Sliding Window Bars: How to Secure Wide Openings with Modular Systems
6th septiembre 2025
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This quick-reference guide helps you spec adjustable, modular window bars in minutes. Use the charts below to match telescopic height ranges, choose module counts by clear width, and decide between frame-mount and wall-mount for different substrates. We’ve also included an egress decision check, a mount selection matrix, and a printable cheat sheet for job folders. The examples are written for SWB (Security Windows Bars) systems—Model A, Model B, and Emergency-Exit—but the process works broadly. If you’re unsure about modules or mounts, send your measurements and a quick photo and we’ll spec it for you.
Measure the clear opening: width × height (inches). Record the smallest numbers.
Pick a telescopic height range that comfortably covers your height (avoid maxing out the adjustment if possible).
Plan width with modules: start with one core module and add modules until you reach your span. Center the assembly visually.
For measurement details, see How to Measure.
Use this chart to land in a comfortable range. Always confirm the exact range on the model page before ordering.
| Height band (H, in) | Recommended approach | Notes |
|---|---|---|
30-40″ |
Short-range telescopic setting |
Common for small baths & utility windows |
41-52″ |
Mid-range telescopic setting |
Typical for many basements & bedrooms |
53-65″ |
Tall-range telescopic setting |
Suited to tall openings; consider Model A/Emergency-Exit |
>65″ |
Validate case-by-case |
Consider split assemblies or layout changes; contact support |
Start with one core module. Add side-by-side modules to reach width W. Center the assembly.
For spans wider than ~79″, use two adjacent assemblies (left/right) or contact us for a layout.
| Clear width (W, in) | Typical configuration | Notes |
|---|---|---|
25-35″ |
Core only (or Core + small module for centering) |
Narrow openings |
36-48″ |
Core + 1 module |
Common bedrooms/basements |
49-60″ |
Core + 1–2 modules |
Wide single windows |
61-72″ |
Core + 2 modules |
Two-panel sliders (many cases) |
73-79″ |
Core + 3 modules |
Max typical span for one assembly |
>79″ |
Two assemblies (split span) |
For three-panel sliders or grouped panes |
Choose the mount based on structure—not just appearance.
| Opening / Substrate | Frame condition | Recommended mount | SWB model notes |
|---|---|---|---|
Wood/jambs (interior) |
Plumb & solid |
Frame-mount |
Model A or B |
Brick/block/stucco |
Masonry or uneven |
Wall-mount |
Model B preferred |
Out-of-square frames |
Twisted/irregular |
Wall-mount |
Model B to keep runs straight |
Wide sliders (60–79″) |
Long span |
Wall-mount |
Model B or Emergency-Exit if egress |
Mixed openings (portfolio) |
Varies |
Mix per window |
Standardize on A/B + EXIT where needed |
Deep dives: Wall-Mount Window Bars • Interior vs Exterior
s the window a required emergency exit? Bedrooms and many basements are—check your local rules.
If Yes → choose Emergency-Exit. Plan an interior-operable release and a swing test after install.
Keep the release accessible (no furniture/blinds blocking). Test monthly.
If No → fixed/standard models may be appropriate (still verify local requirements).
Learn more: Quick-Release Guide.
Height: Mid-range telescopic.
Width: Core + 1 module.
Mount: Frame-mount (jambs are plumb).
Model: Emergency-Exit (quick-release).
Note: Verify swing clears blinds; perform release test.
Height: Mid-range telescopic.
Width: Core + 2 modules.
Mount: Wall-mount for long, straight span.
Model: Model B (or Emergency-Exit if treated as egress).
Note: Maintain slight standoff; keep weep paths clear.
Height: Short-range telescopic.
Width: Core only (add small module if centering needed).
Mount: Frame-mount.
Model: Model A.
Interior: easiest quick-release access, less weather exposure.
Exterior: stronger visual deterrence; use proper anchors; inspect finish after storms.
Full pros/cons: Interior vs Exterior.
Record clear width × height (smallest values)
Identify egress status (Yes/No)
Choose telescopic height range (avoid max extension)
Plan module count to reach span (center assembly)
Select mount: frame vs wall (consider substrate & squareness)
Choose location: interior vs exterior
Verify obstructions: handles, blinds, sensors, trim
If Emergency-Exit: plan swing path & post-install test
Choose anchors per substrate (wood / brick / block / studs)
Add to order: core module + modules + mount hardware
Batch orders for multiple windows to reduce shipping and keep spare modules.
Buy direct for the best pricing and same-day sizing help.
Include photos (front, angle, and substrate close-up) with your measurements—this speeds our recommendation.
Spec’ing adjustable, modular window bars is straightforward: measure, pick a comfortable telescopic height, and add modules to reach your width. Choose the mount that matches your structure and use Emergency-Exit for egress windows. With SWB, you can standardize across real-world openings without custom ironwork—and finish installs faster.
Next steps: Buy Direct or send measurements for a same-day module recommendation. Review How to Measure and DIY Installation before you start.
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Last Updated: 01/01/25