They are one piece welded assemblies for use in applications less than 20 in vertical height.
Roof access ladder details.
Individual treads are attached to siderails using 4 rivets rated at 1100 lbs.
Side members are 1 4 x2 x2 steel angle.
Constructed with lightweight corrosion resistant low maintenance aluminum and heavy duty stainless steel hardware these interior or exterior roof access ladders are designed for maximum climbing comfort and user safety.
These ladders have been thoroughly tested for strength and are able to withstand a 1500 loading without failure.
Precision s ladder treads are a full 2 1 4 in width and they are deeply serrated to maximize traction.
Shear strength each and have been tested to 3 000 without deformation.
Precision ladders llc cad details for ladders.
Wall attachment hardware is also available on request.
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When not in use they fold up for a flush fit with the ceiling surface.
3 4 corrugated steel round climbing rungs on 12 centers.
Each ladder is provided with necessary hardware.
Download free high quality cad drawings blocks and details of metal ladders organized by masterformat.
D 2 of this section with minimum clearances for intermediate pitches varying between these two limits in proportion to the slope except as provided in subparagraphs 3 and 5 of this paragraph.
Ladders are designed for applications where safe landing access is required.
At o keeffe s we offer a complete line of customizable interior or exterior roof access ladder models that allow for safe and easy access to rooftops mezzanines and many other elevated areas.
On fixed ladders the perpendicular distance from the centerline of the rungs to the nearest permanent object on the climbing side of the ladder shall be 36 inches for a pitch of 76 degrees and 30 inches for a pitch of 90 degrees fig.
Ceiling mount foldaway ladders access roofs commercial attics and mezzanines from inside with these ceiling mount ladders.