Metal Walkway Load Tables

Fixed Span

CARBON STEEL
STYLE (Lb. Per Sq. Ft.)	SPAN
STYLE (Lb. Per Sq. Ft.)		24"	36"	48"
3	U D	275 .250	100 .220
3	C D	275 .250	165 .250	75 .250
3.14	U D	375 .250	150 .240	50 .250
3.14	C D	375 .250	155 .250	75 .250
4	U D	350 .240	150 .245	50 .250
4	C D	440 .250	220 .250	100 .250
4.27	U D	500 .245	165 .245	60 .250
4.27	C D	400 .250	225 .240	100 .250
5	U D	600 .240	175 .240	100 .250
5	C D	540 .245	310 .250	140 .250
6.25	U D	800 .220	300 .250	115 .240
6.25	C D	800 .220	300 .240	150 .240
7	U D	800 .210	400 .250	165 .240
7	C D	800 .220	350 .240	175 .250

ALUMINUM
2.0	C D	250 .250	100 .250	50 .250

STAINLESS STEEL
3.30	C D	–– ––	150 .197	50 .135
4.50	C D	300 .217	150 .192	100 .212

Free Span

CARBON STEEL

STYLE
(Lb. Per Sq. Ft.) SPAN

24" 36" 48"

3 C
     D 100
     .177 50
     .402 50
     .515

3.14 C
     D 200
     .255 100
     .583 50
     .275

4 C
     D 200
     .237 100
     .491 50
     .615

4.27 C
     D 200
     .223 100
     .217 50
     .330

5 C
     D 350
     .240 100
     .408 50
     .372

6.25 C
     D 400
     .249 100
     .247 50
     .270

7 C
     D 400
     .245 100
     .260 75
     .250

ALUMINUM

2 C
     D 150
     .231 50
     .257 ––
     ––

STAINLESS STEEL

3.30 C
     D 150
     .248 50
     .300 ––
     ––

4.50 C
     D 150
     .210 50
     .244 50
     .600

Catwalk Grating Selection Chart

CONCENTRATED
LOAD
(Lb. Per Foot of Length of
Catwalk or Platform)

CLEAR SPAN
(Distance between supports measured from
the inside edge of one support to the inside edge
of the next support)

23"

30"

35"

42"

47"

54"

60"

50 lbs.

Light or occasional
pedestrian traffic

3.00
3.14

4.00
4.27

5.00
6.25

100 lbs.

Normal or Frequent
pedestrian traffic

3.00
3.14

4.00
4.27

5.00
6.25

7.00

150 lbs.

Heavy or constant
pedestrian traffic

3.00
3.14

4.00
4.27

5.00
6.25

6.25

7.00

200 lbs.

Pedestrian traffic with
Light equipment

3.00
3.14

4.00
4.27

4.27
5.00

6.25

7.00

250 lbs.

4.00
4.27

5.00

5.00
6.25

7.00

300 lbs.

4.00
4.27

5.00
6.25

6.25

7.00

350 lbs.

4.00
4.27

6.25

7.00

The concentrated load deflections for the above selection chart do not exceed the 1/4" maximum deflection as stated by the federal Specification RR-G-661B and the generally accepted recommendations for normal pedestrian comfort.