superimposed uniformly distributed load in Kilopascals.
  • D = Deflection in millimeters.
  • Mass calculated with grating in an untreated condition.
  • Load calculated in accordance with an allowable bending stress 171.6 MPa (0.66 Fy).
  • Load bar are assumed simply supported and unserrated steel with Fy – 260 MPa.
PLAIN – 30 X 100 mm Pitch
SERRATED – 30 X 100 mm Pitch
PLAIN – 30 X 50 mm Pitch
SERRATED – 30 X 50 mm Pitch
NOMINAL O/A DIMENSION OF BARS (in mm)
NOTE :
– For 3 mm Load Bar subtract 2 mm from width.
– Width dimension can vary due to manufacturing process.
SERRATED CONVERSION FACTORS
FORGEWELD STEEL GRATING
TABLE OF LOADS AND DEFLECTIONS

LOAD BAR PITCH : 40 MM

THE WEIGHT OF FABRICATED GRATING INCREASE DUE TO ADDITION OF FITTINGS, ATTACHMENTS AND TREATMENT EG. BANDING AND GALVANIZING INCREASE THE WEIGHT BY APPROXIMATELY 14%.
NOTE :

Spans to the left of the heavy line have a deflection of less than 5 mm for a 4 kPa uniformly distributed load, which is a limiting deflection for pedestrian comfort.

LOAD TABLE DATA
  • U = Safe Superimposed uniformly distributed load in Kilopascals.
  • D = Deflection in millimeters.
  • Mass calculated with grating in an untreated condition.
  • Load calculated in accordance with an allowable bending stress 171.6 MPa (0.66 Fy).
  • Load bar are assumed simply supported and unserrated steel with Fy – 260 MPa.
PLAIN – 40 X 100 mm Pitch
SERRATED – 40 X 100 mm Pitch
PLAIN – 40 X 50 mm Pitch
SERRATED – 40 X 50 mm Pitch
NOMINAL O/A DIMENSION OF BARS (in mm)
NOTE :
– For 3 mm Load Bar subtract 2 mm from width.
– Width dimension can vary due to manufacturing process.
SERRATED CONVERSION FACTORS
FORGEWELD STEEL GRATING
TABLE OF LOADS AND DEFLECTIONS

LOAD BAR PITCH : 60 MM

THE WEIGHT OF FABRICATED GRATING INCREASE DUE TO ADDITION OF FITTINGS, ATTACHMENTS AND TREATMENT EG. BANDING AND GALVANIZING INCREASE THE WEIGHT BY APPROXIMATELY 16%.
NOTE :
Spans to the left of the heavy line have a deflection of less than 5 mm for a 4 kPa uniformly distributed load, which is a limiting deflection for pedestrian comfort.
LOAD TABLE DATA
  • U = Safe Superimposed uniformly distributed load in Kilopascals.
  • D = Deflection in millimeters.
  • Mass calculated with grating in an untreated condition.
  • Load calculated in accordance with an allowable bending stress 171.6 MPa (0.66 Fy).
  • Load bar are assumed simply supported and unserrated steel with Fy – 260 MPa.
PLAIN – 60 X 50 mm Pitch
SERRATED – 60 X 50 mm Pitch
NOMINAL O/A DIMENSION OF BARS (in mm)
NOTE :
– For 3 mm Load Bar subtract 2 mm from width.
– Width dimension can vary due to manufacturing process.
SERRATED CONVERSION FACTORS
FLOORING ACCESSORIES (FIXING CLIP / FASTENER)
All gratings are to be firmly fastened to their supports by positive means, there are some methods to fasten the grating to its support, i.e:
1. Welded Fastened (in field by others)
Recommended for all permanently installed gratings.
2. Saddle Top & Bottom Clips, Bolt & Nut (Complete Set)
This Type of Grating Clip is suitable to be used for removable area where have no vibration.

The MB complete set of grating clips consist of :

  • Top Clip, available in “M” & “Universal” Type
  • Bottom Clip and
  • Slotted Round Head Bolt & Nut M8, available in :
– M8 x 60 mmL for grating height < 50 mm
– M8 x 75 mm L for grating height >= 50 mm
Our grating clip is designed to secure the grating to the supporting steel structure. And can be done quickly and safely by a man using only a screwdriver, working from the floor surface.

Grating Clip Installation Procedures :

a. Assembly the Clip/Fastener as shown in Figure A
b. Pass Bottom Clip between Load Bars, allowing Top Clip to position over load bars.
c. Using Screwdriver, locate Bottom Clip under flange of supporting beam.
d. Lift Top Clip until the Nus locates in Bottom Clip and shoulders of Bottom Clip engage the load bar.
e. Thighten the Bolt with Screwdriver until Top and Bottom Clip secure grating to supporting beam as shown below.
For 30mm LB Pitch
For 40mm LB Pitch
For 60mm LB Pitch
For Adjacent Panel use Universal Top Clip as shown :
3. Welded with Saddle Top Type
This Type of Grating Clip is suitable to be used for removable area where have no vibration, where Bottom Clip cannot be used.
ESTIMATED QTY OF REQUIRED CLIP

PART OF CLIP

TOP “M” TYPE
TOP “UNIVERSAL” TYPE
BOTTOM STANDARD TYPE
ROUND HEAD BOLT & NUT M8
PT. MULIA BERSAUDARA
Kawasan Industri Jababeka 1, Jl. Jababeka IIA Blok C11F, Cikarang, Bekasi – Indonesia
Phone : 62-21-8983 3902, Fax : 62-21-8983 3903,
email : mulia.bersaudara@mb-grating.com
website : www.mb-grating.com