FRP Moulded Gratings

FIBERA COMPOSITES FRP Moulded gratings are available in multiple panel size and various colours. FIBERA gratings are used in various application e.g. Trench covers, Walkways, Fencing, Maintenance duct covers, Platform. Strom drain application etc.

Technical Data Sheet

Specification	Details
Rib Thickness	5 to 7 mm
Height	25, 30, 38, 40 mm
Pitch	38 x 38 mm
Panel Size	1220 x 3660 mm
MOC (Material)	Glass Fibre E-glass, Polymers

Length	Width	Height	Pitch	Weight	Panel Weight
1220 mm	3660 mm	25 mm	38 * 38 mm	12.5 kg/m²	55.81 kg/m²
1220 mm	3660 mm	30 mm	38 * 38 mm	14.5 kg/m²	64.74 kg/m²
1220 mm	3660 mm	38 mm	38 * 38 mm	18.5 kg/m²	82.60 kg/m²

Tolerance	Length	Width	Height	Weight
	+1/-4 mm	+1/-4 mm	+2/-2 mm	+10/-10%

Content	Resin	Approx. 68%
	Glass Fibre	Approx. 32%

Further Indications:

FRP Gratings are UV resistant.
Fire Classification B2 (normal ignition acc. to DIN4102 part 1).
The FRP Gratings have a resistance of conductive discharge of $1.098 \times 10^9$ ohm x mm².
Gratings can also be provided with anti-skid surface

SIZE TABLE

Width Length

Holes	Width	Holes	Length	Holes	Length	Holes	Length
1	43	1	44	33	1261	65	2480
2	82	2	82	34	1299	66	2518
3	120	3	120	35	1337	67	2557
4	157	4	158	36	1376	68	2594
5	196	5	196	27	1414	69	2632
6	233	6	234	28	1452	70	2670
7	272	7	272	29	1490	71	2709
8	310	8	310	40	1528	72	2747
9	347	9	348	41	1566	73	2784
10	386	10	386	42	1604	74	2823
11	424	11	424	43	1642	75	2860
12	462	12	462	44	1680	76	2898
13	500	13	500	45	1718	77	2936
14	538	14	538	46	1756	78	2974
15	576	15	576	47	1795	79	3012
16	614	16	615	48	1833	80	3050
17	652	17	653	49	1870	81	3088
18	690	18	690	50	1909	82	3127
19	728	19	729	51	1947	83	3165
20	767	20	767	52	1984	84	3202
21	804	21	805	53	2023	85	3240
22	842	22	843	54	2061	86	3279
23	880	23	881	55	2099	87	3316
24	918	24	919	56	2137	88	3355
25	956	25	957	57	2175	89	3398
26	994	26	995	58	2213	90	3430
27	1032	27	1033	59	2251	91	3469
28	1070	28	1071	60	2289	92	3507
29	1108	29	1109	61	2328	93	3545
30	1146	30	1147	62	2365	94	3583
31	1184	31	1185	63	2404	95	3622
32	1221	32	1223	64	2442	96	3660

Width Length

Holes	Width	Holes	Length	Holes	Length	Holes	Length
1	43	1	44	33	1261	65	2480
2	82	2	82	34	1299	66	2518
3	120	3	120	35	1337	67	2557
4	157	4	158	36	1376	68	2594
5	196	5	196	27	1414	69	2632
6	233	6	234	28	1452	70	2670
7	272	7	272	29	1490	71	2709
8	310	8	310	40	1528	72	2747
9	347	9	348	41	1566	73	2784
10	386	10	386	42	1604	74	2823
11	424	11	424	43	1642	75	2860
12	462	12	462	44	1680	76	2898
13	500	13	500	45	1718	77	2936
14	538	14	538	46	1756	78	2974
15	576	15	576	47	1795	79	3012
16	614	16	615	48	1833	80	3050
17	652	17	653	49	1870	81	3088
18	690	18	690	50	1909	82	3127
19	728	19	729	51	1947	83	3165
20	767	20	767	52	1984	84	3202
21	804	21	805	53	2023	85	3240
22	842	22	843	54	2061	86	3279
23	880	23	881	55	2099	87	3316
24	918	24	919	56	2137	88	3355
25	956	25	957	57	2175	89	3398
26	994	26	995	58	2213	90	3430
27	1032	27	1033	59	2251	91	3469
28	1070	28	1071	60	2289	92	3507
29	1108	29	1109	61	2328	93	3545
30	1146	30	1147	62	2365	94	3583
31	1184	31	1185	63	2404	95	3622
32	1221	32	1223	64	2442	96	366

