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| Extending ladder | Combined step-extension ladder | Two sides ascendable standing rung ladder |
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| Two sides ascendable standing step ladder | One side ascendbale standing step ladder | One piece leaning ladder |
Type
FRP ladders include:one-piece leaning ladder,extending ladder,standing ladder.Ascendable sections are divided as rung and step.
Ladder Structure
Ladder structural consists of rung(or step),platform,supporting section,handrail,bottom brace,openling restraint,hinge,resting support,foot,antiskid device etc.
Material
Fiberglass roving/mat/veil as reinforcement,resin(polyester and epoxy resin or vinyl ester)as matrix,in the resin adds light stabilizer for protection against ultraviolet,using pultrusion process.
Properties
Property:compliance ANSI A 14.5/OSHA. Function see table below.
|
| Compliance
ANSI A 14.5/OSHA,function see table below |
| |
b1 |
b2 |
c |
d |
l4 |
l5 |
l6 |
l7 |
α |
β |
| min |
280 |
b1+0.1l2+2t |
- |
600 |
0.5l5 |
230 |
250 |
250 |
60กใ |
65กใ |
| max |
- |
- |
30 |
|
l5+15 |
- |
- |
- |
70กใ |
75กใ |
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| One side ascendable standing
step ladder with platform and rail, Platform as step |
Two sides ascendable standing step ladder |
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