AMICO-ISG - Safety Grating Products - Safety-Tread Ladder Rungs - Technical Details

AMICO-ISG
Safety Grating Products

Safety-Tread^®Ladder Rungs
Technical Details

1 1/4" Wide (2 Hole)

Type	Weight lb./ft.	Catalog Number	Load Type	Clear Span
Type	Weight lb./ft.	Catalog Number	Load Type	16"	18"	20"	24"
Steel 11 GA	1.2	LR1251B	C D	377 0.014	339 0.018	308 0.025	265 0.036
Stainless Steel 14 GA	.	LR1254S		available by request
Aluminum .125"	.	LR1258A		available by request

1 5/8" Wide (3 Hole)

Type	Weight lb./ft.	Catalog Number	Load Type	Clear Span
Type	Weight lb./ft.	Catalog Number	Load Type	16"	18"	20"	24"
Steel 13 GA	1.3	LR6253B	C D	260 0.020	230 0.029	200 0.037	175 0.065
Stainless Steel 14 GA	1.1	LR6254S	C D	280 0.044	250 0.051	225 0.065	185 0.080
Aluminum .125"	0.5	LR6258A	C D	240 0.069	214 0.085	193 0.099	161 0.137

2 1/4" Wide (4 Hole)

Type	Weight lb./ft.	Catalog Number	Load Type	Clear Span
Type	Weight lb./ft.	Catalog Number	Load Type	16"	18"	20"	24"
Steel 13 GA	1.5	LR2253B	C D	490 0.032	440 0.045	4000 0.050	345 0.065
Stainless Steel 14 GA	1.2	LR2254S	C D	415 0.020	375 0.029	340 0.040	290 0.050
Aluminum .125"	0.7	LR2258A	C D	390 0.280	350 0.041	320 0.050	255 0.067

Explanation of Load Type

C • concentrated load (lb.)
D • corresponding deflection (in.) resulting from concentrated load

Note:

All concentrated loads include a safety factor of 1.67.
Tolerance on all dimensions ±1/16"
Standard lengths are 5' 0"

Material Specifications

Ladder rungs shall be "Safety Tread^® Ladder Rungs," manufactured from (see 'Selections' below) by AMICO-ISG

Selections

ASTM-A-569, 13 or 11 gauge, HRP&O steel.
ASTM-A-526, 13 gauge, G-90 (Z-275) Pre-galvanized steel.
5052H32 .125" thick, Aluminum.
Type 316L, 14 gauge Stainless Steel.