Width Length

Holes	Width	Holes	Length	Holes	Length	Holes	Length
1	43	1	44	33	1261	65	2480
2	82	2	82	34	1299	66	2518
3	120	3	120	35	1337	67	2557
4	157	4	158	36	1376	68	2594
5	196	5	196	27	1414	69	2632
6	233	6	234	28	1452	70	2670
7	272	7	272	29	1490	71	2709
8	310	8	310	40	1528	72	2747
9	347	9	348	41	1566	73	2784
10	386	10	386	42	1604	74	2823
11	424	11	424	43	1642	75	2860
12	462	12	462	44	1680	76	2898
13	500	13	500	45	1718	77	2936
14	538	14	538	46	1756	78	2974
15	576	15	576	47	1795	79	3012
16	614	16	615	48	1833	80	3050
17	652	17	653	49	1870	81	3088
18	690	18	690	50	1909	82	3127
19	728	19	729	51	1947	83	3165
20	767	20	767	52	1984	84	3202
21	804	21	805	53	2023	85	3240
22	842	22	843	54	2061	86	3279
23	880	23	881	55	2099	87	3316
24	918	24	919	56	2137	88	3355
25	956	25	957	57	2175	89	3398
26	994	26	995	58	2213	90	3430
27	1032	27	1033	59	2251	91	3469
28	1070	28	1071	60	2289	92	3507
29	1108	29	1109	61	2328	93	3545
30	1146	30	1147	62	2365	94	3583
31	1184	31	1185	63	2404	95	3622
32	1221	32	1223	64	2442	96	36

Point Load Capacity of FIBERA FRP Moulded Gratings

30 mm Height	Load Capacity	30 mm Height	Load Capacity
Clear Span (Out to Out Size)	Description	Clear Span (Out to Out Size)	Description
310 x 1221 mm	4 = Wheel Light Movement	310 x 1221 mm	4-Wheeler Heavy Movement
386 x 1221 mm	2 - Wheeler Movement	386 x 1221 mm	2-Wheeler Movement
424 x 1221 mm	Pedesteroam Movement	424 x 1221 mm	Pedestrian Movement

Standard Installation Guidelines

Proper installation is critical for long-term performance. Follow these mandatory steps for frame bedding and haunching to ensure your Fibera FRP covers maintain maximum structural integrity.

Ensure that you are using the right load capacity cover and frame based on vehicle/pedestrian movement. Please follow our load selection guide.
Do not drop or throw FIBERA cover or frame while placing it on the floor.
Avoid impact of sharp and/or heavy objects on the cover and frame.
Do not burn objects on or near the manhole cover, grating and frame.
Use only supplied covers with appropriate FIBERA FRP frames.
Use only FIBERA lifting key supplied with the FRP cover/grating to lift it.
Occasionally remove the cover from the frame and clean the rim of the frame of any dirt/dust/pebbles.
Do not leave the frame open without placing a cover or grating.

Installation Steps:

Prepare Bedding
Prepare the concrete bed after considering the height of the Fibera FRP frame.

Concrete Grade

The Fibera FRP frame should be completely embedded in a minimum of M-20 grade
concrete.

Clear Opening

Ensure that the manhole clear opening is equal or less than the opening of the Fibera FRP frame. Frame
resting should not be hanging without ground support.

Zero-Zero Leveling

Frame should be leveled using a spirit leveler and confirming that the air bubble in
the leveler remains exactly at the center (Zero-Zero Level)

Eliminate Gaps

Check gaps under the Fibera FRP Frame. Ensure that there are no visible gaps under
the frame and smooth bedding material with a trowel both inside and outside of the
chamber.

Final Enveloping

Use the remaining mortar to envelope the Fibera FRP Frame paying particular
attention to the corner areas. Smooth out the mortar with a trowel to ensure good
bonding with the frame and to avoid any initial cracks in the bedding material.

Prepare Bedding
Prepare the concrete bed after considering
the height of the Fibera FRP frame.

Concrete Grade

The Fibera FRP frame should be completely
embedded in a minimum of M-20 grade
concrete.

Clear Opening

Ensure that the manhole clear opening is
equal or less than the opening of the Fibera
FRP frame.

Zero-Zero Leveling

Frame should be leveled using a spirit leveler
and confirming that the air bubble in
the leveler remains exactly at the center
(Zero-Zero Level)

Eliminate Gaps

Check gaps under the Fibera FRP Frame.
Ensure that there are no visible gaps under
the frame and smooth bedding material with a trowel both inside and outside of the
chamber.

Final Enveloping

Use the remaining mortar to envelope the
Fibera FRP Frame paying particular
attention to the corner areas. Smooth out the
mortar with a trowel to ensure good
bonding with the frame and to avoid any initial cracks in the bedding material.

Visual Guide –

The Right vs. Wrong Way to Install

✅️ The Correct Method

(Flush & Supported)

The concrete bed is level, and the entire base of the FRP frame is resting solidly on the M-20 concrete. The top of the cover sits completely flush with the surrounding road/pedestrian surface.

❌ Wrong Method 1 (Unsupported Overhang)

The concrete bed is too wide, causing the inner lip of the FRP frame to hang over the manhole opening with zero support underneath. This will cause the frame to crack under heavy traffic loads.

❌ Wrong Method 2

(Uneven / Raised Frame)

The concrete bed is uneven or missing entirely under one side of the frame, causing the frame to sit at an angle or protrude above the road surface. This creates a tripping hazard and subjects the cover to severe impact damage from passing vehicle tires.

Ready to Upgrade to High-Performance FRP Gratings?

Contact Fibera FRP today to discuss your specific load requirements, request bulk pricing, or consult with our composite engineering experts. We deliver top-quality solutions across India.

Ready to Upgrade to High-Performance FRP Gratings?

Contact Fibera FRP today to discuss your specific load requirements, request bulk pricing, or consult with our composite engineering experts.

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FRP Moulded Gratings